Revised Space Groups for Three Molybdenum(V) Phosphate Compounds

The space groups of three previously described Mo(V) phosphate structures are revised. (1) δ-KMo_2P_3O_(13), originally reported as triclinic, P1, is revised to monoclinic, C2/c; it is identical to the compound previously identified as K_4Mo_8P_(12)O_(52). (2) The compound formulated as [Mo_(12)CdP_8O_(50)(OH)_(12)]Cd [N(CH_3)_4]_2(H_3O)_6·5H_2O, originally described as monoclinic, Pn, is revised to P2_1/n (also monoclinic). (3) Rb_3O_2(MoO)_4(PO_4)_4, originally reported as orthorhombic, C2221, is revised to tetragonal, P4_32_12. The general descriptions of the structures are unchanged; however, for compound 2 the revision involves the addition of a center of symmetry and, as a result, there are significant changes in the interatomic distances and angles.