马鞍山绿松石的热相变过程  

THERMAL PHASE TRANSFORMATION OF TURQUOISE

作　　者：郭克礼[1] 卢保奇[1] 夏义本[1] 亓利剑[2] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]中国地质大学珠宝学院,武汉430074

出　　处：《硅酸盐学报》2010年第4期694-699,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(20575061);上海市教育委员会发展基金(03AK23)资助项目

摘　　要：利用差热分析、红外吸收光谱、Raman光谱和X射线粉晶衍射分析方法,对安徽马鞍山具磷灰石假象绿松石热相变的过程和最终产物进行了研究。结果表明假象绿松石的热相变可以分为6个阶段:100～200℃为假象绿松石吸附水脱失阶段;250～330℃为假象绿松石羟基和晶格水分子脱失阶段;330～750℃为非晶态物相阶段;750℃为新物相的形成阶段;750～1200℃为具有鳞石英结构磷酸铝的形成阶段;1200℃为磷酸铝的结晶有序度明显增加。The process and product of thermal phase transformation of the apatite pseudomorphic turquoise from maanshan,Anhui province were analyzed by differential thermal analysis,infrared spectra and Raman spectrum and X-ray powder diffraction.The results indicate that the thermal phase transformation can be divided into six stages：the removal of the absorption water in the range of 100–200 ℃;the release of the hydroxyl and lattice water in the range of 250–330 ℃;the formation of non-crystalline structure in the range of 330–750 ℃;the formation of a new phase at 750 ℃;the generation of aluminum phosphate with tridymite structure in the range of 750–1200 ℃.The increase of the degree of crystalline order of aluminum phosphate increases at 1200 ℃.

关 键 词：绿松石 差热分析 RAMAN光谱 红外光谱 热相变 

分 类 号：P619.28[天文地球—矿床学]