Study of the solid-liquid equilibria in the LiPO3-Y(PO3)3 binary system |
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| Authors: | Anis Jouini Mokhtar FeridMalika Trabelsi-Ayadi |
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| Affiliation: | a Laboratoire des Procédés Chimiques, Institut National de Recherche Scientifique et Technique, B. P. 95 Hammam-Lif 2050, Tunisia
b Laboratoire de Physico-Chimie Minérale, Université du 7 Novembre à Carthage, Faculté des Sciences de Bizerte, 7021 Zarzouna, Bizerte, Tunisia |
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| Abstract: | 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 1104 K. An eutectic appears at 4±1 mol% Y(PO3)3 at 933 K. LiY(PO3)4 crystallizes in the monoclinic system C2/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=884.5 Å3, which is isostructural to LiNd(PO3)4. The infrared absorption spectrum indicates that this salt is a chain polyphosphate. |
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| Keywords: | Inorganic compounds Chemical synthesis X-ray diffraction |
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