Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure
Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type)...
Ausführliche Beschreibung
Autor*in: |
Ilyushin, G. D. [verfasserIn] |
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Sprache: |
Englisch |
Erschienen: |
2005 |
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Anmerkung: |
© Pleiades Publishing, Inc. 2005 |
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Übergeordnetes Werk: |
Enthalten in: Crystallography reports - Nauka/Interperiodica, 1993, 50(2005), 3 vom: Mai, Seite 504-512 |
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Übergeordnetes Werk: |
volume:50 ; year:2005 ; number:3 ; month:05 ; pages:504-512 |
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DOI / URN: |
10.1134/1.1927617 |
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Katalog-ID: |
OLC2070247120 |
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245 | 1 | 0 | |a Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure |
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520 | |a Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. | ||
650 | 4 | |a Crystallization | |
650 | 4 | |a Quartz | |
650 | 4 | |a Rutile | |
650 | 4 | |a Germanium | |
650 | 4 | |a Phase Relationship | |
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10.1134/1.1927617 doi (DE-627)OLC2070247120 (DE-He213)1.1927617-p DE-627 ger DE-627 rakwb eng 540 530 VZ Ilyushin, G. D. verfasserin aut Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure 2005 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Pleiades Publishing, Inc. 2005 Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. Crystallization Quartz Rutile Germanium Phase Relationship Enthalten in Crystallography reports Nauka/Interperiodica, 1993 50(2005), 3 vom: Mai, Seite 504-512 (DE-627)171187822 (DE-600)1162973-3 (DE-576)038500337 1063-7745 nnns volume:50 year:2005 number:3 month:05 pages:504-512 https://doi.org/10.1134/1.1927617 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_70 AR 50 2005 3 05 504-512 |
spelling |
10.1134/1.1927617 doi (DE-627)OLC2070247120 (DE-He213)1.1927617-p DE-627 ger DE-627 rakwb eng 540 530 VZ Ilyushin, G. D. verfasserin aut Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure 2005 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Pleiades Publishing, Inc. 2005 Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. Crystallization Quartz Rutile Germanium Phase Relationship Enthalten in Crystallography reports Nauka/Interperiodica, 1993 50(2005), 3 vom: Mai, Seite 504-512 (DE-627)171187822 (DE-600)1162973-3 (DE-576)038500337 1063-7745 nnns volume:50 year:2005 number:3 month:05 pages:504-512 https://doi.org/10.1134/1.1927617 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_70 AR 50 2005 3 05 504-512 |
allfields_unstemmed |
10.1134/1.1927617 doi (DE-627)OLC2070247120 (DE-He213)1.1927617-p DE-627 ger DE-627 rakwb eng 540 530 VZ Ilyushin, G. D. verfasserin aut Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure 2005 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Pleiades Publishing, Inc. 2005 Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. Crystallization Quartz Rutile Germanium Phase Relationship Enthalten in Crystallography reports Nauka/Interperiodica, 1993 50(2005), 3 vom: Mai, Seite 504-512 (DE-627)171187822 (DE-600)1162973-3 (DE-576)038500337 1063-7745 nnns volume:50 year:2005 number:3 month:05 pages:504-512 https://doi.org/10.1134/1.1927617 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_70 AR 50 2005 3 05 504-512 |
allfieldsGer |
10.1134/1.1927617 doi (DE-627)OLC2070247120 (DE-He213)1.1927617-p DE-627 ger DE-627 rakwb eng 540 530 VZ Ilyushin, G. D. verfasserin aut Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure 2005 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Pleiades Publishing, Inc. 2005 Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. Crystallization Quartz Rutile Germanium Phase Relationship Enthalten in Crystallography reports Nauka/Interperiodica, 1993 50(2005), 3 vom: Mai, Seite 504-512 (DE-627)171187822 (DE-600)1162973-3 (DE-576)038500337 1063-7745 nnns volume:50 year:2005 number:3 month:05 pages:504-512 https://doi.org/10.1134/1.1927617 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_70 AR 50 2005 3 05 504-512 |
allfieldsSound |
