sanidine 的定义
Mineralogy.
- a glassy, often transparent variety of orthoclase in which sodium may replace as much as 50 percent of the potassium: forms phenocrysts in some igneous rocks.
更多sanidine例句
- All the upper part of the mountain is composed of a pumiceous tufa, rich in sanidine and of a characteristic greenish colour.
- Sanidine, san′i-din, n. a clear glassy variety of orthoclase.
- It is remarkable for the large crystals of sanidine (glassy felspar) which it contains, and has a rude columnar structure.
- (c.) Phonolite (Clinkstone) is a trachytic rock, composed essentially of sanidine, nepheline, and augite or hornblende.
- Trachyte from Hungary; felsitic paste with crystals of hornblende and sanidine, and a little magnetite.