Minerals identify

Know how to recognize them

Brownmillerite

Oxide mineral

Brownmillerite is a rare oxide mineral with chemical formula Ca2(Al,Fe)2O5. It is named for Lorrin Thomas Brownmiller (1902–1990), chief chemist of the Alpha Portland Cement Company, Easton, Pennsylvania.

Identification

Color of mineral

Red
Brown

Density ( specific gravity )

1.96
2.01
2.04

Crystal ( diaphaneity )

Orthorhombic