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sodic amphibole group
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sodic amphibole group

mineralogy
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Quick Summary

The sodic amphibole group is a classification within the broader amphibole mineral group. Amphiboles are common rock-forming silicate minerals characterized by a double chain silicate structure. The sodic amphibole group specifically refers to amphiboles where sodium is a significant cation in the crystal structure.1

These minerals are found in various igneous and metamorphic rocks. Their complex chemical formulas allow for extensive substitution of different metal ions, leading to a wide range of compositions and appearances. While difficult to identify without chemical analysis, amphiboles are generally recognized by their prismatic crystal habit and characteristic cleavage angles of approximately 56° and 124°.1

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  1. amphibole group
  2. amphibole

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