From structure topology to chemical composition. XI. Titanium silicates : Crystal structures of innelite-1T and innelite-2M from the Inagli massif, Yakutia, Russia, and the crystal chemistry of innelite
The crystal structures of two polytypes of innelite, ideally Ba 4Ti2Na2M2+Ti(Si2O 7)2[(SO4)(PO4)]O2[O(OH)] where M2+ = Mn, Fe2+, Mg, Ca: innelite-1T, a 5.4234(9), b 7.131(1), c 14.785(3) Å, α 98.442(4), β 94.579(3), γ 90.009(4)°, V 563.7(3) Å3, space group P1, D calc. = 4.028 g/cm3, Z = 1; and innel...
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ftunivmilanoair:oai:air.unimi.it:2434/478952 2024-02-04T10:05:12+01:00 From structure topology to chemical composition. XI. Titanium silicates : Crystal structures of innelite-1T and innelite-2M from the Inagli massif, Yakutia, Russia, and the crystal chemistry of innelite E. Sokolova F. C. Hawthorne F. Cámara E. Sokolova F. Cámara F.C. Hawthorne 2011-08 http://hdl.handle.net/2434/478952 https://doi.org/10.1180/minmag.2011.075.4.2495 eng eng Mineralogical Society of Great Britain info:eu-repo/semantics/altIdentifier/wos/WOS:000295214200012 volume:75 issue:4 firstpage:2495 lastpage:2518 numberofpages:24 journal:MINERALOGICAL MAGAZINE http://hdl.handle.net/2434/478952 doi:10.1180/minmag.2011.075.4.2495 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-80053023897 info:eu-repo/semantics/closedAccess chemical formula crystal structure refinement EMP analysi Group III HRTEM innelite-1T innelite-2M polytypism Ti-disilicate mineral Settore GEO/06 - Mineralogia info:eu-repo/semantics/article 2011 ftunivmilanoair https://doi.org/10.1180/minmag.2011.075.4.2495 2024-01-09T23:35:44Z The crystal structures of two polytypes of innelite, ideally Ba 4Ti2Na2M2+Ti(Si2O 7)2[(SO4)(PO4)]O2[O(OH)] where M2+ = Mn, Fe2+, Mg, Ca: innelite-1T, a 5.4234(9), b 7.131(1), c 14.785(3) Å, α 98.442(4), β 94.579(3), γ 90.009(4)°, V 563.7(3) Å3, space group P1, D calc. = 4.028 g/cm3, Z = 1; and innelite-2M, a 5.4206(8), b 7.125(1), c 29.314(4) Å, β 94.698(3)°, V 1128.3(2) Å3, space group P2/c, D calc. = 4.024 g/cm 3, Z = 2, from the Inagli massif, Yakutia, Russia, have been refined to R values of 8.99 and 7.60%, respectively. Electron-microprobe analysis gave the empirical formula for innelite as (Ba3.94Sr0.06) S 4.00(Na2.16Mn2+0.38Fe 2+0.17Mg0.15Ca0.10□ 0.04)Σ3(Ti2.97Nb0.02Al 0.02)Σ3.01Si4.01(S1.02P 0.81□0.17)Σ2H1.84O 25.79F0.21 which is equivalent to(Ba3.94Sr 0.06)Σ4.00(Ti1.97Nb0.02Al 0.02)Σ2.01(Na2.16Mn2+0.38Fe2+0.17Mg0.15Ca 0.10□0.04)Σ3Ti(Si 4.01O14)[(SO4)1.02(PO 4)0.81(OH)0.51H2O 0.17]O2[(OH0.99F0.21) Σ1.20O0.80], calculated on the basis of 26 (O + F) anions, with H2O calculated from structure refinement. The crystal structure of innelite is a combination of a TS (titanium silicate) block and an I (intermediate) block. The TS block consists of HOH sheets (H-heteropolyhedral, O-octahedral) and exhibits linkage and stereochemistry typical for Ti-disilicate minerals of Group III (Ti = 3 a.p.f.u.): twoH sheets co nnect tothe O sheet such that two(Si2O7) groups link to the trans edges of a Ti octahedron of the O sheet. The I block contains T sites, statistically occupied by S and P, and Ba atoms. In the structures of innelite-1T and innelite-2M, TS blocks are related by an inversion centre and a c y glide plane, respectively. HRTEM images show a coherent intergrowth of the two polytypes, together with an as-yet unidentified ∼10 Å phase. Article in Journal/Newspaper Yakutia The University of Milan: Archivio Istituzionale della Ricerca (AIR) Mineralogical Magazine 75 4 2495 2518 |
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The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
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ftunivmilanoair |
language |
English |
topic |
chemical formula crystal structure refinement EMP analysi Group III HRTEM innelite-1T innelite-2M polytypism Ti-disilicate mineral Settore GEO/06 - Mineralogia |
spellingShingle |
chemical formula crystal structure refinement EMP analysi Group III HRTEM innelite-1T innelite-2M polytypism Ti-disilicate mineral Settore GEO/06 - Mineralogia E. Sokolova F. C. Hawthorne F. Cámara From structure topology to chemical composition. XI. Titanium silicates : Crystal structures of innelite-1T and innelite-2M from the Inagli massif, Yakutia, Russia, and the crystal chemistry of innelite |
