Dravite Bosi F, Lucchesi S European Journal of Mineralogy 16 (2004) 335-344 Crystal chemistry of the schorl-dravite series Note: Tourmaline TM233g Locality: Zillerthal, Tyrol, Austria _database_code_amcsd 0007044 15.9355 15.9355 7.2002 90 90 120 R3m atom x y z occ NaX 0 0 .23279 .714 CaX 0 0 .23279 .099 KX 0 0 .23279 .004 AlY .12397 .061985 .63449 .433 MgY .12397 .061985 .63449 .409 Fe2+Y .12397 .061985 .63449 .110 Fe3+Y .12397 .061985 .63449 .030 Ti4+Y .12397 .061985 .63449 .013 ZnY .12397 .061985 .63449 .004 V3+Y .12397 .061985 .63449 .001 AlZ .29790 .26155 .61123 .835 MgZ .29790 .26155 .61123 .154 Fe3+Z .29790 .26155 .61123 .011 SiT .19179 .18985 0 .987 AlT .19179 .18985 0 .013 B .10974 .21948 .45483 OH1W 0 0 .77236 .633 O1W 0 0 .77236 .362 F1W 0 0 .77236 .004 O2 .06076 .12152 .48718 OH3V .26322 .13161 .51086 O4 .09314 .18628 .07098 O5 .18401 .092005 .09226 O6 .19531 .18495 .77724 O7 .28517 .28492 .07881 O8 .20924 .26989 .44054