Chromium-dravite Bosi F, Lucchesi S, Reznitskii L European Journal of Mineralogy 16 (2004) 345-352 Crystal chemistry of the dravite-chromdravite series Note: Tourmaline TMpr79f Locality: Sludyanka crystalline complex, Lake Baikal, Russia _database_code_amcsd 0007060 16.0204 16.0204 7.2985 90 90 120 R3m atom x y z occ Uiso NaX 0 0 .2251 .829 .0179 CaX 0 0 .2251 .097 .0179 KX 0 0 .2251 .014 .0179 CrY .12337 .061675 .63729 .766 .0044 MgY .12337 .061675 .63729 .158 .0044 V3+Y .12337 .061675 .63729 .049 .0044 Fe2+Y .12337 .061675 .63729 .014 .0044 Ti4+Y .12337 .061675 .63729 .010 .0044 ZnY .12337 .061675 .63729 .004 .0044 AlZ .29783 .26189 .60889 .444 .0053 MgZ .29783 .26189 .60889 .289 .0053 CrZ .29783 .26189 .60889 .267 .0053 SiT .19032 .18856 0 .997 .0043 AlT .19032 .18856 0 .003 .0043 B .10995 .21990 .4542 .0049 O1W 0 0 .7653 .607 .0060 F1W 0 0 .7653 .393 .0060 O2 .06030 .12060 .4882 .0064 O3V .2569 .12845 .5098 .0092 O4 .09258 .18516 .0717 .0092 O5 .1827 .09135 .0916 .0086 O6 .19182 .18237 .7796 .0068 O7 .28347 .28306 .0737 .0086 O8 .20776 .26828 .4383 .0098 H3V .248 .124 .382 .940 .07