apjohnite
noun
ap·john·ite
ˈapˌjäˌnīt
plural -s
: a mineral MnSO4·Al2(SO4)3·22H2O consisting of manganese aluminum sulfate containing water and occurring in crusts or fibrous masses
Word History
Etymology
German apjohnit, from James Apjohn †1886 Irish chemist who first examined it + German -it -ite