topic_facet |
chemical formula crystal structure refinement EMP analysi Group III HRTEM innelite-1T innelite-2M polytypism Ti-disilicate mineral Settore GEO/06 - Mineralogia |
description |
The crystal structures of two polytypes of innelite, ideally Ba 4Ti2Na2M2+Ti(Si2O 7)2[(SO4)(PO4)]O2[O(OH)] where M2+ = Mn, Fe2+, Mg, Ca: innelite-1T, a 5.4234(9), b 7.131(1), c 14.785(3) Å, α 98.442(4), β 94.579(3), γ 90.009(4)°, V 563.7(3) Å3, space group P1, D calc. = 4.028 g/cm3, Z = 1; and innelite-2M, a 5.4206(8), b 7.125(1), c 29.314(4) Å, β 94.698(3)°, V 1128.3(2) Å3, space group P2/c, D calc. = 4.024 g/cm 3, Z = 2, from the Inagli massif, Yakutia, Russia, have been refined to R values of 8.99 and 7.60%, respectively. Electron-microprobe analysis gave the empirical formula for innelite as (Ba3.94Sr0.06) S 4.00(Na2.16Mn2+0.38Fe 2+0.17Mg0.15Ca0.10□ 0.04)Σ3(Ti2.97Nb0.02Al 0.02)Σ3.01Si4.01(S1.02P 0.81□0.17)Σ2H1.84O 25.79F0.21 which is equivalent to(Ba3.94Sr 0.06)Σ4.00(Ti1.97Nb0.02Al 0.02)Σ2.01(Na2.16Mn2+0.38Fe2+0.17Mg0.15Ca 0.10□0.04)Σ3Ti(Si 4.01O14)[(SO4)1.02(PO 4)0.81(OH)0.51H2O 0.17]O2[(OH0.99F0.21) Σ1.20O0.80], calculated on the basis of 26 (O + F) anions, with H2O calculated from structure refinement. The crystal structure of innelite is a combination of a TS (titanium silicate) block and an I (intermediate) block. The TS block consists of HOH sheets (H-heteropolyhedral, O-octahedral) and exhibits linkage and stereochemistry typical for Ti-disilicate minerals of Group III (Ti = 3 a.p.f.u.): twoH sheets co nnect tothe O sheet such that two(Si2O7) groups link to the trans edges of a Ti octahedron of the O sheet. The I block contains T sites, statistically occupied by S and P, and Ba atoms. In the structures of innelite-1T and innelite-2M, TS blocks are related by an inversion centre and a c y glide plane, respectively. HRTEM images show a coherent intergrowth of the two polytypes, together with an as-yet unidentified ∼10 Å phase. |
author2 |
E. Sokolova F. Cámara F.C. Hawthorne |
format |
Article in Journal/Newspaper |
author |
E. Sokolova F. C. Hawthorne F. Cámara |
author_facet |
E. Sokolova F. C. Hawthorne F. Cámara |
author_sort |
E. Sokolova |
title |
From structure topology to chemical composition. XI. Titanium silicates : Crystal structures of innelite-1T and innelite-2M from the Inagli massif, Yakutia, Russia, and the crystal chemistry of innelite |
title_short |
From structure topology to chemical composition. XI. Titanium silicates : Crystal structures of innelite-1T and innelite-2M from the Inagli massif, Yakutia, Russia, and the crystal chemistry of innelite |
title_full |
From structure topology to chemical composition. XI. Titanium silicates : Crystal structures of innelite-1T and innelite-2M from the Inagli massif, Yakutia, Russia, and the crystal chemistry of innelite |
title_fullStr |
From structure topology to chemical composition. XI. Titanium silicates : Crystal structures of innelite-1T and innelite-2M from the Inagli massif, Yakutia, Russia, and the crystal chemistry of innelite |
title_full_unstemmed |
From structure topology to chemical composition. XI. Titanium silicates : Crystal structures of innelite-1T and innelite-2M from the Inagli massif, Yakutia, Russia, and the crystal chemistry of innelite |
title_sort |
from structure topology to chemical composition. xi. titanium silicates : crystal structures of innelite-1t and innelite-2m from the inagli massif, yakutia, russia, and the crystal chemistry of innelite |
publisher |
Mineralogical Society of Great Britain |
publishDate |
2011 |
url |
http://hdl.handle.net/2434/478952 https://doi.org/10.1180/minmag.2011.075.4.2495 |
genre |
Yakutia |
genre_facet |
Yakutia |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000295214200012 volume:75 issue:4 firstpage:2495 lastpage:2518 numberofpages:24 journal:MINERALOGICAL MAGAZINE http://hdl.handle.net/2434/478952 doi:10.1180/minmag.2011.075.4.2495 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-80053023897 |
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info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1180/minmag.2011.075.4.2495 |
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