AM_Dravite_8 Formula: Ca.368 Na.471 K.029 Al5.439 Mg2.292 Fe1.158 Ti.033 Li.018 Mn.012 Si6 B3 O30.505 F.495 H3.02 Name: Dravite Unit cell: 15.965 15.965 7.199 90.0 90.0 120.0 , V=1589.06 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 #32008