goethite

a widely occurring iron oxide ore; a mixture of goethite and hematite and lepidocrocite.

一种常见的化石，是针、赤和纤的混合物。

The research shows that the FA-goethite coexistensive system is quite effectual in the way of controlling the heavy metal pollution of cadmium.

因此，针-里酸共存体系对于控制重金属镉污染具有较好的效果。