fiedlerite

例句：

1. 1.The iron-rich soil of the region is ideal for growing crops like wheat and rice.
   该地区富含铁的土壤非常适合种植小麦和水稻等作物。
2. 2. The ferrihydrite in the soil acts as a natural water purifier.
   土壤中的铁矾石作为天然的水净化剂。
3. 3. Kainite is a mineral found in some volcanic rocks, known for its ability to store large amounts of hydrogen.
   卡宁石是一种存在于某些火山岩石中的矿物，因其能储存大量氢气而闻名。