It occurs chiefly as stannic oxide , SnO 2 in cassiterite.主要以氧化物状态存在.One of the key problems in its origin is the solubility of cassiterite in granitic melt.锡石在花岗质熔体中的溶解度,是阐明花岗岩全岩型锡矿成因的关键....

n.锡石...

cassiterite的音标：cassiterite的英式发音音标为：[kə'sɪtəraɪt]cassiterite的美式发音音标为：[kə'sɪtəraɪt]...