Calcium oxalate

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What Wikipedia says

Calcium oxalate (in archaic terminology, oxalate of lime) is a calcium salt of oxalic acid with the chemical formula CaC2O4 or Ca(COO)2. It forms hydrates CaC2O4·nH2O, where n varies from 1 to 3. Anhydrous and all hydrated forms are colorless or white.

Excerpt from the Wikipedia article “Calcium oxalate”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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