One of the mysteries of the English language finally explained.
A potassium aluminosilicate mineral, crystallizing in the tetrahedral system and typically found as grey or white glassy trapezohedra in volcanic rocks.
- ‘Familiar examples include nepheline, leucite, and members of the sodalite and cancrinite groups.’
- ‘The three commonest feldspathoids are leucite, nepheline, and sodalite.’
- ‘Geologic observations of this region were recorded as early as 1869 by the Hayden Survey, and by 1874 Endlich had reported leucite (later correctly identified as analcime) from Table Mountain.’
- ‘Additionally, lamproites may contain leucite, richterite, sanidine, and occasionally nepheline, whereas kimberlites do not.’
- ‘Early reports of leucite from this locality were shown to be an erroneous identification of analcime.’
Late 18th century: from Greek leukos ‘white’ + -ite.
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