Definitions | sodalite |
| noun
- (mineralogy) A mineral of alkaline igneous and plutonic rocks that are low in silica. Pink sodalite is sometimes called hackmanite. Sodalite and lazurite form the sodalite Group of silicate minerals.
- Chemical composition: Sodium aluminum silicate with chlorine, <math>Na_4Al_3Si_3O_{12}Cl</math>
Etymology: Named for the alkaline silicate composition.
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