Biotite Brigatti M F, Galli E, Poppi L American Mineralogist 76 (1991) 1174-1183 Effect of Ti substitution in biotite-M crystal chemistry Sample 16 from a monzonite-alkali syenite, Sande caldron, Norway _database_code_amcsd 0001386 5.333 9.256 10.186 90 100.17 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 .0747 .1669 .2254 .708 .0078 .0026 .0053 .0003 .0010 .0000 Al .0747 .1669 .2254 .292 .0078 .0026 .0053 .0003 .0010 .0000 K 0 .5 0 .968 .0267 .0092 .0124 0 .0025 0 Ca 0 .5 0 .009 .0267 .0092 .0124 0 .0025 0 Na 0 .5 0 .020 .0267 .0092 .0124 0 .0025 0 Mg1 0 0 .5 .467 .0112 .0030 .0049 0 .0010 0 Al1 0 0 .5 .027 .0112 .0030 .0049 0 .0010 0 Cr1 0 0 .5 .002 .0112 .0030 .0049 0 .0010 0 Fe1 0 0 .5 .413 .0112 .0030 .0049 0 .0010 0 Mn1 0 0 .5 .008 .0112 .0030 .0049 0 .0010 0 Ti1 0 0 .5 .077 .0112 .0030 .0049 0 .0010 0 Mg2 0 .3353 .5 .467 .0097 .0046 .0050 0 .0008 0 Al2 0 .3353 .5 .027 .0097 .0046 .0050 0 .0008 0 Cr2 0 .3353 .5 .002 .0097 .0046 .0050 0 .0008 0 Fe2 0 .3353 .5 .413 .0097 .0046 .0050 0 .0008 0 Mn2 0 .3353 .5 .008 .0097 .0046 .0050 0 .0008 0 Ti2 0 .3353 .5 .077 .0097 .0046 .0050 0 .0008 0 O1 .0297 0 .1678 .0283 .0036 .0074 0 .0010 0 O2 .3201 .2368 .1678 .0202 .0066 .0065 -.0027 .0008 -.0002 O3 .1310 .1679 .3905 .0112 .0032 .0050 .0000 .0013 -.0001 O4 .1291 .5 .3952 .0155 .0043 .0048 0 -.0002 0