Biotite Brigatti M F, Galli E, Poppi L American Mineralogist 76 (1991) 1174-1183 Effect of Ti substitution in biotite-M crystal chemistry Sample 11 from a lamproite rock, Jummilla, Spain _database_code_amcsd 0001383 5.315 9.204 10.168 90 100.13 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 .0749 .1669 .2255 .717 .0062 .0022 .0026 .0000 .0009 .0000 Al .0749 .1669 .2255 .283 .0062 .0022 .0026 .0000 .0009 .0000 K 0 .5 0 .955 .0222 .0080 .0072 0 .0022 0 Ca 0 .5 0 .013 .0222 .0080 .0072 0 .0022 0 Na 0 .5 0 .030 .0222 .0080 .0072 0 .0022 0 Mg1 0 0 .5 .633 .0080 .0027 .0038 0 .0015 0 Al1 0 0 .5 .050 .0080 .0027 .0038 0 .0015 0 Cr1 0 0 .5 .024 .0080 .0027 .0038 0 .0015 0 Fe1 0 0 .5 .168 .0080 .0027 .0038 0 .0015 0 Mn1 0 0 .5 .009 .0080 .0027 .0038 0 .0015 0 Ti1 0 0 .5 .108 .0080 .0027 .0038 0 .0015 0 Mg2 0 .3364 .5 .633 .0070 .0042 .0034 0 .0010 0 Al2 0 .3364 .5 .050 .0070 .0042 .0034 0 .0010 0 Cr2 0 .3364 .5 .024 .0070 .0042 .0034 0 .0010 0 Fe2 0 .3364 .5 .168 .0070 .0042 .0034 0 .0010 0 Mn2 0 .3364 .5 .009 .0070 .0042 .0034 0 .0010 0 Ti2 0 .3364 .5 .108 .0070 .0042 .0034 0 .0010 0 O1 .0212 0 .1683 .0188 .0035 .0035 0 .0004 0 O2 .3230 .2327 .1674 .0126 .0062 .0033 -.0023 .0017 -.0006 O3 .1310 .1676 .3911 .0078 .0029 .0028 .0001 .0010 -.0001 O4 .1312 .5 .3998 .0075 .0028 .0031 0 .0013 0