sulfoborite
noun
sul·fo·bo·rite
variants or sulphoborite
ˌsəlfəˈbōrˌīt,
-ˈbȯˌrīt
plural -s
: a mineral Mg6H4(BO3)4(SO4)2.7H2O consisting of hydrous acid sulfate and borate of magnesium
Word History
Etymology
German sulfoborit, from sulf- + borat borate + -it -ite