出典:Wiktionary
epsomite (countable かつ uncountable, 複数形 epsomites)
出典:Wikipedia
出典:『Wikipedia』 (2011/03/18 05:14 UTC 版)
Epsomite is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O or simply MgSO4. Epsomite forms as encrustations or efflorescences on limestone cavern walls and mine timbers and walls, as a volcanic fumaroles, and as rare beds in evaporate layers. It was first systematically described in 1806 for an occurrence near Epsom, Surrey, England, for which it was named.