Crystal structure of dilead(II) oxochromate(VI) oxotellurate(IV)

Acta Crystallographica Section E: Crystallographic Communications

Weil, M.¹ 

[1] Institute for Chemical Technologies and Analytics, Division of Structural Chemistry, Vienna University of Technology, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria

关键词: CRYSTAL STRUCTURE;    LEAD;    OXOCHROMATE(VI);    OXOTELLURATE(IV);    ISOTYPISM;   

DOI  :  10.1107/S2056989017006995

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

Reaction of chromium(III) precursors with TeO2 in PbF2/PbO melts in air led to oxidation of chromium(III) to chromium(VI), whereas tellurium remained its oxidation state of IV. In the resulting title compound, Pb2(CrO4)(TeO3), the two types of anions are isolated from each other, hence a double salt is formed. The two independent Pb2+ cations exhibit coordination number nine under formation of very distorted coordination polyhedra [bond-length range = 2.363 (6)–3.276 (7) Å]. The oxochromate(VI) and oxotellurate(IV) anions have tetra­hedral and trigonal–pyramidal configurations, respectively. In the crystal structure, (001) layers of metal cations alternate with layers of TeO32− and CrO42− anions along [001], forming a three-dimensional framework structure. Pb2(CrO4)(TeO3) is isotypic with its sulfate analogue Pb2(SO4)(TeO3) and is comparatively discussed.

【 授权许可】

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