A new triple molibdates in the systems Cs2MoO4-R2(MoO4)3-Zr(MoO4)2 (R=Al, Cr, Fe, In, Sc, Bi)

The Cs2MoO4-R2(MoO4)3-Zr(MoO4)2 (R- Al, Cr, Fe, In, Sc, Bi) systems investigated in subsolidus region by X-ray diffraction method. Quasibinary cuts are revealed and the triangulation is carried out. The triple molibdates at molar ratio of initial components 5:1:2, 1:1:1 and 2:1:4 are received. A flux melt crystallization at spontaneous nucleation brings up crystals of triples molibdates of structures 5:1:2 - Cs5BiZr(MoO4)6 and 1:1:1 - Cs(AlZr0.5)(MoO4)3. The sizes of a trigonal elementary cell of structure Cs5BiZr(MoO4)6: a = b = 10.9569(2) Å, c = 39.804(4) Å, V = 4138.4(4) Å3, Z = 6, space group R`3c and compound Cs(AlZr0.5)(MoO4)3: a = 12.9441(2)Ǻ, c = 12.0457(4) Ǻ, V = 1747.86(7) Ǻ3, Z=6, space group R`3.