Biotite
Brigatti M F, Davoli P
American Mineralogist 75 (1990) 305-313
Crystal-structure refinement of 1M plutonic biotites
sample M62 from a rock transitional between granitic and monzonitic in
the Valle del Cervo pluton
_database_code_amcsd 0001298
5.337 9.242 10.211 90 100.15 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)
Fe1      0     0    .5     0.0075 0.0036 0.0040      0 0.0020      0
Mg2      0 .3350    .5     0.0080 0.0040 0.0041      0 0.0017      0
K        0    .5     0     0.0245 0.0082 0.0089      0 0.0026      0
Al   .0746 .1666 .2255 .25 0.0043 0.0020 0.0040  .0001 0.0015  .0003
Si   .0746 .1666 .2255 .75 0.0043 0.0020 0.0040  .0001 0.0015  .0003
O1   .0239     0 .1698     0.0220 0.0032 0.0057      0 0.0016      0
O2   .3207 .2340 .1681     0.0115 0.0072 0.0061 -.0026 0.0031 -.0005
O3   .1303 .1676 .3909     0.0064 0.0020 0.0062  .0001 0.0024  .0001
O4   .1305    .5 .3952     0.0096 0.0038 0.0016      0 0.0001      0
H      .09    .5  .315