Dravite Vereshchagin O S, Rozhdestvenskaya I V, Frank-Kamenetskaya O V, Zolotarev A A European Journal of Mineralogy 26 (2014) 309-321 Ion substitutions and structural adjustment in Cr-bearing tourmalines Note: Sample 3 Locality: Shabrovskoe ore district, Middle Urals, Russia _database_code_amcsd 0020156 15.933 15.933 7.213 90 90 120 R3m atom x y z occ Uiso CaX 0 0 .2274 .13 .0129 NaX 0 0 .2274 .63 .0129 AlY .12349 .06175 .63613 .65 .00364 CrY .12349 .06175 .63613 .09 .00364 FeY .12349 .06175 .63613 .01 .00364 MgY .12349 .06175 .63613 .25 .00364 AlZ .29778 .26162 .61020 .65 .00298 CrZ .29778 .26162 .61020 .09 .00298 FeZ .29778 .26162 .61020 .01 .00298 MgZ .29778 .26162 .61020 .25 .00298 SiT .19152 .18957 0 .00338 B .11006 .22012 .4534 .0044 OHw 0 0 .7698 .85 .0074 O1w 0 0 .7698 .15 .0074 O2 .06060 .12120 .4876 .0083 OHv .26056 .13028 .5097 .85 .0079 O3v .26056 .13028 .5097 .15 .0079 O4 .09329 .18658 .0721 .0066 O5 .18393 .09197 .0929 .0060 O6 .19398 .18408 .7775 .0059 O7 .28505 .28483 .0768 .0062 O8 .20889 .26976 .4391 .0072