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A triclinic polymorph of dicadmium divanadate(V).

ABSTRACT: The title compound, Cd2V2O7, was obtained under hydro-thermal conditions. Different from the known monoclinic form, the new polymorph of Cd2V2O7 has triclinic symmetry and is isotypic with Ca2V2O7. The building units of the crystal structure are two Cd(2+) cations, with coordination numbers of six and seven, and two V atoms with a tetra-hedral and a significantly distorted trigonal-pyramidal coordination environment, respectively. Two VO5 pyramids share an edge and each pyramid is connected to one VO4 tetra-hedron via a corner atom, forming an isolated V4O14 (8-) anion. These anions are arranged in sheets parallel to (-211) and are linked through the Cd(2+) cations into a three-dimensional framework structure.

SUBMITTER: Ould Saleck A

PROVIDER: S-EPMC3884238 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature

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A triclinic polymorph of dicadmium divanadate(V).

Ould Saleck Ahmed A Assani Abderrazzak A Saadi Mohamed M El Ammari Lahcen L

Acta crystallographica. Section E, Structure reports online 20131026 Pt 11

The title compound, Cd2V2O7, was obtained under hydro-thermal conditions. Different from the known monoclinic form, the new polymorph of Cd2V2O7 has triclinic symmetry and is isotypic with Ca2V2O7. The building units of the crystal structure are two Cd(2+) cations, with coordination numbers of six and seven, and two V atoms with a tetra-hedral and a significantly distorted trigonal-pyramidal coordination environment, respectively. Two VO5 pyramids share an edge and each pyramid is connected to o ...[more]

PMID: 24454014

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