Barytocalcite is an anhydrous barium calcium carbonate mineral with the chemical formula BaCa2. It is trimorphous with alstonite and paralstonite, that is to say the three minerals have the same formu

Fluorite is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncomm