Oxy-chromium-dravite Bosi F, Reznitskii L, Skogby H American Mineralogist 97 (2012) 2024-2030 Oxy-chromium-dravite, NaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup Locality: Pereval marble quarry, Sludyanka, Lake Baikal, Russia _database_code_amcsd 0019734 16.1121 16.1121 7.3701 90 90 120 R3m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) NaX 0 0 .2270 .0240 .0255 .0255 .0212 .0127 0 0 CrY .123083 .061541 .63874 .650 .00487 .00427 .00430 .00604 .00213 -.00037 -.00019 VY .123083 .061541 .63874 .290 .00487 .00427 .00430 .00604 .00213 -.00037 -.00019 MgY .123083 .061541 .63874 .047 .00487 .00427 .00430 .00604 .00213 -.00037 -.00019 TiY .123083 .061541 .63874 .013 .00487 .00427 .00430 .00604 .00213 -.00037 -.00019 CrZ .297600 .261475 .60855 .562 .00455 .00414 .00464 .00480 .00215 -.00014 .00033 MgZ .297600 .261475 .60855 .322 .00455 .00414 .00464 .00480 .00215 -.00014 .00033 AlZ .297600 .261475 .60855 .116 .00455 .00414 .00464 .00480 .00215 -.00014 .00033 B .10930 .21861 .4548 .0063 .0054 .0056 .0080 .0028 .0004 .0008 Si .189436 .187762 0 .983 .00489 .00451 .00431 .00567 .00208 -.00024 -.00035 Al .189436 .187762 0 .017 .00489 .00451 .00431 .00567 .00208 -.00024 -.00035 O1 0 0 .7649 .54 .0059 .0048 .0048 .0080 .0024 0 0 F1 0 0 .7649 .46 .0059 .0048 .0048 .0080 .0024 0 0 O2 .06015 .12030 .49116 .00532 .0044 .0041 .0074 .0021 .00066 .0013 O3 .25501 .12751 .50900 .00814 .0096 .0089 .0062 .0048 .0013 .00064 H3 .2507 .1253 .376 .89 .012 O4 .09250 .18500 .07148 .0091 .0068 .0150 .0083 .0075 -.0002 -.0004 O5 .18209 .09105 .09007 .00848 .0138 .0060 .0081 .0069 .0007 .00035 O6 .19072 .18146 .78133 .00620 .0075 .0060 .0046 .0030 -.0001 -.0005 O7 .28246 .28199 .07220 .00794 .0067 .0059 .0084 .0011 -.0016 -.0015 O8 .20649 .26678 .43700 .00893 .0051 .0085 .0132 .0034 .0007 .0035