ˈal(y)əˌnīt noun
also al·um·ite ˈaləˌmīt
( -s )
Etymology: French alunite, from alun alum (from Latin alumen ) + -ite — more at ale
: a mineral consisting of a hydrous potassium aluminum sulfate K(AlO) 3 (SO 4 ) 2 .3H 2 O and occuring in massive form or in rhombohedral crystals