
1) Oxide mineral
Found on
https://www.crosswordclues.com/clue/brownmillerite

Brownmillerite is a rare oxide mineral with chemical formula is Ca2(Al,Fe)2O5. It is named for Lorrin Thomas Brownmiller (1902–1990), chief chemist of the Alpha Portland Cement Company, Easton, Pennsylvania. ==Discovery and occurrence== The chemical compound was first recognized in 1932 and named for the chemist who identified it. The naturally ...
Found on
http://en.wikipedia.org/wiki/Brownmillerite
No exact match found.