中国各产地软玉的化学成分分析

详细信息

Chemical Composition Analysis of Nephrites from Different Localities in China

摘要: 软玉的主要化学成分是SiO₂, MgO和 CaO, 类质同象替代使其还含有少量的 FeO, K₂O, Na₂O和Al₂O₃等杂质成分。通过对中国各产地软玉晶体化学式的计算及化学成分之间相互关系的分析, 发现其平均化学成分与透闪石的理论值接近, 说明了软玉的主要矿物组成是透闪石。化学成分在一定程度上可以反映软玉的产地及品种特征, 尤其是Fe²⁺的类质同象替代使 w(FeO)成为区分软玉产地和品种的重要标志。
- 软玉 /
- 透闪石 /
- 化学成分 /
- 晶体化学式 /
- 产地 /
- 品种
Abstract: The main chemical compositions of nephrite are SiO₂, MgO and CaO, and the isomorphous replacement makes it contain a little amount of FeO, K₂O, Na₂O, Al₂O₃ and so on. By calculating crystal-chemical formulas and analyzing the relationships among the chemical compositions, It can be found that the average chemical compositions of nephrites from different localities in China are very close to theoretical value of tremolite. The result indicates that the main mineral of nephrite is tremolite. In addition, the chemical compositions can also reflect features of localities and the species to some extent. The isomorphous replacement of Fe²⁺ makes w(FeO) to be the important indicator for identifying the locality and species of nephrite.
- nephrite /
- tremolite /
- chemical composition /
- crystal-chemical formula /
- locality /
- species

[1]	唐延龄,陈葆章,蒋壬华.中国和阗玉[M].乌鲁木齐:新疆人民出版社,1994.
[2]	王实.中国宝玉石资源大全[M].北京:科学技术文献出版社,1999.
[3]	刘晶,崔文元.中国三个产地的软玉(透闪石玉)研究[J].宝石和宝石学杂志,2002,4(2):25—29.
[4]	邹天人,陈克僬.和田玉、玛纳斯碧玉和岫岩老玉的产地特征[J].岩石矿物学杂志,2002,(增刊):41-49.
[5]	王时麒,段体玉,郑姿姿.岫岩软玉(透闪石玉)的矿物岩石学特征及成矿模式[J].岩石矿物学杂志,2002,(增刊):79—90.
[6]	崔文元,杨富绪.和田玉(透闪石玉)的研究[J].岩石矿物学杂志,2002,(增刊):26—33.
[7]	孔蓓,邹进福,郑仙群.青海某地软玉的宝石学特征.矿产与地质,1997,(4):268—271.
[8]	钟华邦.梅岭玉地质特征及成因探讨[J].宝石和宝石学杂志,2002,4(1):39—43.