A potassium aluminosilicate mineral, crystallizing in the tetrahedral system and typically found as grey or white glassy trapezohedra in volcanic rocks.
- The three commonest feldspathoids are leucite, nepheline, and sodalite.
- Additionally, lamproites may contain leucite, richterite, sanidine, and occasionally nepheline, whereas kimberlites do not.
- Familiar examples include nepheline, leucite, and members of the sodalite and cancrinite groups.
Late 18th century: from Greek leukos 'white' + -ite1.
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Line breaks: leu|cite
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