From structure topology to chemical composition. XII.Titanium silicates : the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3
Rinkite, ideally Na 2Ca 4 REETi(Si 2O 7) 2OF 3, is a common mineral in alkaline andperalkaline rocks. The crystal structures of five rinkite crystals from three alkaline massifs: Ilimaussaq, Greenland; Khibiny, Kola Peninsula, Russia andMont Saint-Hilaire, Canada, have been refinedas two components...
Published in: | Mineralogical Magazine |
---|---|
Main Authors: | , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Mineralogical Society of Great Britain
2011
|
Subjects: | |
Online Access: | http://hdl.handle.net/2434/478880 https://doi.org/10.1180/minmag.2011.075.6.2755 |
id |
ftunivmilanoair:oai:air.unimi.it:2434/478880 |
---|---|
record_format |
openpolar |
spelling |
ftunivmilanoair:oai:air.unimi.it:2434/478880 2024-01-21T10:06:41+01:00 From structure topology to chemical composition. XII.Titanium silicates : the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3 F. Cámara E. Sokolova F. C. Hawthorne F. Cámara E. Sokolova F.C. Hawthorne 2011-12 http://hdl.handle.net/2434/478880 https://doi.org/10.1180/minmag.2011.075.6.2755 eng eng Mineralogical Society of Great Britain info:eu-repo/semantics/altIdentifier/wos/WOS:000298307000004 volume:75 issue:6 firstpage:2755 lastpage:2774 numberofpages:20 journal:MINERALOGICAL MAGAZINE http://hdl.handle.net/2434/478880 doi:10.1180/minmag.2011.075.6.2755 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-83455198247 info:eu-repo/semantics/closedAccess chemical formula crystal structure EMP analysi Group I rinkite Ti disilicate mineral transmission electron microscopy Settore GEO/06 - Mineralogia info:eu-repo/semantics/article 2011 ftunivmilanoair https://doi.org/10.1180/minmag.2011.075.6.2755 2023-12-26T23:28:10Z Rinkite, ideally Na 2Ca 4 REETi(Si 2O 7) 2OF 3, is a common mineral in alkaline andperalkaline rocks. The crystal structures of five rinkite crystals from three alkaline massifs: Ilimaussaq, Greenland; Khibiny, Kola Peninsula, Russia andMont Saint-Hilaire, Canada, have been refinedas two components related by the TWIN matrix (-1 0 0, 0-1 0, 1 0 1) (Mo-Kα radiation). The crystals, a = 7.4132-7.4414, b = 5.6595-5.6816, c = 18.8181-18.9431 Å, β = 101.353-101.424(2)°, V = 776.1-786.7 Å 3, space group P2 1/c, Z = 2, D calc = 3.376-3.502 g cm 3, were analysedusing an electron microprobe subsequent to collection of the X-ray intensity data. Transmission electron microscopy confirmed the presence of pseudomerohedral twinning in rinkite crystals. The crystal structure of rinkite is a framework of TS (titanium silicate) blocks. The TS block consists of HOH sheets (H-heteropolyhedral, O-octahedral). The TS block in rinkite exhibits linkage andstereochemistry typical for Group I (Ti = 1 a.p.f.u.) of Ti disilicate minerals: two H sheets connect to the O sheet such that two (Si 2O 7) groups link to the trans edges of a Na polyhedron of the O sheet. The crystal chemistry of rinkite and nacareniobsite-(Ce) is discussed. Article in Journal/Newspaper Greenland kola peninsula The University of Milan: Archivio Istituzionale della Ricerca (AIR) Kola Peninsula Canada Greenland Khibiny ENVELOPE(33.210,33.210,67.679,67.679) Ilimaussaq ENVELOPE(-45.900,-45.900,60.983,60.983) Mineralogical Magazine 75 6 2755 2774 |
institution |
Open Polar |
collection |
The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
op_collection_id |
ftunivmilanoair |
language |
English |
topic |
chemical formula crystal structure EMP analysi Group I rinkite Ti disilicate mineral transmission electron microscopy Settore GEO/06 - Mineralogia |
spellingShingle |
