JOURNAL of the Tunisian Chemical Society

serving the Research, the Education and the Industry

Study of the solid-liquid equilibrium of the LiPO3 - Be(PO3)2 systems; NaPO3 - Be(PO3)2 and KPO3 - Be(PO3)2

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Study of MrPO3 - Be(PO3)2 systems where Mr = Li, Na, K, with D.T.A. technique shows the existence of five compounds :
LiBe(PO3)3, Na4Be(PO3)6, NaBe(PO3)3, K2Be(PO3)4 and KBe(PO3)3 ; only Na4Be(PO3)6 is melting congruently. The chemical preparation and crystal data of these new compounds are given. The Weissenberg camera is used to determine the unit cell of LiBe(PO3)2 which is monoclinic: 
a: 14,713(4) A      b: 28,122 (5)A 
c: 10,075 (2) Å     ga: 97,12 (4) degrés 

K. Omezzine, N. Kbir-Ariguib. 

Pages 37-45

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