Item talk:Q162853
From geokb
Mindat Short Description
A group of M2+-M3+-oxysalts (phosphates, arsenates, vanadates, sometimes also containing sulfate) where M2+ = Ca, Ba, Sr, Pb and M3+ = Al, Fe, Mn, ... (sometimes replaced by medium-small M2+ cations such as Zn2+, Fe2+, Cu2+). Named after the member bra...