Temperature-dependent disorder in a nautral Mg-Al-$ Fe^{2+} $-$ Fe^{3+} $-spinel
Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Giusta, Antonio Della [verfasserIn] |
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| Format: |
Artikel |
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| Erschienen: |
1996 |
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| Systematik: |
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| Anmerkung: |
© 2016 by Walter de Gruyter Berlin/Boston |
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| Übergeordnetes Werk: |
Enthalten in: Mineralogical magazine - De Gruyter, 1969, 60(1996), 4 vom: 01. Aug., Seite 603-616 |
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| Übergeordnetes Werk: |
volume:60 ; year:1996 ; number:4 ; day:01 ; month:08 ; pages:603-616 |
| Links: |
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| DOI / URN: |
10.1180/minmag.1996.060.401.06 |
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| Katalog-ID: |
OLC2137197855 |
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| 520 | |a Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. | ||
| 700 | 1 | |a Carbonin, Susanna |4 aut | |
| 700 | 1 | |a Ottonello, Giulio |4 aut | |
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| 856 | 4 | 1 | |u https://doi.org/10.1180/minmag.1996.060.401.06 |z lizenzpflichtig |3 Volltext |
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10.1180/minmag.1996.060.401.06 doi (DE-627)OLC2137197855 (DE-B1597)minmag.1996.060.401.06-p DE-627 ger DE-627 rakwb 550 VZ 13 ssgn TE 1000 VZ rvk Giusta, Antonio Della verfasserin aut Temperature-dependent disorder in a nautral Mg-Al-$ Fe^{2+} $-$ Fe^{3+} $-spinel 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. Carbonin, Susanna aut Ottonello, Giulio aut Enthalten in Mineralogical magazine De Gruyter, 1969 60(1996), 4 vom: 01. Aug., Seite 603-616 (DE-627)13069617X (DE-600)956157-2 (DE-576)016244141 0026-461X nnns volume:60 year:1996 number:4 day:01 month:08 pages:603-616 https://doi.org/10.1180/minmag.1996.060.401.06 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4112 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4323 TE 1000 AR 60 1996 4 01 08 603-616 |
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10.1180/minmag.1996.060.401.06 doi (DE-627)OLC2137197855 (DE-B1597)minmag.1996.060.401.06-p DE-627 ger DE-627 rakwb 550 VZ 13 ssgn TE 1000 VZ rvk Giusta, Antonio Della verfasserin aut Temperature-dependent disorder in a nautral Mg-Al-$ Fe^{2+} $-$ Fe^{3+} $-spinel 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. Carbonin, Susanna aut Ottonello, Giulio aut Enthalten in Mineralogical magazine De Gruyter, 1969 60(1996), 4 vom: 01. Aug., Seite 603-616 (DE-627)13069617X (DE-600)956157-2 (DE-576)016244141 0026-461X nnns volume:60 year:1996 number:4 day:01 month:08 pages:603-616 https://doi.org/10.1180/minmag.1996.060.401.06 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4112 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4323 TE 1000 AR 60 1996 4 01 08 603-616 |
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10.1180/minmag.1996.060.401.06 doi (DE-627)OLC2137197855 (DE-B1597)minmag.1996.060.401.06-p DE-627 ger DE-627 rakwb 550 VZ 13 ssgn TE 1000 VZ rvk Giusta, Antonio Della verfasserin aut Temperature-dependent disorder in a nautral Mg-Al-$ Fe^{2+} $-$ Fe^{3+} $-spinel 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. Carbonin, Susanna aut Ottonello, Giulio aut Enthalten in Mineralogical magazine De Gruyter, 1969 60(1996), 4 vom: 01. Aug., Seite 603-616 (DE-627)13069617X (DE-600)956157-2 (DE-576)016244141 0026-461X nnns volume:60 year:1996 number:4 day:01 month:08 pages:603-616 https://doi.org/10.1180/minmag.1996.060.401.06 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4112 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4323 TE 1000 AR 60 1996 4 01 08 603-616 |
