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dc.contributor.author
Kampf, A. R.
dc.contributor.author
Colombo, Fernando
dc.contributor.author
González Del Tánago, J.
dc.date.available
2018-08-06T17:15:23Z
dc.date.issued
2010-08
dc.identifier.citation
Kampf, A. R.; Colombo, Fernando; González Del Tánago, J.; Carlhintzeite, Ca2AlF7•H2O, from the Gigante granitic pegmatite, Córdoba province, Argentina: Description and crystal structure; Mineralogical Soc; Mineralogical Magazine; 74; 4; 8-2010; 623-632
dc.identifier.issn
0026-461X
dc.identifier.uri
http://hdl.handle.net/11336/54262
dc.description.abstract
Carlhintzeite, Ca2AlF7•H2O, has been found at the Gigante pegmatite, Punilla Department, Córdoba Province, Argentina. It occurs as colourless prismatic crystals up to 0.8 mm long, ubiquitously twinned on {001}. Electron microprobe analyses provided the empirical formula Ca1.98Al1.02F6.24(OH) 0.76•H1.62O. A crystal fragment used for the collection of structure data provided the triclinic, C1 cell: a = 9.4227(4), b = 6.9670(5), c = 9.2671(7) Å, α = 90.974(6), β = 104.802(5), γ = 90.026(6)°, V = 558.08(7) Å3 and Z = 4. The crystal structure, solved by direct methods and refined to R 1 = 0.0322 for 723 Fo > 4σF reflections, is made up of linkages of AlF6 octahedra, CaF8 polyhedra and CaF 6(H2O)2 polyhedra. The AlF6 octahedra are isolated from one another, but share polyhedral elements with Ca polyhedra. Most notably, the Al1 octahedron shares trans faces with two CaF 8 polyhedra and the Al2 octahedron shares trans edges with two CaF6(H2O)2 polyhedra. The linkage of the Ca polyhedra alone can be described as a framework in which edge-sharing chains along b are cross-linked by edge-sharing. Edge-sharing chains of Ca polyhedra along b in the carlhintzeite structure are similar to those along c in the structures of gearksutite, CaAlF4(OH)•(H2O), and prosopite, CaAl2F4(OH)4. © 2010 Mineralogical Society.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Mineralogical Soc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Argentina
dc.subject
Carlhintzeite
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Cordoba
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Crystal Structure
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Gearksutite
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Prosopite
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Carlhintzeite, Ca2AlF7•H2O, from the Gigante granitic pegmatite, Córdoba province, Argentina: Description and crystal structure
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-02T14:49:15Z
dc.journal.volume
74
dc.journal.number
4
dc.journal.pagination
623-632
dc.journal.pais
Reino Unido
dc.journal.ciudad
Middlesex
dc.description.fil
Fil: Kampf, A. R.. Natural History Museum of Los Angeles County; Estados Unidos
dc.description.fil
Fil: Colombo, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
dc.description.fil
Fil: González Del Tánago, J.. Universidad Complutense de Madrid; España
dc.journal.title
Mineralogical Magazine
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.ingentaconnect.com/contentone/minsoc/mag/2010/00000074/00000004/art00003
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1180/minmag.2010.074.4.623
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