Chromo-alumino-povondraite Reznitskii L, Clark C M, Hawthorne F C, Grice J D, Skogby H, Halenius U, Bosi F American Mineralogist 99 (2014) 1767-1773 Chromo-alumino-povondraite, NaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup Locality: Sludyanka, Lake Baikal, Russia _database_code_amcsd 0020335 16.0277 16.0277 7.30850 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 .22801 .87 .0203 .0212 .0212 .0186 .0106 0 0 CaX 0 0 .22801 .07 .0203 .0212 .0212 .0186 .0106 0 0 KX 0 0 .22801 .02 .0203 .0212 .0212 .0186 .0106 0 0 CrY .12380 .061898 .63723 .76333 .00552 .00518 .00495 .00650 .00259 -.00074 -.00037 MgY .12380 .061898 .63723 .23667 .00552 .00518 .00495 .00650 .00259 -.00074 -.00037 AlZ .297903 .261913 .60938 .50667 .00450 .00424 .00464 .00442 .00207 .00002 .00026 MgZ .297903 .261913 .60938 .25667 .00450 .00424 .00464 .00442 .00207 .00002 .00026 CrZ .297903 .261913 .60938 .19667 .00450 .00424 .00464 .00442 .00207 .00002 .00026 VZ .297903 .261913 .60938 .03667 .00450 .00424 .00464 .00442 .00207 .00002 .00026 FeZ .297903 .261913 .60938 .00167 .00450 .00424 .00464 .00442 .00207 .00002 .00026 B .10993 .21986 .4549 .0072 .0065 .0073 .0083 .0036 .0003 .0005 Si .190426 .18870 0 .99333 .00570 .00567 .00524 .00609 .00266 -.00042 -.00050 Al .190426 .18870 0 .00667 .00570 .00567 .00524 .00609 .00266 -.00042 -.00050 O1 0 0 .7661 .73 .0072 .0071 .0071 .0073 .0035 0 0 F1 0 0 .7661 .25 .0072 .0071 .0071 .0073 .0035 0 0 OH1 0 0 .7661 .02 .0072 .0071 .0071 .0073 .0035 0 0 O2 .06037 .12074 .48900 .0068 .0066 .0048 .0083 .0024 .00029 .0006 O3 .25735 .12868 .51027 .0105 .0138 .0128 .0054 .0069 .0007 .00036 H3 .2575 .1287 .395 .016 O4 .09256 .18511 .07144 .0106 .0085 .0174 .0087 .0087 -.0002 -.0004 O5 .18285 .09142 .09074 .0100 .0161 .0079 .0087 .0081 .0011 .0005 O6 .19226 .18294 .78002 .00773 .0104 .0080 .0055 .0052 -.0004 -.0009 O7 .28334 .28296 .07444 .00938 .0084 .0072 .0092 .0015 -.0024 -.0005 O8 .20763 .26830 .43859 .01093 .0055 .0094 .0173 .0033 .0010 .0031