Wiktionary
brockite
n. (context mineral English) A hexagonal-trapezohedral mineral containing calcium, cerium, hydrogen, oxygen, phosphorus, and thorium.
Wikipedia
Brockite
Brockite is a rare earth phosphate mineral with formula: (Ca,Th,Ce)PO·HO. It crystallizes in the hexagonal system. It is typically granular to massive with only rare occurrence of stubby crystals. It is radioactive due to the thorium content.
Usage examples of "brockite".
Had he contented himself with being merely a Brockite, he would have counted as nobody.