pyroxene group
nounDefinition of pyroxene group
: a group of silicate minerals closely related in crystal form and having the general formula ABSi2O6 where A represents usually Ca or Na and B is usually Mg, Fe, or Al that includes the orthorhombic species enstatite and hypersthene and several monoclinic species (as diopside, spodumene, jadeite, acmite, and augite)