出典:Wikipedia
出典:『Wikipedia』 (2011/05/18 04:03 UTC 版)
Calcium oxalate (in archaic terminology, oxalate of lime) is a chemical compound that forms needle-shaped crystals, known in plants as raphides. A major constituent of human kidney stones, the chemical is also found in beerstone, a scale that forms on containers used in breweries. Its chemical formula is CaC2O4 or Ca (COO)2.