摘要
长石是一族矿物的名称,从组分说有四种:钾长石、钠长石、钙长石、和钡长石。长石族有三个亚族:钾钠长石亚族,又名正长石亚族,由于阳离子是K、Na故又名碱性长石亚族,斜长石亚族和钡长石亚族。钾长石与钠长石,高温时可以形成完全类质同象,低温是不完全类质同象,它们的类质同象称碱性长石系列;钠长石和钙长石也可以形成类质同象,称斜长石系列。
The gem minerals of feldspar include: orthoclase, adularia, sanidine, microcline, amazonite, anorthoclose, albite, labradorite,oligoclase and jade albite. The authors made a description and preliminary study on optical character of every variety of feldspar, i.e. on chatoyinent, opalescence, iridescence, chatoyancy, starlight, etc..
出处
《吉林地质》
1989年第2期84-88,共5页
Jilin Geology
