Huntite is a carbonate mineral with the chemical formula Mg3Ca4. Huntite crystallizes in the trigonal system and typically occurs as platy crystals and powdery masses. For most of recorded history its

Aluminium hydroxide, Al3, is a white chemical compound that is found as the mineral gibbsite and its three much rarer polymorphs: bayerite, doyleite, and nordstrandite. Aluminium hydroxide is amphoter