a mineral, sodium aluminum silicate, Na4Al3Si3O12Cl, occurring massive and in crystals, usually blue in color and found in certain alkali-rich igneous rocks.
Origin of sodalite
First recorded in 1800–10; soda
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for sodalite
Historical Examples of sodalite
These last consist of an intermixture of nepheline or sodalite and alkali-felspar.
Sodalite or hauyne may also be present, but nepheline is typically absent.
Many of them also contain nepheline, sodalite, hauyne and nosean; the much rarer mineral melilite appears also in some examples.
Section of sodalite crystal from the lava of 1794, with belonites and crystals of magnetite enclosed.
British Dictionary definitions for sodalite
a blue, grey, yellow, or colourless mineral consisting of sodium aluminium silicate and sodium chloride in cubic crystalline form. It occurs in basic igneous rocks. Formula: Na 4 Al 3 Si 3 O 12 Cl
Word Origin for sodalite
C19: from soda + -lite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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