Study of the solid–liquid equilibria in the LiPO₃–Y(PO₃)₃ binary system

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• 作者：Jouini ; Anis ; Ferid ; Mokhtar ; Trabelsi-Ayadi ; Malika
• 关键词：Inorganic compounds ; Chemical synthesis ; X-ray diffraction
• 刊名：Materials Research Bulletin
• 出版年：2003
• 期刊代码：60_00255408
• 类别：ms
• 出版时间：February 20, 2003
• 卷：38
• 期：3
• 页码：437-443
• 文件大小：105 K

摘要

The LiPO₃–Y(PO₃)₃ system has been studied for the first time. Microdifferential thermal analysis (μ-DTA), infrared spectroscopy (IR) and X-ray diffraction were used to investigate the liquidus and solidus relations. The only new compound observed within this system is LiY(PO₃)₄, melting incongruently at 1104K. An eutectic appears at 4±1mol%Y(PO₃)₃ at 933K. LiY(PO₃)₄ crystallizes in the monoclinic system C_2/c with a unit cell: a=16.201(4)Å, b=7.013(2)Å, c=9.573(2)Å, β=125.589(9)°, Z=4 and V=884.5ų, which is isostructural to LiNd(PO₃)₄. The infrared absorption spectrum indicates that this salt is a chain polyphosphate.