Schorl Fortier S, Donnay G The Canadian Mineralogist 13 (1975) 173-177 Schorl refinement showing composition dependence of the tourmaline structure Locality: Andreasberg, Harz, Lower Saxony, Germany _database_code_amcsd 0005111 15.992 15.992 7.190 90 90 120 R3m atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) NaX 0 0 .22353 .88 .0226 .0226 .0275 .0113 0 0 CaX 0 0 .22353 .11 .0226 .0226 .0275 .0113 0 0 KX 0 0 .22353 .01 .0226 .0226 .0275 .0113 0 0 FeY .12566 .06283 .62792 .69 .0046 .0046 .0107 .0011 .0016 -.0016 AlY .12566 .06283 .62792 .15 .0046 .0046 .0107 .0011 .0016 -.0016 MgY .12566 .06283 .62792 .04 .0046 .0046 .0107 .0011 .0016 -.0016 CaY .12566 .06283 .62792 .02 .0046 .0046 .0107 .0011 .0016 -.0016 TiY .12566 .06283 .62792 .02 .0046 .0046 .0107 .0011 .0016 -.0016 LiY .12566 .06283 .62792 .02 .0046 .0046 .0107 .0011 .0016 -.0016 MnY .12566 .06283 .62792 .01 .0046 .0046 .0107 .0011 .0016 -.0016 AlZ .29883 .26171 .61158 .94 .0034 .0038 .0044 .0016 .0001 .0007 FeZ .29883 .26171 .61158 .06 .0034 .0038 .0044 .0016 .0001 .0007 SiT .19177 .18986 0 .0034 .0031 .0052 .0016 -.0002 -.0005 B .11029 .22058 .45461 .0043 .0043 .0081 .0021 .0007 .0007 OH1 0 0 .78366 .0514 .0514 .0087 .0257 0 0 O2 .06154 .12308 .48301 .0165 .0165 .0128 .0147 .0006 -.0006 OH3 .27060 .13530 .51146 .0104 .0104 .0067 .0019 -.0009 .0009 O4 .09278 .18556 .06907 .0054 .0054 .0086 -.0007 -.0006 .0006 O5 .18566 .09283 .09037 .0058 .0058 .0086 -.0002 -.0005 .0005 O6 .19772 .18787 .77785 .0080 .0083 .0049 .0041 .0002 -.0007 O7 .28462 .28518 .07966 .0054 .0045 .0077 .0010 -.0011 -.0011 O8 .20985 .27048 .44247 .0042 .0094 .0112 .0035 .0012 .0027