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The structure of M' YTaO4 has been redetermined and was refined to an R value of 0.034. M' YTaO4 crystallizes in P2/a symmetry with a = 5.298 (1), b = 5.451(1), c = 5.111(1)/~, fl = 96.45 deg. At temperatures > 1450~ M' YTaO4 will convert by way of a reconstructive transformation into the I41/a symmetry of scheelite, and, upon cooling, a second-order ferroelastic transi-) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.129.115.40 Downloaded on 2014-06-28 to IP

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