磷灰石
硅酸盐
原硅酸盐
材料科学
稀土
化学计量学
晶体结构
氧气
硅酸盐矿物
晶体化学
相(物质)
Crystal(编程语言)
化学工程
矿物学
天体生物学
冶金
纳米技术
物理化学
结晶学
化学
正硅酸乙酯
有机化学
计算机科学
程序设计语言
工程类
物理
作者
Kiyoshi Kobayashi,Yoshio Sakka
出处
期刊:Journal of the Ceramic Society of Japan
[Ceramic Society of Japan]
日期:2014-01-01
卷期号:122 (1428): 649-663
被引量:22
标识
DOI:10.2109/jcersj2.122.649
摘要
Rudimental research progress of oxyapatite-type rare-earth silicates is reviewed based on the published papers mainly from 1959 to 1993 that have not yet been discussed in detail. The knowledge of oxyapatite-type rare-earth silicates significantly increased during this period. Chemical compounds of rare-earth oxides and silica were discovered around 1960. Because of the complex chemical composition of the oxyapatite phase, the composition was initially considered as 2RE2O3·3SiO2, which was called orthosilicate. “RE” is the rare-earth elements. Different compositions of 2RE2O3·3SiO2 have been proposed by crystal structure analysis based on the crystal chemistry and the leaping model. With respect to crystal structure analysis, knowledge has gradually improved step-by-step, including the implicit distinction between oxygen-stoichiometric apatite and oxygen-deficient apatite. Based on the published work, the rare-earth silicate oxyapatites are considered to have an apatite-like structure. Initially, application research focused on the optical properties of oxyapatite because rare-earth metals were constituent elements of the crystals, and on the use of oxyapatite as a stabilizer of unwanted radioactive waste produced in nuclear power reactors because oxyapatites can dissolve the actinide elements.
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