Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures
Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordi...
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| Autor*in: |
Taran, Michail N. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2007 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag 2007 |
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| Übergeordnetes Werk: |
Enthalten in: Physics and chemistry of minerals - Springer-Verlag, 1977, 35(2007), 3 vom: 14. Nov., Seite 117-127 |
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| Übergeordnetes Werk: |
volume:35 ; year:2007 ; number:3 ; day:14 ; month:11 ; pages:117-127 |
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| DOI / URN: |
10.1007/s00269-007-0202-6 |
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| Katalog-ID: |
OLC2072368111 |
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| 100 | 1 | |a Taran, Michail N. |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures |
| 264 | 1 | |c 2007 | |
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| 500 | |a © Springer-Verlag 2007 | ||
| 520 | |a Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. | ||
| 650 | 4 | |a Optical absorption spectra | |
| 650 | 4 | |a Ni | |
| 650 | 4 | |a Pyroxene | |
| 650 | 4 | |a High-pressure | |
| 700 | 1 | |a Ohashi, Haruo |4 aut | |
| 700 | 1 | |a Koch-Müller, Monika |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Physics and chemistry of minerals |d Springer-Verlag, 1977 |g 35(2007), 3 vom: 14. Nov., Seite 117-127 |w (DE-627)129323039 |w (DE-600)131393-9 |w (DE-576)014557398 |x 0342-1791 |7 nnns |
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10.1007/s00269-007-0202-6 doi (DE-627)OLC2072368111 (DE-He213)s00269-007-0202-6-p DE-627 ger DE-627 rakwb eng 550 540 530 VZ BIODIV DE-30 fid Taran, Michail N. verfasserin aut Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. Optical absorption spectra Ni Pyroxene High-pressure Ohashi, Haruo aut Koch-Müller, Monika aut Enthalten in Physics and chemistry of minerals Springer-Verlag, 1977 35(2007), 3 vom: 14. Nov., Seite 117-127 (DE-627)129323039 (DE-600)131393-9 (DE-576)014557398 0342-1791 nnns volume:35 year:2007 number:3 day:14 month:11 pages:117-127 https://doi.org/10.1007/s00269-007-0202-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2003 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4323 AR 35 2007 3 14 11 117-127 |
| spelling |
10.1007/s00269-007-0202-6 doi (DE-627)OLC2072368111 (DE-He213)s00269-007-0202-6-p DE-627 ger DE-627 rakwb eng 550 540 530 VZ BIODIV DE-30 fid Taran, Michail N. verfasserin aut Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. Optical absorption spectra Ni Pyroxene High-pressure Ohashi, Haruo aut Koch-Müller, Monika aut Enthalten in Physics and chemistry of minerals Springer-Verlag, 1977 35(2007), 3 vom: 14. Nov., Seite 117-127 (DE-627)129323039 (DE-600)131393-9 (DE-576)014557398 0342-1791 nnns volume:35 year:2007 number:3 day:14 month:11 pages:117-127 https://doi.org/10.1007/s00269-007-0202-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2003 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4323 AR 35 2007 3 14 11 117-127 |
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10.1007/s00269-007-0202-6 doi (DE-627)OLC2072368111 (DE-He213)s00269-007-0202-6-p DE-627 ger DE-627 rakwb eng 550 540 530 VZ BIODIV DE-30 fid Taran, Michail N. verfasserin aut Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. Optical absorption spectra Ni Pyroxene High-pressure Ohashi, Haruo aut Koch-Müller, Monika aut Enthalten in Physics and chemistry of minerals Springer-Verlag, 1977 35(2007), 3 vom: 14. Nov., Seite 117-127 (DE-627)129323039 (DE-600)131393-9 (DE-576)014557398 0342-1791 nnns volume:35 year:2007 number:3 day:14 month:11 pages:117-127 https://doi.org/10.1007/s00269-007-0202-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2003 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4323 AR 35 2007 3 14 11 117-127 |
| allfieldsGer |
10.1007/s00269-007-0202-6 doi (DE-627)OLC2072368111 (DE-He213)s00269-007-0202-6-p DE-627 ger DE-627 rakwb eng 550 540 530 VZ BIODIV DE-30 fid Taran, Michail N. verfasserin aut Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. Optical absorption spectra Ni Pyroxene High-pressure Ohashi, Haruo aut Koch-Müller, Monika aut Enthalten in Physics and chemistry of minerals Springer-Verlag, 1977 35(2007), 3 vom: 14. Nov., Seite 117-127 (DE-627)129323039 (DE-600)131393-9 (DE-576)014557398 0342-1791 nnns volume:35 year:2007 number:3 day:14 month:11 pages:117-127 https://doi.org/10.1007/s00269-007-0202-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2003 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4323 AR 35 2007 3 14 11 117-127 |
