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Synthesis and crystal structure of the pyrovanadate Na2ZnV2O7

Published online by Cambridge University Press:  01 March 2012

Alexander P. Tyutyunnik
Affiliation:
Institute of Solid State Chemistry, Ural Branch of Russian Academy of Sciences, Ekaterinburg GSP-145, 620219 Russia
Vladimir G. Zubkov
Affiliation:
Institute of Solid State Chemistry, Ural Branch of Russian Academy of Sciences, Ekaterinburg GSP-145, 620219 Russia
Ludmila L. Surat
Affiliation:
Institute of Solid State Chemistry, Ural Branch of Russian Academy of Sciences, Ekaterinburg GSP-145, 620219 Russia
Boris V. Slobodin
Affiliation:
Institute of Solid State Chemistry, Ural Branch of Russian Academy of Sciences, Ekaterinburg GSP-145, 620219 Russia
Gunnar Svensson*
Affiliation:
Department of Structural Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
*
a)Author to whom correspondence should be addressed. Electronic mail: gunnar@struc.su.se

Abstract

The compound Na2ZnV2O7 with an åkermanite-type structure has been synthesized. It has a tetragonal unit cell, a=8.2711(4), c=5.1132(2) Å, and crystallizes with P-421m symmetry, Z=2. Its crystal structure has been refined from a combination of X-ray and neutron powder diffraction data. The structure contains layers of corner-sharing VO4 and ZnO4 tetrahedra, the former in pairs forming pyrovanadate V2O7 units. The sodium atoms are positioned between the layers, with a distorted antiprismatic coordination of oxygen atoms.

Type
Technical Articles
Copyright
Copyright © Cambridge University Press 2005

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