#45

#45

Iba2

Example – Banalsite, BaNa2Al4Si4O16

Named from a contraction of the component cation symbols: Ba, Na, Al, and Si. It belongs to the group of tectosilicates.

The crystal structure of stronalsite and a redetermination of the structure of banalsite.

Liferovich R P, Locock A J, Mitchell R H, Shpachenko A K
The Canadian Mineralogist 44 (2006) 533-546

http://webmineral.com/data/Banalsite.shtml

CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=06594.cif&down=cif

Banalsite

 

BaO10 irregular polyhedra (green)
NaO5 pentagonal pyramids (yellow)
AlO4 tetrahedra (blue)
SiO4 tetrahedra (orange)

3D rotatable model of Banalsite

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