a mineral consisting of potassium magnesium double sulphate; used as a fertilizer
langbeinite详细解释
lang.bein.ite n.（名词）An evaporite mineral, K2Mg 2(SO 4) 3, used as a source of potassium sulfate for fertilizer. 无水钾镁矾：蒸发岩矿石 ，K2Mg 2(SO 4) 3，是化肥用硫酸钾的原料 来源：After A. Langbein , 9th-century German chemist 源自A. 兰本 ，9世纪德国化学家
