Crystal growth of BiVO4 from the K−Bi−V−Mo−O molten system
DOI:
https://doi.org/10.15407/dopovidi2014.05.116Keywords:
Crystal growth of BiVO4, K−Bi−V−Mo−O molten systemAbstract
The synthetic conditions of BiVO4 under the crystallization from the molten system of K−Bi−V−Mo−O at the ratios of the starting components V/Mo = 0.50 – 6.00 and K/(V + Mo) = 0.55 – 2.00 with fixed to 10% (mol.) content of Bi2O3 are optimized. The compound crystallizes in the monoclinic system, space group I2/a, with unit cell parameters: a = 0.5195(2), b = 1.1701(1), c = 0.5092(3) nm; β= 90.38(1)º ; Z = 4, possessing the scheelite-related structure. The crystallization fields of K3Bi2(VO4)3 and K5Bi(MoO4)4 under these conditions of synthesis have been determined. It is shown that the application of molybdate melts can be successfully used for the control over the morphology and the structure of monoclinic BiVO4.
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