Crystal structure of dilead(II) oxochromate(VI) oxotellurate(IV)
Reaction of chromium(III) precursors with TeO(2) in PbF(2)/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, Pb(2)(CrO(4))(TeO(3)), the two types of anions are isolated from each other, hence a d...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2017
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5458308/ https://www.ncbi.nlm.nih.gov/pubmed/28638643 http://dx.doi.org/10.1107/S2056989017006995 |
Sumario: | Reaction of chromium(III) precursors with TeO(2) in PbF(2)/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, Pb(2)(CrO(4))(TeO(3)), the two types of anions are isolated from each other, hence a double salt is formed. The two independent Pb(2+) 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 TeO(3) (2−) and CrO(4) (2−) anions along [001], forming a three-dimensional framework structure. Pb(2)(CrO(4))(TeO(3)) is isotypic with its sulfate analogue Pb(2)(SO(4))(TeO(3)) and is comparatively discussed. |
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