Double cyclohexaphosphates of cesium and divalent metalsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The double cyclohexaphosphates Cs2Mg2P6O18 (forms I and II) and Cs2Zn2P6O18 (II) are prepared by reacting Cs2CO3 and MgO or ZnO in molten polyphosphoric acids in the presence of Ln(2)O(3) (Ln=Lu,Yb) or V2O5 at 250-350degreesC. Their structures and lattice parameters are determined. Cs2Mg2P6O18-I:a=18.243 Angstrom, b=12.023 Angstrom, c=12.021 Angstrom, beta=96.86degrees, sp. cyr. Pc; Cs2Mg2P6O18-II:a=12.042 Angstrom, sp. gr. P2(1)3; Cs2Zn2P6O18: a=12.023 Angstrom, sp. gr. P2(1)3. Yb and Lu do not form mixed-cation phosphates with Cs, Mg, or Zn but are favorable for cyclization and the formation of the double cyclohexaphosphates Cs2Mg2P6O18 and Cs2Zn2P6O18.