AM_Dravite_7 Formula: Ca.061 Na.626 K.031 Al6.318 Mg1.734 Fe.789 Ti.123 V.009 Li.006 Cr.006 Mn.006 Si6 B3 O30.669 F.331 H2.682 Name: Dravite Unit cell: 15.945 15.945 7.169 90.0 90.0 120.0 , V=1578.48 Space group: R3M (160)

Bloodaxe E S , Hughes J M , Dyar M D , Grew E S , Guidotti C V , American Mineralogist , 84 (1999) p.922-928, Linking structure and chemistry in the schorl-dravite series, Sample Ru-T18-92