Calcium Metatungstate chemical formula (Calcium Metatungstate) Ca3H4[H2(W2O7)6]•27H2O or CaO•4WO3•10H2O. The molecular weight of calcium metatungstate is 3500.96. Calcium metatungstate is a colorless triclinic or quasi-tetragonal crystal. After calcium metatungstate loses 7 molecules of crystal water, the melting point of the salt is 105°C, and it can lose 10 molecules of crystal water when burned, and it decomposes when it meets alkali. Calcium metatungstate preparation method: soak hot metatungstic acid and calcium carbonate together, evaporate the liquid, thicken it and crystallize it on sulfuric acid.
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