However, contrary to literature reports, the synthesis of the brownmillerite phase was not straight forward.
The calcium aluminum oxide phases slowly disappear over the next 72 hours until brownmillerite was the only product.
The brownmillerite phase was then analyzed for crystallinity using the Rietveld method.
His index of species lists such less-than-common minerals as barytolam-prophyllite, brownmillerite
, cuprorivaite, hannebachite, jasmundite, tangeite, and (ahem) willhendersonite.