aluminite Min.
(əˈl(j)uːmɪnaɪt)
[mod. (Ger. aluminit 1807) f. L. alūmin- alum + -ite min. form.]
An opaque, whitish mineral, a native hydrosulphate of alumina, called also websterite1.
| 1868 Watts Dict. Chem. (1871) V. 579 The tribasic sulphate [of aluminium], 3Al2O3.SO3.9H2O, occurs native as aluminite, a white, opaque earthy mineral. |