Pyrite—a mineral (“fool’s gold”) composed of iron sulfide: FeS₂
Pyroxene—a silicate mineral containing two metal oxides: CaMgSi₂O₆,
CaFeSi₂O₆, (Mg,Fe)SiO₃
Acid Rain and Our Nation's Capital: A Guide to Effects on Buildings and Monuments · 第 26 / 32 题