Minerals identify

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Banalsite

Tectosilicate

Banalsite is a rare barium silicate mineral with formula: BaNa2Al4Si4O16. Banalsite is a tectosilicate group.

Banalsite and its strontium (SrNa2Al4Si4O16), constitute a complete solid solution series. In addition limited solid solution with calcium : CaNa2Al4Si4O16.

It was first described in 1944 for an occurrence in the Benallt Mine, Rhiw, Llanfaelrhys, Lleyn Peninsula (Caernarvonshire), Wales The name is derived from the chemical symbols of its composition. It has also been reported from Långban and from the Kalahari , South Africa It has recently been reported from the nepheline syenites of the Zhidoy massif , Russia; the Prairie Lake complex of alkaline rocks and carbonatites , Superior Alkaline Province, northwestern Ontario peralkaline complex, South Africa; the Sakharjok alkaline complex in the Kola Alkaline Province , Kola Peninsula of northwestern Russia (the Gremyakha–Vyrmes peralkaline complex, and the Turiy Mys complex of ultramafic–alkaline rocks and carbonatites).

Identification

Color of mineral

White

Mohs scale ( mineral hardness )

6.5

Density ( specific gravity )

1.57
1.571
1.578

Luster ( interacts light )

Vitreous
Pearly

Crystal ( diaphaneity )

Orthorhombic