AM_Dravite_6 Formula: Ca.017 Na.533 K.04 Al6.606 Mg1.242 Fe1.047 Ti.084 V.015 Si6 B3 O30.894 F.106 H3.041 Name: Dravite Unit cell: 15.935 15.935 7.164 90.0 90.0 120.0 , V=1575.40 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-T17-92