SYNTHESIS AND CRYSTALLIZATION OF A NEW COMPOUND K2Te4O9·3H2O IN THE TeO2-K3PO4-H2O SYSTEM UNDER HYDROTHERMAL CONDITIONS | Zendy

Jia Shouquan | Zendy; Jiang Pei-zhi | Zendy; Fan Xian-he | Zendy; Hongda Niu | Zendy; Li De-zhen | Zendy

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SYNTHESIS AND CRYSTALLIZATION OF A NEW COMPOUND K2Te4O9·3H2O IN THE TeO2-K3PO4-H2O SYSTEM UNDER HYDROTHERMAL CONDITIONS

Author(s) -

Jia Shouquan,

Jiang Pei-zhi,

Fan Xian-he,

Hongda Niu,

Li De-zhen

Publication year - 1983

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.32.791

Subject(s) - crystallization , hydrothermal circulation , phase (matter) , materials science , crystal (programming language) , hydrothermal synthesis , trigonal crystal system , diffraction , crystal growth , crystallography , analytical chemistry (journal) , crystal structure , chemical engineering , chemistry , thermodynamics , physics , optics , chromatography , organic chemistry , computer science , engineering , programming language

We investigated preliminarilly the synthesis and crystallization in the system TeO2-K3PO4-H2O under hydrothermal conditions. It was found that in addition to the crystals of TeO2, crystals of a new phase which we called γ could be obtained in the given range of constituent and growth conditions. The γ crystal belongs to trigonal system with α= b=10.734 ?, c=21.041?, α=β=90°, γ=120°. The formula of γ is K2Te4O9·3H2O. Furthermore,it was shown that the crystallized product in the crystallization zone depends mainly on the molar ratio of starting materials k=TeO2/K3PO4 in the system. When k≤1.90, the crystallized phase only consists of γ crystals, k≥2.22, only TeO2 crystals appears, while 1.902 are present together.Finally, the DTA curve and the relative intensities and corresponding d-values of X-ray powder diffraction pattern of γ-phase are also given.

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