10.1134/1.1927617 doi (DE-627)OLC2070247120 (DE-He213)1.1927617-p DE-627 ger DE-627 rakwb eng 540 530 VZ Ilyushin, G. D. verfasserin aut Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure 2005 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Pleiades Publishing, Inc. 2005 Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. Crystallization Quartz Rutile Germanium Phase Relationship Enthalten in Crystallography reports Nauka/Interperiodica, 1993 50(2005), 3 vom: Mai, Seite 504-512 (DE-627)171187822 (DE-600)1162973-3 (DE-576)038500337 1063-7745 nnns volume:50 year:2005 number:3 month:05 pages:504-512 https://doi.org/10.1134/1.1927617 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_40 GBV_ILN_70 AR 50 2005 3 05 504-512 |
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D.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2005</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Pleiades Publishing, Inc. 2005</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. 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Ilyushin, G. D. |
spellingShingle |
Ilyushin, G. D. ddc 540 misc Crystallization misc Quartz misc Rutile misc Germanium misc Phase Relationship Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure |
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540 530 VZ Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure Crystallization Quartz Rutile Germanium Phase Relationship |
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ddc 540 misc Crystallization misc Quartz misc Rutile misc Germanium misc Phase Relationship |
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ddc 540 misc Crystallization misc Quartz misc Rutile misc Germanium misc Phase Relationship |
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title |
Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure |
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title_full |
Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure |
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Ilyushin, G. D. |
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Crystallography reports |
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2005 |
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Ilyushin, G. D. |
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Ilyushin, G. D. |
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10.1134/1.1927617 |
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540 530 |
title_sort |
hydrothermal crystallization in the koh-$ zro_{2} $-$ geo_{2} $-$ h_{2} $o system under 0.1 gpa pressure at 500°c: phase relationships for zr germanates and modeling of $ k_{2} $$ zrge_{2} $$ o_{7} $ crystal structure |
title_auth |
Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure |
abstract |
Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. © Pleiades Publishing, Inc. 2005 |
abstractGer |
Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. © Pleiades Publishing, Inc. 2005 |
abstract_unstemmed |
Abstract Formation of germanium dioxide of the composition R-$ GeO_{2} $ (rutile structure type), Zr germanate of the composition $ Zr^{[8]} $$ Ge^{[4]} $$ O_{4} $ (scheelite structure type), K,$ Zr^{[6]} $ germanates of the compositions $ K_{2} $$ Zr^{[6]} $Ge3[4]$ O_{9} $ (wadeite structure type) and $ K_{2} $$ Zr^{[6]} $Ge2[4]$ O_{7} $, K,$ Ge^{[6]} $ germanate of the composition $ K_{2} $$ Ge^{[6]} $Ge3[4]$ O_{9} $, and the K,$ Ge^{[6]} $ hydroxo germanate of the composition $ K_{3} $HGe4[6]Ge3[4]$ O_{16} $ · $ 4H_{2} $O is established in the KOH-$ ZrO_{2} $(nanocrystalline)-$ GeO_{2} $ (quartz structure type)-$ H_{2} $O system under the pressure 0.1 GPa at the temperature 500°C (the superscripts indicate the coordination numbers of Zr and Ge atoms with respect to oxygen). It is shown that crystallization of K,Zr germanates under hydrothermal conditions depends on the molar $ ZrO_{2} $/$ GeO_{2} $ ratio and KOH concentration. The phases synthesized are subjected to crystallochemical analysis. The specific characteristics of the matrix assembly of the $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure from suprapolyhedral structural units (SSU) are considered. The $ K_{2} $$ ZrGe_{2} $$ O_{7} $ structure having the MT2 framework built by M octahedra of the composition $ ZrO_{6} $ and T tetrahedra of the composition $ GeO_{4} $ is considered as a packing of SSU precursors of the composition $ K_{2} $M2T4. The chemical composition of the SSU precursor of the composition $ K_{2} $M2T4 with M: T = 1: 2 determines the lower boundary of germanium content in the three-dimensional framework structures of K,Zr germanates as Ge/Zr = 2. © Pleiades Publishing, Inc. 2005 |
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title_short |
Hydrothermal crystallization in the KOH-$ ZrO_{2} $-$ GeO_{2} $-$ H_{2} $O system under 0.1 GPa pressure at 500°C: Phase relationships for Zr germanates and modeling of $ K_{2} $$ ZrGe_{2} $$ O_{7} $ crystal structure |
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