Minerals and Metals in Ancient India v2.c43.s3.t10.1
Minerals and Metals in Ancient India v2.c43.s3.t10.1
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v2.c43.s3.t10.1
RAlSi₃O₈ represents the general group of feldspar minerals where R may be potassium (partly replaced by sodium) in orthoclase and microcline, or sodium (partly replaced by calcium) in plagioclase.