LiAlPO₄(OH,F)

This sample of montebrasite is displayed in the Smithsonian Museum of Natural History. Montebrasite is a phosphate mineral which contains lithium and fluorine with the composition LiAlPO₄(OH,F). The sample at left is about 12x20 cm and is from Jenipapo district, Itinga, Minas Gerais, Brazil.

Montebrasite is the hydroxyl analog of amblygonite. It is known to produce enormous crystals.

The montebrasite sample at right is about 2 x 16 cm and is from Teofilo Otoni region, Minas Gerais, Brazil.

The montebrasite sample below is about 6 x 6 cm and is from Plumbago Mountain, Newry, Maine.