Mixed-cation cyclohexaphosphates: Synthesis and crystal structure of CsCuInP6O18-II

The cyclohexaphosphates CsM2+AlP6O18 (M2+ = Ni, Cu, Co, Mn, Cd), CsM2+GaP6O 18 (M2+ = Ni, Cu, Mn, Cd), CsM2+VP6O18 (M2+ = Ni, Co), CsM2+FeP6O18 (M2+ = Ni, Cu, Co, Mn), CsM2+MnP6O18 (M2+ = Mg, Co), CsM2+InP6O18 (M2+ = Ni, Co) ( type I), CsCuInP6O18, CsCuVP6O18, CsNiMnP6O18 (type II), Cs3Cd3Fe(P6O18)(2) , Cs3Cu3Mn(P6O18)(2), Cs3Mn3In(P6O18)(2), and Cs3Cd3In(P6O18)(2) were prepa red by crystallization from molten polyphosphoric acids. The crystal struct ure of CsCuInP6O18-II was determined: triclinic cell, sp. gr. P(1) over bar , Z = 1, a = 5.1360 Angstrom, b = 8.917 Angstrom, c = 9.237 Angstrom, alpha = 86.98 degrees, beta = 75.04 degrees, gamma = 73.53 degrees.