SULFOBORITE

noun

or sul·pho·bo·rite ˌsəlfəˈbōrˌīt, -ˈbȯˌrīt

( -s )

Etymology: German sulfoborit, from sulf- + bor at borate + -it -ite

: a mineral Mg 6 H 4 (BO 3 ) 4 (SO 4 ) 2 .7H 2 O consisting of hydrous acid sulfate and borate of magnesium