Dravite Bosi F, Lucchesi S European Journal of Mineralogy 16 (2004) 335-344 Crystal chemistry of the schorl-dravite series Note: Tourmaline TM65e Locality: Arendal, Norway _database_code_amcsd 0007048 15.9541 15.9541 7.2035 90 90 120 R3m atom x y z occ NaX 0 0 .23291 .677 CaX 0 0 .23291 .110 KX 0 0 .23291 .010 MgY .12369 .061845 .63416 .372 AlY .12369 .061845 .63416 .367 Fe2+Y .12369 .061845 .63416 .144 Fe3+Y .12369 .061845 .63416 .097 Ti4+Y .12369 .061845 .63416 .014 ZnY .12369 .061845 .63416 .003 Mn2+Y .12369 .061845 .63416 .002 V3+Y .12369 .061845 .63416 .002 AlZ .29806 .26168 .61130 .828 MgZ .29806 .26168 .61130 .162 Fe3+Z .29806 .26168 .61130 .010 SiT .19179 .18987 0 .993 AlT .19179 .18987 0 .007 B .10991 .21982 .45476 OH1W 0 0 .77320 .618 O1W 0 0 .77320 .362 F1W 0 0 .77320 .020 O2 .06095 .12190 .48548 OH3V .26414 .13207 .51073 O4 .09306 .18612 .07029 O5 .18431 .092155 .09162 O6 .19575 .18552 .77751 O7 .28498 .28473 .07904 O8 .20938 .27009 .44071