alunite used

Alunite: Alunite mineral information and data - ,

Alunite: Alunite mineral information and data - ,

Common member of the alunite supergroup The Al analogue of

Alunite - Wikipedia

Alunite - Wikipedia

Alunite is a hydrated aluminium potassium sulfate mineral, formula K Al 3 (S O 4) 2 (OH) 6 It was first observed in the 15th century at Tolfa, near Rome, where it is .