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GEOREF RECORD

Lead-antimony sulfosalts from Tuscany (Italy); II, Crystal structure of scainiite, Pb (sub 14) Sb (sub 30) S (sub 54) O (sub 5) , an expanded monoclinic derivative of Ba (sub 12) Bi (sub 24) S (sub 48) hexagonal sub-type (zinkenite group)

Yves Moelo, Alain Meerschaut, Paolo Orlandi and Pierre Palvadeau
Lead-antimony sulfosalts from Tuscany (Italy); II, Crystal structure of scainiite, Pb (sub 14) Sb (sub 30) S (sub 54) O (sub 5) , an expanded monoclinic derivative of Ba (sub 12) Bi (sub 24) S (sub 48) hexagonal sub-type (zinkenite group)
European Journal of Mineralogy (August 2000) 12 (4): 835-846

Abstract

The crystal structure of scainiite, Pb (sub 14) Sb (sub 30) S (sub 54) O (sub 5) , has been solved from single-crystal X-ray data and refined to an R index of 8.9% based on 3703 unique reflections. The structure is monoclinic C2/m, with cell parameters a 51.996(8), b 8.148(1), c 24.311(4) Aa, beta 104.09(1) degrees , V9990(10) Aa (super 3) , and with Z = 4. The structure analysis was essential in determining the position of oxygen atoms in a special double-ribbon, Sb (sub 8) (Pb,Sb) (sub 2) S (sub 10) O (sub 5) , directly related to the structure of kermesite, Sb (sub 2) S (sub 2) O. The general organization of the structure can be described according to the general principles developed by Makovicky (1993) for complex sulfides related to the PbS and SnS archetypes. This structure falls into the group of "pure rod structures" (zinkenite group), and is an expanded homologue of cyclic hexagonal Ba (sub 12) Bi (sub 24) S (sub 48) . The expansion of the parent structure is obtained by shearing along a zig-zag surface, that creates lozenge shaped spaces in place of the original hexagonal channels, and filling these spaces by the kermesite-type fragments.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 12
Serial Issue: 4
Title: Lead-antimony sulfosalts from Tuscany (Italy); II, Crystal structure of scainiite, Pb (sub 14) Sb (sub 30) S (sub 54) O (sub 5) , an expanded monoclinic derivative of Ba (sub 12) Bi (sub 24) S (sub 48) hexagonal sub-type (zinkenite group)
Affiliation: Institut des Materiaux Jean Rouxel, Laboratoire de Chimie des Solides, Nantes, France
Pages: 835-846
Published: 200008
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 22
Accession Number: 2001-025993
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
N42°19'60" - N44°19'60", E09°40'00" - E12°25'00"
Secondary Affiliation: Universita di Pisa, ITA, Italy
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200109
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