Laumontite

Lau´mont`ite

(Min.) A mineral, of a white color and vitreous luster. It is a hydrous silicate of alumina and lime. Exposed to the air, it loses water, becomes opaque, and crumbles.

laumontite

[lō′män‚tīt] (mineralogy) CaAl₂Si₄O₁₂·4H₂O A white zeolite mineral crystallizing in the monoclinic system; loses water on exposure to air, eventually becoming opaque and crumbling. Also known as laumonite; lomonite; lomontite.

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