Annite Brigatti M F, Frigieri P, Ghezzo c, Poppi L American Mineralogist 85 (2000) 436-448 Crystal chemistry of Al-rich biotites coexisting with muscovites in peraluminous granites Sample: C3-31 Locality: Tinker Glacier, Northern Victoria Land, Antarctica _database_code_amcsd 0002389 5.347 9.257 10.211 90 100.27 90 C2/m atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) KA 0 .5 0 .96 .0233 .0073 .0078 0 .0026 0 NaA 0 .5 0 .03 .0233 .0073 .0078 0 .0026 0 CaA 0 .5 0 .02 .0233 .0073 .0078 0 .0026 0 BaA 0 .5 0 .02 .0233 .0073 .0078 0 .0026 0 Fe2+1 0 0 .5 .64 .0064 .0013 .0030 0 .0014 0 Mg1 0 0 .5 .26 .0064 .0013 .0030 0 .0014 0 Fe2+2 0 .33325 .5 .45 .0063 .00218 .00297 0 .0006 0 Mg2 0 .33325 .5 .22 .0063 .00218 .00297 0 .0006 0 Ti2 0 .33325 .5 .10 .0063 .00218 .00297 0 .0006 0 Al2 0 .33325 .5 .24 .0063 .00218 .00297 0 .0006 0 SiT .0756 .16706 .22573 .66 .0070 .00148 .00233 .0001 .00077 .00001 AlT .0756 .16706 .22573 .34 .0070 .00148 .00233 .0001 .00077 .00001 O1 .0181 0 .1700 .0170 .0026 .0047 0 .0009 0 O2 .3252 .2307 .1681 .0148 .0049 .0037 -.0032 .0022 -.0007 O3 .1322 .1686 .3915 .0138 .0028 .0026 -.0004 .0008 -.0001 OH4 .1280 .5 .3975 .80 .0110 .0044 .0030 0 .0009 0 O4 .1280 .5 .3975 .20 .0110 .0044 .0030 0 .0009 0