Abstract

A confined region of solid solution exists in BaS−In₂S₃ system of eutectic type with incongruent melting compounds of BaIn₂S₄ and Ba₂In₂S₅ composition based on the α modification of In₂S₃. Compounds BaIn₂S₄ and Ba₂In₂S₅ melt incongruently at 1330 and 1497 K, crystallize in rhombic syngony with unit cell parameters а = 2.181 nm, b = 2.165 nm, с = 1.311 nm (space group Fddd) and а = 1.317 nm, b = 1.272 nm, с = 1.178 nm (space group Pbca), respectively. Microhardness H = 2470 MPa for BaIn₂S₄ and 2250 MPa for Ba₂In₂S₅. Coordinates of BaIn₂S₄–In₂S₃ eutectics is 76 mol % In₂S₃, T_m = 1190 K. Solubility of BaS in α-In₂S₃ at 1070 K reaches 2 mol % BaS. Solubility of BaS in α-In₂S₃ decreases with temperature and becomes 1 mol % BaS at 870 K.

中文翻译：

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BaS–In 2 S 3系统中的相平衡

摘要

在共晶类型的BaS-In ₂ S ₃系统中存在固溶的受限区域，且基于In ₂ S ₃的α修饰，BaIn ₂ S ₄和Ba ₂ In ₂ S ₅组成的熔融化合物不一致。化合物BaIn ₂ S ₄和Ba ₂ In ₂ S ₅在1330和1497 K时熔融不均匀，在菱形同构中结晶，晶胞参数а= 2.181 nm，b = 2.165 nm，с = 1.311 nm（空间群Fddd）和а= 1.317 nm，b = 1.272 nm，с  = 1.178 nm（空间群Pbca）。BaIn ₂ S _4的显微硬度H = 2470 MPa，Ba ₂ In ₂ S _5的显微硬度H = 2250 MPa 。贝恩的坐标₂小号₄ -In ₂小号_3个共晶体是76％（摩尔）在₂ s ^ ₃，Ť_米的α-在BAS中的= 1190 K.溶解度₂小号₃在1070 k达到2周％（摩尔）的BaS。在α-在BAS中的溶解度₂小号₃随温度降低而在870 K下变为1 mol％BaS。