Acta Crystallographica Section B (Acta Crystallogr B Struct Crystallogr Cryst Chem)
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|Website||Acta Crystallographica - Section B: Structural Crystallography & Crystal Chemistry website|
|Other titles||Acta crystallographica. Section B, Structural science, Structural science|
|Material type||Periodical, Internet resource|
|Document type||Journal / Magazine / Newspaper, Internet Resource|
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- Publisher last contacted on 23/04/2014
Publications in this journal
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ABSTRACT: The crystal structure of a specimen of `Pb-rich' chabournéite from Jas Roux, Hautes-Alpes, France, with the chemical formula obtained by electron microprobe analysis of Ag0.04 (1)Tl2.15 (2)Pb0.64 (1)Sb5.12 (1)As5.05 (1)S17.32 (5), has been solved by X-ray single-crystal diffraction on the basis of 36 550 observed reflections (with Fo > 4σFo) with a final R1 = 0.074. Pb-rich chabournéite is triclinic P1, with unit-cell parameters a = 8.5197 (4), b = 42.461 (2), c = 16.293 (8) Å, α = 83.351 (2), β = 90.958 (2), γ = 84.275 (2)°, V = 5823 (3) Å(3). Its structural formula is close to [Tl2(Pb0.8Tl0.1Sb1.1)](Sb4.1As4.9)S17, with Z = 8. Its crystal structure is formed by the alternation of two pairs of slabs along the b axis, deriving from the SnS and PbS archetypes, respectively. 104 independent cation sites and 136 S sites occur in the unit cell. Slab interfaces show the alternation, along c, of Tl sites, ninefold coordinated, with Pb, Sb or mixed/split (Pb,Sb) and (Pb,Tl) sites. Within the slabs, 72 independent M(3+) sites (M(3+) = As, Sb) occur. Considering M(3+)-S bond distances shorter than 2.70 Å, MS3 triangular pyramidal groups are condensed according to various MmSn chain fragments (`polymers'). The solution of the crystal structure of chabournéite allows its comparison with the closely related homeotypes protochabournéite and dalnegroite.Acta Crystallographica Section B 02/2015; 71(1):81-88. DOI:10.1107/S2052520614028157
Acta Crystallographica Section B 05/2006; B62(3):411-416.
Acta Crystallographica Section B 01/2006;
Acta Crystallographica Section B 01/2005; E61:03017–03019.
Acta Crystallographica Section B 01/2003;
Article: Polymeric glutarate lanthanum(III)Acta Crystallographica Section B 01/2000; A56,s418.
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