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10.1180/minmag.1996.060.401.06 doi (DE-627)OLC2137197855 (DE-B1597)minmag.1996.060.401.06-p DE-627 ger DE-627 rakwb 550 VZ 13 ssgn TE 1000 VZ rvk Giusta, Antonio Della verfasserin aut Temperature-dependent disorder in a nautral Mg-Al-$ Fe^{2+} $-$ Fe^{3+} $-spinel 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. Carbonin, Susanna aut Ottonello, Giulio aut Enthalten in Mineralogical magazine De Gruyter, 1969 60(1996), 4 vom: 01. Aug., Seite 603-616 (DE-627)13069617X (DE-600)956157-2 (DE-576)016244141 0026-461X nnns volume:60 year:1996 number:4 day:01 month:08 pages:603-616 https://doi.org/10.1180/minmag.1996.060.401.06 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4112 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4323 TE 1000 AR 60 1996 4 01 08 603-616 |
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10.1180/minmag.1996.060.401.06 doi (DE-627)OLC2137197855 (DE-B1597)minmag.1996.060.401.06-p DE-627 ger DE-627 rakwb 550 VZ 13 ssgn TE 1000 VZ rvk Giusta, Antonio Della verfasserin aut Temperature-dependent disorder in a nautral Mg-Al-$ Fe^{2+} $-$ Fe^{3+} $-spinel 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. Carbonin, Susanna aut Ottonello, Giulio aut Enthalten in Mineralogical magazine De Gruyter, 1969 60(1996), 4 vom: 01. Aug., Seite 603-616 (DE-627)13069617X (DE-600)956157-2 (DE-576)016244141 0026-461X nnns volume:60 year:1996 number:4 day:01 month:08 pages:603-616 https://doi.org/10.1180/minmag.1996.060.401.06 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_31 GBV_ILN_40 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_285 GBV_ILN_2001 GBV_ILN_2004 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2027 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4112 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4323 TE 1000 AR 60 1996 4 01 08 603-616 |
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Enthalten in Mineralogical magazine 60(1996), 4 vom: 01. Aug., Seite 603-616 volume:60 year:1996 number:4 day:01 month:08 pages:603-616 |
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Enthalten in Mineralogical magazine 60(1996), 4 vom: 01. Aug., Seite 603-616 volume:60 year:1996 number:4 day:01 month:08 pages:603-616 |
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temperature-dependent disorder in a nautral mg-al-$ fe^{2+} $-$ fe^{3+} $-spinel |
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Temperature-dependent disorder in a nautral Mg-Al-$ Fe^{2+} $-$ Fe^{3+} $-spinel |
| abstract |
Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. © 2016 by Walter de Gruyter Berlin/Boston |
| abstractGer |
Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. © 2016 by Walter de Gruyter Berlin/Boston |
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Abstract A natural Mg-Al-Fe spinel from the Balmuccia peridotite (Italian Western Alps) was annealed at T between 650 and 1150°C, under controlled oxygen activity, and quenched in $ H_{2} $O. Twenty-three cation distributions were calculated from XRD structural refinements in tandem with microprobe analysis, and verified by Mössbauer spectroscopy in the case of unheated samples. Unheated crystals showed essentially ordered distribution of $ Fe^{3+} $ in octahedral and $ Fe^{2+} $ in tetrahedral sites, the only intracrystalline disorder being represented by ~0.12 atoms per formula unit of [4]Al and [6]Mg. Thermal runs and quenching maintained substantially ordered distribution of $ Fe^{2+} $ and $ Fe^{3+} $ up to ~990°C and produced continuous [4]Mg-[6]Al exchange. Between 990 and 1150°C, the previous order of $ Fe^{2+} $-$ Fe^{3+} $ appeared to change slightly, [6]$ Fe^{2+} $ reaching ∼0.04 afu and [6]Mg =̃ [4]Al =̃ 0.24 afu at the highest T. After quenching from this temperature, $ Fe^{2+} $ still resided mainly in the T site. Some previously heated crystals underwent reordering on lowering of the temperature. Experimental data, integrated with existing literature, enabled cation-oxygen distance in this structure to be improved. Results from annealed samples allowed the formulation of an experimental thermometric function based on Mg-Al intracrystalline disorder. © 2016 by Walter de Gruyter Berlin/Boston |
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