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

ABSTRACT: 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 tetra-hedral and trigonal-pyramidal configurations, respectively. In the crystal structure, (001) layers of metal cations alternate with layers of TeO₃^2- and CrO₄^2- 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.

SUBMITTER: Weil M

PROVIDER: S-EPMC5458308 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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

Weil Matthias M

Acta crystallographica. Section E, Crystallographic communications 20170516 Pt 6

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 ...[more]

PMID: 28638643

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