Fluor-buergerite Tippe A, Hamilton W C American Mineralogist 56 (1971) 101-113 A neutron-diffraction study of the ferric tourmaline, buergerite Locality: Mexquitic, San Luis Potosi, Mexico _database_code_amcsd 0000221 15.869 15.869 7.188 90 90 120 R3m atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) NaX 0 0 .21186 .00325 .00325 .00720 .001625 0 0 FeY -.06614 .06614 .62217 .00103 .00103 .00585 .00015 .00087 -.00087 AlZ .29925 .25919 .60450 .00063 .00058 .00233 .00014 -.00007 .00041 SiT .19171 .19087 0 .00063 .00062 .00294 .00029 -.00005 -.00034 B .11001 -.11001 .45172 .00059 .00059 .00340 .00030 .00018 -.00018 F1 0 0 .76850 .00192 .00192 .00359 .00096 0 0 O2 .06042 -.06042 .48532 .00099 .00099 .00415 .00077 .00009 -.00009 O3 -.13205 .13205 .52026 .00067 .00067 .00381 -.00004 -.00011 .00011 O4 .09463 -.09463 .07612 .00086 .00086 .00356 .00033 -.00020 .00020 O5 -.09117 .09117 .08362 .00095 .00095 .00298 .00015 -.00003 .00003 O6 .19320 .18712 .77538 .00071 .00079 .00202 .00022 .00001 -.00006 O7 .28708 .28592 .07513 .00061 .00047 .00315 .00012 .00001 -.00021 O8 .20925 .26971 .43868 .00039 .00096 .00411 .00026 .00032 .00052 H -.1313 .1313 .3889 2.4