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关于奥怀伊石的结构与孪晶的新观点：一种棒状多型体和双重超结构

A fresh view on the structure and twinning of owyheeite, a rod-polytype and twofold superstructure.

作者信息

Stöger Berthold, Göb Christian, Topa Dan

机构信息

X-ray Centre, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.

Rigaku Europe SE, Hugenottenallee 167, 63263 Neu-Isenburg, Germany.

出版信息

Acta Crystallogr B Struct Sci Cryst Eng Mater. 2023 Aug 1;79(Pt 4):271-280. doi: 10.1107/S2052520623004523. Epub 2023 Jun 24.

DOI:10.1107/S2052520623004523
PMID:37352122
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10410309/
Abstract

Owyheeite [CuAgPbSbS] crystallizes as a twofold superstructure with P2/n symmetry and pseudo-orthorhombic metrics [a = 8.1882 (3) Å, b = 27.2641 (7) Å, c = 22.8679 (7) Å, β = 90.293 (3)°, V = 5105.0 (3) Å, Z = 4]. Owyheeite is systematically twinned by reflection at (021) or equivalently (021). Twinning is explained by describing a simplified Pmcn archetype structure as polytype built of two kinds of rods, which contact via electron-pair micelles. A procedure of generating hypothetical polytypes by tiling space with partially overlapping equivalent regions is described.

摘要

奥怀伊矿[CuAgPbSbS]结晶为具有P2/n对称性和假正交晶系度量的双重超结构[a = 8.1882 (3) Å，b = 27.2641 (7) Å，c = 22.8679 (7) Å，β = 90.293 (3)°，V = 5105.0 (3) Å，Z = 4]。奥怀伊矿通过(021)或等效的(021)面的反射发生规则孪晶。孪晶是通过将简化的Pmcn原型结构描述为由两种棒状结构组成的多型体来解释的，这两种棒状结构通过电子对胶束接触。描述了一种通过用部分重叠的等效区域平铺空间来生成假设多型体的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/be574e458ca3/b-79-00271-fig15.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/be574e458ca3/b-79-00271-fig15.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/ceea0934eb04/b-79-00271-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/c52fe0ee7afe/b-79-00271-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/e146d8f687e5/b-79-00271-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/ad806bb0b2d6/b-79-00271-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/63522485ed9c/b-79-00271-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/4e6277c4d4c4/b-79-00271-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/9d2dd45eab6c/b-79-00271-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/8204d2d8462e/b-79-00271-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/b71af6ef840a/b-79-00271-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/82374ff33cca/b-79-00271-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/f87b0334f33d/b-79-00271-fig11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/f1f82b30fbaa/b-79-00271-fig12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/af743f291938/b-79-00271-fig13.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/52d030cb2efa/b-79-00271-fig14.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f04/10410309/be574e458ca3/b-79-00271-fig15.jpg

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