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Named for the alkaline silicate composition.
Etymology from Wiktionary, CC BY-SA 4.0.
sodalite
Today it means: A mineral of alkaline igneous and plutonic rocks that are low in silica, of the chemical composition of sodium aluminum silicate with chlorine, Na₄Al₃Si₃O₁₂Cl. Pink sodalite is sometimes called hackmanite. Sodalite and lazurite form the sodalite Group of silicate minerals. Full definition →