n. - A mineral of the feldspar family, triclinic in
crystallization, and in composition a silicate of alumina and soda. It
is a common constituent of granite and of various igneous rocks. See
Feldspar.
n. - A mineral of the feldspar family, triclinic in
crystallization, and in composition a silicate of alumina and soda. It
is a common constituent of granite and of various igneous rocks. See
Feldspar.