Biotite Brigatti M F, Galli E, Poppi L American Mineralogist 76 (1991) 1174-1183 Effect of Ti substitution in biotite-M crystal chemistry Sample 17 from a quartz diorite, Capo Vaticano, Italy _database_code_amcsd 0001387 5.323 9.215 10.210 90 100.14 90 C2/m atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Si .0759 .1664 .2268 .691 .0056 .0033 .0035 -.0002 .0020 .0001 Al .0759 .1664 .2268 .309 .0056 .0033 .0035 -.0002 .0020 .0001 K 0 .5 0 .914 .0212 .0095 .0106 0 .0050 0 Ca 0 .5 0 .001 .0212 .0095 .0106 0 .0050 0 Na 0 .5 0 .022 .0212 .0095 .0106 0 .0050 0 Mg1 0 0 .5 .415 .0073 .0023 .0033 0 .0010 0 Al1 0 0 .5 .064 .0073 .0023 .0033 0 .0010 0 Cr1 0 0 .5 .002 .0073 .0023 .0033 0 .0010 0 Fe1 0 0 .5 .432 .0073 .0023 .0033 0 .0010 0 Mn1 0 0 .5 .003 .0073 .0023 .0033 0 .0010 0 Ti1 0 0 .5 .066 .0073 .0023 .0033 0 .0010 0 Mg2 0 .3327 .5 .415 .0075 .0022 .0031 0 .0020 0 Al2 0 .3327 .5 .064 .0075 .0022 .0031 0 .0020 0 Cr2 0 .3327 .5 .002 .0075 .0022 .0031 0 .0020 0 Fe2 0 .3327 .5 .432 .0075 .0022 .0031 0 .0020 0 Mn2 0 .3327 .5 .003 .0075 .0022 .0031 0 .0020 0 Ti2 0 .3327 .5 .066 .0075 .0022 .0031 0 .0020 0 O1 .0145 0 .1712 .0188 .0049 .0098 0 .0035 0 O2 .3249 .2298 .1697 .0132 .0064 .0093 -.0008 .0036 .0001 O3 .1302 .1671 .3904 .0066 .0033 .0023 -.0014 .0014 .0008 O4 .1293 .5 .3954 .0162 .0045 .0004 0 .0000 0