Phase Formation in the M₂OBaOV₂O₅
(M = Li, Na, K, Rb, Cs) Systems

L. L. Surat and B. V. Slobodin

Institute of Solid State Chemistry, Ural Division, Russian Academy of Sciences,
Pervomaiskaya ul. 91, Yekaterinburg, 620219 Russia

Received September 2, 2004

Abstract—The subsolidus interaction of the components in the M₂O–BaO–V₂O₅ (M = Li, Na, K, Rb, Cs) sys-
tems is studied. Seven double vanadates are discovered. Of them, five are synthesized for the first time:
M₃Ba(VO₃)₅ for M = K, Rb, or Cs and MBaVO₄ for M = Rb or Cs. The structural parameters of these com-
pounds are determined.

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