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10.1007/s00269-007-0202-6 doi (DE-627)OLC2072368111 (DE-He213)s00269-007-0202-6-p DE-627 ger DE-627 rakwb eng 550 540 530 VZ BIODIV DE-30 fid Taran, Michail N. verfasserin aut Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. Optical absorption spectra Ni Pyroxene High-pressure Ohashi, Haruo aut Koch-Müller, Monika aut Enthalten in Physics and chemistry of minerals Springer-Verlag, 1977 35(2007), 3 vom: 14. Nov., Seite 117-127 (DE-627)129323039 (DE-600)131393-9 (DE-576)014557398 0342-1791 nnns volume:35 year:2007 number:3 day:14 month:11 pages:117-127 https://doi.org/10.1007/s00269-007-0202-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OLC-DE-84 SSG-OPC-GGO GBV_ILN_21 GBV_ILN_32 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2003 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2027 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4323 AR 35 2007 3 14 11 117-127 |
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Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures |
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optical spectroscopic study of synthetic $ nascsi_{2} $$ o_{6} $–$ canisi_{2} $$ o_{6} $ pyroxenes at normal and high pressures |
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Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures |
| abstract |
Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. © Springer-Verlag 2007 |
| abstractGer |
Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. © Springer-Verlag 2007 |
| abstract_unstemmed |
Abstract Six synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes were studied by optical absorption spectroscopy. Five of them of intermediate ($ Na_{1−x} $, $ Ca_{x} $)($ Sc_{1−x} $, $ Ni_{x} $)$ Si_{2} $$ O_{6} $ compositions show spectra typical of $ Ni^{2+} $ in octahedral coordination, more precise $ Ni^{2+} $ at the M1 site of the pyroxene structure. The common feature of all spectra is three broad absorption bands with maxima around 8,000, 13,000 and 24,000 $ cm^{−1} $ assigned to 3A2g → 3T2g, 3A2g → 3T1g and →3T1g (3P) electronic spin-allowed transitions of VI$ Ni^{2+} $. A weak narrow peak at ∼14,400 $ cm^{−1} $ is assigned to the spin-forbidden 3A2g → 1T2g (1D) transition of $ Ni^{2+} $. Under pressure the spin-allowed bands shift to higher energies and change in intensity. The octahedral compression modulus, $$ k^{{{\text{loc}}}}_{{{\text{Ni}}{\left( {{\text{M}}1} \right)}}} , $$ calculated from the shift of the 3A2g → 3T2g band in the ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $ pyroxene is evaluated as 85±20 GPa. The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. The octahedral compression modulus of $ Ni^{2+} $(M1) in this end-member pyroxene is evaluated as 150 ± 25 GPa, which is noticeably larger than in $ Ni_{0.3} $ pyroxene. This is due to a smaller size and, thus, a stiffer character of $ Ni^{2+} $(M1)$ O_{6} $ octahedron in the ($ Ca_{0.93} $$ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $ pyroxene compared to ($ Na_{0.7} $$ Ca_{0.3} $)($ Sc_{0.7} $$ Ni_{0.3} $)$ Si_{2} $$ O_{6} $. © Springer-Verlag 2007 |
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| container_issue |
3 |
| title_short |
Optical spectroscopic study of synthetic $ NaScSi_{2} $$ O_{6} $–$ CaNiSi_{2} $$ O_{6} $ pyroxenes at normal and high pressures |
| url |
https://doi.org/10.1007/s00269-007-0202-6 |
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| author2 |
Ohashi, Haruo Koch-Müller, Monika |
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Ohashi, Haruo Koch-Müller, Monika |
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| doi_str |
10.1007/s00269-007-0202-6 |
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2024-07-03T14:43:23.669Z |
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The Racah parameter B of $ Ni^{2+} $(M1) is found gradually changing from ∼919 $ cm^{−1} $ at ambient pressure to ∼890 $ cm^{−1} $ at 6.18 GPa. The Ni end-member pyroxene [($ Ca_{0.93} $ $ Ni_{0.07} $)$ NiSi_{2} $$ O_{6} $] has a spectrum different from all others. In addition to the above mentioned bands of $ Ni^{2+} $(M1) it displays several new relatively intense and broad extra bands, which were attributed to electronic transitions of $ Ni^{2+} $ at the M2 site. In difference to $ CaO_{8} $ polyhedron geometry of an eightfold coordination, $ Ni^{2+} $(M2)$ O_{8} $ polyhedra are assumed to be relatively large distorted octahedra. Due to different distortions and different compressibilities of the M1 and M2 sites the $ Ni^{2+} $(M1)- and $ Ni^{2+} $(M2)-bands display rather different pressure-induced behaviors, becoming more resolved in the high-pressure spectra than in that measured at atmospheric pressure. 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