1 laumonite | Definition of laumonite
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laumontite

noun
lau·​mont·​ite
variants: or less commonly laumonite or lomonite \ lƍˈmĂ€n(t‧)ˌīt \
plural -s

Definition of laumontite

: a white monoclinic mineral CaAl2Si4O12.4H2O consisting of a hydrous calcium and aluminum silicate and having a vitreous luster that upon exposure to the air loses water, becomes opaque, and crumbles

History and Etymology for laumontite

laumontite, laumonite alteration of lomonite, irregular from F. P. N. G. de Laumont †1834 French mineralogist + English -ite

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