chemical formula crystal structure EMP analysi Group I rinkite Ti disilicate mineral transmission electron microscopy Settore GEO/06 - Mineralogia F. Cámara E. Sokolova F. C. Hawthorne From structure topology to chemical composition. XII.Titanium silicates : the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3 |
topic_facet |
chemical formula crystal structure EMP analysi Group I rinkite Ti disilicate mineral transmission electron microscopy Settore GEO/06 - Mineralogia |
description |
Rinkite, ideally Na 2Ca 4 REETi(Si 2O 7) 2OF 3, is a common mineral in alkaline andperalkaline rocks. The crystal structures of five rinkite crystals from three alkaline massifs: Ilimaussaq, Greenland; Khibiny, Kola Peninsula, Russia andMont Saint-Hilaire, Canada, have been refinedas two components related by the TWIN matrix (-1 0 0, 0-1 0, 1 0 1) (Mo-Kα radiation). The crystals, a = 7.4132-7.4414, b = 5.6595-5.6816, c = 18.8181-18.9431 Å, β = 101.353-101.424(2)°, V = 776.1-786.7 Å 3, space group P2 1/c, Z = 2, D calc = 3.376-3.502 g cm 3, were analysedusing an electron microprobe subsequent to collection of the X-ray intensity data. Transmission electron microscopy confirmed the presence of pseudomerohedral twinning in rinkite crystals. The crystal structure of rinkite is a framework of TS (titanium silicate) blocks. The TS block consists of HOH sheets (H-heteropolyhedral, O-octahedral). The TS block in rinkite exhibits linkage andstereochemistry typical for Group I (Ti = 1 a.p.f.u.) of Ti disilicate minerals: two H sheets connect to the O sheet such that two (Si 2O 7) groups link to the trans edges of a Na polyhedron of the O sheet. The crystal chemistry of rinkite and nacareniobsite-(Ce) is discussed. |
author2 |
F. Cámara E. Sokolova F.C. Hawthorne |
format |
Article in Journal/Newspaper |
author |
F. Cámara E. Sokolova F. C. Hawthorne |
author_facet |
F. Cámara E. Sokolova F. C. Hawthorne |
author_sort |
F. Cámara |
title |
From structure topology to chemical composition. XII.Titanium silicates : the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3 |
title_short |
From structure topology to chemical composition. XII.Titanium silicates : the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3 |
title_full |
From structure topology to chemical composition. XII.Titanium silicates : the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3 |
title_fullStr |
From structure topology to chemical composition. XII.Titanium silicates : the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3 |
title_full_unstemmed |
From structure topology to chemical composition. XII.Titanium silicates : the crystal chemistry of rinkite, Na2Ca4REETi(Si2O7)2OF3 |
title_sort |
from structure topology to chemical composition. xii.titanium silicates : the crystal chemistry of rinkite, na2ca4reeti(si2o7)2of3 |
publisher |
Mineralogical Society of Great Britain |
publishDate |
2011 |
url |
http://hdl.handle.net/2434/478880 https://doi.org/10.1180/minmag.2011.075.6.2755 |
long_lat |
ENVELOPE(33.210,33.210,67.679,67.679) ENVELOPE(-45.900,-45.900,60.983,60.983) |
geographic |
Kola Peninsula Canada Greenland Khibiny Ilimaussaq |
geographic_facet |
Kola Peninsula Canada Greenland Khibiny Ilimaussaq |
genre |
Greenland kola peninsula |
genre_facet |
Greenland kola peninsula |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000298307000004 volume:75 issue:6 firstpage:2755 lastpage:2774 numberofpages:20 journal:MINERALOGICAL MAGAZINE http://hdl.handle.net/2434/478880 doi:10.1180/minmag.2011.075.6.2755 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-83455198247 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1180/minmag.2011.075.6.2755 |
container_title |
Mineralogical Magazine |
container_volume |
75 |
container_issue |
6 |
container_start_page |
2755 |
op_container_end_page |
2774 |
_version_ |
1788697164804784128 |