Abstract

Crystals of the high temperature form of BaNb 2O 6 were grown from a BaB 2O 4 flux. The symmetry of the crystals is orthorhombic and the structure consists of a zigzag pattern of edge-sharing pairs of NbO 6-octahedra joined at corners at nearly 60° and 120° angles to produce rings of six octahedra. The barium atoms are situated in the cages formed by the rings. A comparison is made with the structures of other ANb 2O 6 and ATa 2O 6 type phases where A is Ba, Sr or Ca.

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