- a whitish or grayish mineral, potassium aluminum silicate, KAlSi2O6, found in alkali volcanic rocks.
Origin of leucite
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Examples from the Web for leucite
In the lava of 1848 leucite was found to reach 44.9 per cent.
Section of leucite crystal from the lava of 1868, with fluid cavities.
Leucite, lū′sīt, n. a whitish mineral occurring only in volcanic rocks.
Nepheline appears to decrease in amount as leucite increases.
The flows from Kibo include nepheline and leucite basanite lavas rich in soda felspars.
- a grey or white mineral consisting of potassium aluminium silicate: a source of potash for fertilizers and of aluminium. Formula: KAlSi 2 O 6
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012