gismondite
noun
gis·mon·dite
| \ jizˈmänˌdīt, ˈjizmən-\
variants:
or gismondine \ -ˌdēn \
plural -s
Definition of gismondite
: a mineral CaAl2Si2O8.4H2O consisting of a light-colored hydrous calcium aluminum silicate occurring in pyramidal crystals
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