hauynite
noun
ha·uy·nite
äˈwēˌnīt
variants or hauyne
äˈwēn
plural -s
: an isometric silicate mineral (Na,Ca)4−8Al6Si6O24(SO4)1− consisting of sulfate of aluminum, calcium, and sodium and occurring commonly as rounded grains in various igneous rocks (hardness 5.5–6, specific gravity 2.4–2.5)
Word History
Etymology
hauynite from hauyne + -ite; hauyne from French haüyne, from Abbé René Just Haüy †1822 French mineralogist + French -ine