[化] 水镁矾

[ noun ]
a white mineral consisting of hydrous magnesium sulfate often found in salt mines
<noun.substance>

Kieserite \Kie"ser*ite\, n. [Named after Prof. Kieser, of Jena.]
(Min.)
Hydrous sulphate of magnesia found at the salt mines of
Stassfurt, Prussian Saxony.