Dravite Bosi F American Mineralogist 93 (2008) 1647-1653 Disordering of Fe2+ over octahedrally coordinated sites of tourmaline Locality: Uto Island, south of Stockholm, Sweden _database_code_amcsd 0004680 15.9875 15.9875 7.2372 90 90 120 R3m atom x y z occ Uiso NaX 0 0 .22803 .64 .0121 CaX 0 0 .22803 .29 .0121 KX 0 0 .22803 .01 .0121 MgY .12314 .06157 .63654 .427 .0072 FeY .12314 .06157 .63654 .383 .0072 AlY .12314 .06157 .63654 .18 .0072 MnY .12314 .06157 .63654 .007 .0072 TiY .12314 .06157 .63654 .003 .0072 AlZ .29818 .26182 .61179 .79 .0054 MgZ .29818 .26182 .61179 .16 .0054 FeZ .29818 .26182 .61179 .05 .0054 B .11004 .22008 .45391 .0067 SiT .19155 .18979 0 .0050 O1W 0 0 .77405 .38 .0118 OH1W 0 0 .77405 .54 .0118 FO1W 0 0 .77405 .08 .0118 O2 .06076 .12152 .48109 .0099 O3V .26447 .132235 .51197 .0115 O4 .09254 .18508 .07090 .0098 O5 .18277 .091385 .09062 .0099 O6 .19543 .18604 .77857 .0084 O7 .28443 .28420 .07916 .0087 O8 .20917 .26991 .44095 .0102 H .2510 .1255 .3888 .04