picromerite

例句：

1. 1.The mineral is used in the production of steel.
   这种矿物用于生产钢铁。
2. 2.The pyrochlore was found to have unique properties.
   这种磷铜矿被发现具有独特的性质。
3. 3. The mining company has been exploring for this rare mineral.
   这家矿业公司一直在寻找这种稀有的磷铜矿。