orthoclase

名词 orthoclase:

1. a white or colored monoclinic feldspar

or.tho.clase

n.（名词）
A variety of feldspar, essentially potassium aluminum silicate, KAlSi3O 8, characterized by a monoclinic crystalline structure and found in igneous or granitic rock. Also called potash feldspar
正长石：一种长石类，特别是钾、铝、硅合物，KAlSi3O 8，其特征为单颗晶体结构，发现于火山岩或花岗岩中 也作 potash feldspar

来源：
Greek ortho- [ortho-]
希腊语 ortho- [前缀，表.直的，正的.]
Greek klasis [a breaking] from klan [to break]
希腊语 klasis [分裂] 源自 klan [打破]