Phase Diagram of Binary Systems ErCl3-MCln (M=Li, Ca, Pb; n=1 or 2)

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (7): 992.

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Phase Diagram of Binary Systems ErCl₃-MCl_n (M=Li, Ca, Pb; n=1 or 2)

ZHENG Chao-Gui, HUANG Shou-Lin, WANG Si-Qiang

Department of Chemistry, Peking University, Beijing, 100871

Received:1992-10-05 Revised:1993-01-30 Online:1993-07-24 Published:1993-07-24

Abstract

Abstract: The phase diagram of binary systems ErCl₃-MCl_n(M=Li, Ca, Pb; n=1 or 2) were investigated by means of DTAand X-ray diffraction analysis.It was found that ErCl₃-LiCl system is of peritectic type with compound Li₃ErCl₆ and its phase transition at 466℃ as well as the invariant points e 40.0 mol(%) ErCl₃(479℃) and p 31.0 mol(%) ErCl₃(522℃).ErCl₃-CaCl₂ and ErCl₃-PbCl₂ systems are of the simple eutectic type with eutectic points 46.0 mol(%) ErCl₃(578℃) and 38.0 mol (%) ErCl₃(405℃) respectively.An unstable compound, formed in the solid state, is PbErCl₅ and decomposes at 356℃.Some rules of phase diagram were explored.

Key words: ErCl₃, ErCl₃-LiCl, ErCl₃-CaCl₂, ErCl₃-PbCl₂, Phase diagram

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ZHENG Chao-Gui, HUANG Shou-Lin, WANG Si-Qiang. Phase Diagram of Binary Systems ErCl₃-MCl_n (M=Li, Ca, Pb; n=1 or 2)[J]. Chem. J. Chinese Universities, 1993, 14(7): 992.

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Phase Diagram of Binary Systems ErCl₃-MCl_n (M=Li, Ca, Pb; n=1 or 2)

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