In norites occurring in layered mafic intrusives, formed at high magmatic temperatures.
Valid Species (Pre-IMA) 1932
From the Rustenburg and Potgietersrust districts, Bushveld Complex, Transvaal, South Africa. Link to MinDat.org Location Data.
To honor Sir William Henry Bragg (1862-1942) and Professor William Lawrence Bragg (1890-1971), pioneers in the X-ray investigations of crystals, as this is the first new mineral to be discovered by X-ray methods alone.