It occurs only in igneous rocks, particularly potassium-rich, silica-poor, recent lavas. Some important localities include Rome; Uganda; and Leucite Hills, Wyo., U.S. Leucite is used as a fertilizer in Italy (because of its high potassium content) and as a source of commercial alum.

Where can I find sodalite?

The Ice River complex, near Golden, British Columbia, contains sodalite. Smaller deposits are found in South America (Brazil and Bolivia), Portugal, Romania, Burma and Russia. Hackmanite is found principally in Mont-Saint-Hilaire and Greenland.

Is Leucite a rock or mineral?

Leucitite is a volcanic rock, strongly undersaturated with respect to silica, in which leucite is the sole or dominant felsic mineral (feldspars do not exceed 10 modal per cent).