CRYSTALLOGRAPHIC ANALYSIS OF SULFIDES RELATED TO BISMUTHINITE Bi2S3
S.V. Borisov, S.A. Magarill, N.V. Pervukhina
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: кристаллографический анализ, сульфиды, псевдотетрагональный катионный каркас, псевдогексагональный анионный каркас, семейство висмутинит BiS-аикинит CuPbBiS, катионные и анионные подрешетки, связь симметрия-состав, crystallographic analysis, sulfides, pseudo-tetragonal cation framework, pseudo-hexagonal anion, bismuthinite BiS-aikinite CuPbBiS family, cation and anion sublattices, symmetry-composition relationship
Abstract
The crystallographic analysis of Bi2S3, CuPbBi5S9, CuPbBi3S6, CuPbBiS3 compounds, representing a series with a successive replacement of a part of Bi atoms by Pb+Cu shows that they are characterized by a stable combination of a pseudo-tetragonal cation framework with a pseudo-hexagonal anion one, which is common for all structures, within orthorhombic unit cells with n sizes of 11.2 , 4, and 11.5. The Bi2S3 cation framework is retained for heavy Bi+Pb, and additional light Cu fill the available vacant sites without changing its geometry but varying the crystallographic symmetry within the orthorhombic crystal symmetry and unit cells of n standard blocks (11,2x4x11,5 Å3).
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