AM_Dumortierite_5 Formula: Al6.61 Mg.12 Ti.09 Fe.02 Si2.83 B O17.991 F.009 H.849 Name: Dumortierite Unit cell: 4.6948 11.8037 20.2106 90.0 90.0 90.0 , V=1119.99 Space group: PNMA (62)

Fuchs Y , Ertl A , Hughes J M , Prowatke S , Brandstatter F , Schuster R , European Journal of Mineralogy , 17 (2005) p.173-183, Dumortierite from the Gfohl unit, Lower Austria: chemistry, structure,, and infra-red spectroscopy, Sample: DUM2, Locality: Gfohl unit, Lower Austria