【摘要】 在常温常压下由溴氧化镧与水蒸汽反应合成了溴氢氧化镧,用示差热分析和热失重分析方法研究了溴氢氧化镧的热分解过程——在空气中于360—405℃,在氮气流中于315—347℃热分解,脱水后生成溴氧化镧。用粉末X射线衍射确定了本实验所合成的溴氢氧化镧（La（OH）₂Br）的晶体结构,是斜方晶系,α=8.9064,6=13.024,c=5.5630。讨论了溴氢氧化镧的有关化学性质。更多还原

【Abstract】 The lanthanum hydroxide bromide,La(OH) 2Br, has been synthesised by the reaction of lanthanum oxybromide with water vapor under ordinary temperature and pressure.LaOBr + H2O(vapor) = La (OH) 2BrThe thermal decomposition process and crystal structure of the La(OH)2Br have been investigated by using D.T.A., T.G.A. and X-ray diffraction methods. The La(OH)2Br decomposes thermally at 360-405°C in air and at 315-347°C under nitrogen stream to form lanthanum oxybromide and water.La(OH)2Br = LaOBr + H2O |The X-ray diffraction data of the La(OH)2Br have been indexed on a orthorhombic system. The refined ^lattice parameters are a = 8.9064A, b = 13.024A, c = 5.5630A. Some chemical properties of the La(OH)2Br are discussed.更多还原