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 2 Locality: Shabrovskoe ore district, Middle Urals, Russia _database_code_amcsd 0020155 15.933 15.933 7.213 90 90 120 R3m atom x y z occ Uiso CaX 0 0 .2297 .02 .0181 NaX 0 0 .2297 .76 .0181 KX 0 0 .2297 .01 .0181 AlY .12367 .06184 .6364 .65 .0052 CrY .12367 .06184 .6364 .08 .0052 FeY .12367 .06184 .6364 .01 .0052 MgY .12367 .06184 .6364 .26 .0052 AlZ .29776 .26152 .61006 .65 .0044 CrZ .29776 .26152 .61006 .08 .0044 FeZ .29776 .26152 .61006 .01 .0044 MgZ .29776 .26152 .61006 .26 .0044 SiT .19153 .18969 0 .99 .0045 AlT .19153 .18969 0 .01 .0045 B .10991 .21982 .4537 .0060 OHw 0 0 .7693 .92 .0100 O1w 0 0 .7693 .08 .0100 O2 .06062 .12124 .4872 .0110 OHv .26074 .13037 .5098 .92 .0102 O3v .26074 .13037 .5098 .08 .0102 O4 .09316 .18632 .0709 .0088 O5 .18442 .09221 .0922 .0079 O6 .19430 .18417 .7769 .0076 O7 .28483 .28468 .0773 .0079 O8 .20900 .26970 .4388 .0093