Dravite Bloodaxe E S, Hughes J M, Dyar M D, Grew E S, Guidotti C V American Mineralogist 84 (1999) 922-928 Linking structure and chemistry in the schorl-dravite series Sample Ru-T18-92 _database_code_amcsd 0002245 15.945 15.945 7.169 90 90 120 R3m atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) CaX 0 0 .25 .061 .0019 .0019 .0077 .00095 0 0 NaX 0 0 .25 .626 .0019 .0019 .0077 .00095 0 0 KX 0 0 .25 .031 .0019 .0019 .0077 .00095 0 0 AlY .27103 .54206 .3151 .318 .00071 .00097 .0053 .000485 .00024 .00048 MgY .27103 .54206 .3151 .366 .00071 .00097 .0053 .000485 .00024 .00048 FeY .27103 .54206 .3151 .263 .00071 .00097 .0053 .000485 .00024 .00048 TiY .27103 .54206 .3151 .041 .00071 .00097 .0053 .000485 .00024 .00048 VY .27103 .54206 .3151 .003 .00071 .00097 .0053 .000485 .00024 .00048 LiY .27103 .54206 .3151 .002 .00071 .00097 .0053 .000485 .00024 .00048 CrY .27103 .54206 .3151 .002 .00071 .00097 .0053 .000485 .00024 .00048 MnY .27103 .54206 .3151 .002 .00071 .00097 .0053 .000485 .00024 .00048 AlZ .29813 .26163 .6300 .894 .00059 .00052 .00231 .00026 .00000 .000055 MgZ .29813 .26163 .6300 .106 .00059 .00052 .00231 .00026 .00000 .000055 SiT .19181 .18982 .0188 .00062 .00054 .00250 .000275 -.00001 -.000145 B .1102 .2204 .4733 .0009 .0008 .0027 .0004 -.00005 -.0001 O1 0 0 .7954 .669 .0018 .0018 .0050 .0009 0 0 F1 0 0 .7954 .331 .0018 .0018 .0050 .0009 0 0 O2 .06143 .12286 .5041 .00155 .0008 .0050 .0004 .0003 .0006 O3 .2660 .1330 .5283 .106 .0023 .00119 .0034 .00115 -.0002 -.0001 OH3 .2660 .1330 .5283 .894 .0023 .00119 .0034 .00115 -.0002 -.0001 O4 .0931 .1862 .0888 .00082 .0019 .0039 .00095 .0000 .0000 O5 .1859 .09295 .1106 .0016 .00065 .0045 .0008 .00015 .000075 O6 .1966 .1864 .7947 .00116 .00122 .0025 .00070 -.0003 -.00035 O7 .2851 .2854 .0979 .00085 .00069 .0036 .00024 -.0001 -.00025 O8 .2097 .2705 .4596 .00071 .00101 .0050 .00055 -.00015 .0003