AM_Benitoite
Formula: Ba Ti Si3 O9
Name: Benitoite
Unit cell: 6.6 6.6 9.74 90.0 90.0 120.0 , V=367.43
Space group: P-6C2 (188)

Zachariasen W H , Zeitschrift fur Kristallographie , 74 (1930) p.139-146, The crystal structure of benitoite, BaTiSi3O9, Locality: Dallas Gem Mine, San Benito, Ca