The crystal structure of vurroite, Pb20Sn2(Bi,As)(22)S51Cl6: OD-character, polytypism, twinning, and modular description
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The crystal structure of vurroite contains lozenge-shaped composite rods made of coordination polyhedra of Ph and Sn, interconnected into layers parallel to (010) of the standard monoclinic setting. These layers are separated by ribbons of As and Bi, each in distorted octahedral coordination. The ribbons form wavy, discontinuous double layers of PbS archetype. Lone electron pairs of As and Bi are accommodated in the central portions of the PbS-like layers. The structure of vurroite contains building blocks topologically similar to those found in the zinckenite group and in the structure of kirkiite. It can be considered a box-work structure containing the smallest possible pseudo-hexagonal block in the form of a sole octahedron.
Originalsprog | Engelsk |
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Tidsskrift | American Mineralogist |
Vol/bind | 93 |
Udgave nummer | 5-6 |
Sider (fra-til) | 713-727 |
ISSN | 0003-004X |
DOI | |
Status | Udgivet - 2008 |
- Det Natur- og Biovidenskabelige Fakultet
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ID: 8805225