Plagioclase

Table of contents

1 Pronunciation 2 Etymology 3 noun 3.1 Plagioclase feldspar series 4 Related words

Pronunciation

plaj' ee o klaze

Etymology

plageo, Greek "oblique" + klao, Greek "I cleave"

noun

1. A group of feldspar minerals that form a solid solution series from Albite (sodium aluminum silicate) to Anorthite (calcium aluminum silicate). The plagioclase feldspars are found in igneous, plutonic, and metamorphic rocks. They all have the triclinic-pinacoidal crystal habit, but only Albite commonly occurs in well crystallized specimens.

Plagioclase feldspar series

1. Albite
2. Oligoclase
3. Andesine
4. Labradorite
5. Bytownite
6. Anorthite

Related words

See Rock, Mineral, Feldspar