gismondite
noun
gis·mon·dite
jizˈmänˌdīt,
ˈjizmən-
variants or gismondine
-ˌdēn
plural -s
: a mineral CaAl2Si2O8.4H2O consisting of a light-colored hydrous calcium aluminum silicate occurring in pyramidal crystals
Word History
Etymology
gismondite from gismondine + -ite; gismondine from German gismondin, from C. G. Gismondi †1824 Italian mineralogist + German -in -ine