orthoclase

柯林斯词典

orthoclase /ˈɔːθəʊˌkleɪs, -ˌkleɪz/

• 1. N a white to pale yellow, red, or green mineral of the feldspar group, found in igneous, sedimentary, and metamorphic rocks. It is used in the manufacture of glass and ceramics. Composition: potassium aluminium silicate. Formula: KAlSi3O8. Crystal structure: monoclinic 正長石

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