Abstract

In the range 250–400°C, the Cs2O–In2O3–P2O5(H2O) system contains the triphosphate CsInHP3O10and cyclododecaphosphate Cs3In3P12O36 . The phase relations in this system are similar to those in the analogous Fe and Ga systems, but the transformation of CsInHP3O10into Cs3In3P12O36is much slower. The monoclinic cell parameters in CsInHP3O10are a= 12.054 A, b= 8.936 A, c= 9.432 A, β = 111.77° (sp. gr. C2/c). The structure of Cs3In3P12O36 , determined by single-crystal techniques, is cubic (sp. gr. Pa3¯), with a= 14.885 A.

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