Biotite Brigatti M F, Davoli P American Mineralogist 75 (1990) 305-313 Crystal-structure refinement of 1M plutonic biotites sample M14 from a monzonite in the Valle del Cervo pluton _database_code_amcsd 0001294 5.343 9.258 10.227 90 100.26 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 0.0133 0.0029 0.0043 0 0.0031 0 Mg2 0 .3348 .5 0.0133 0.0040 0.0040 0 0.0023 0 K 0 .5 0 0.0306 0.0095 0.0089 0 0.0039 0 Al .0749 .1668 .2258 .25 0.0131 0.0031 0.0039 -.0001 0.0026 0 Si .0749 .1668 .2258 .75 0.0131 0.0031 0.0039 -.0001 0.0026 .0000 O1 .0268 0 .1690 0.0286 0.0041 0.0057 0 0.0021 .0000 O2 .3192 .2357 .1682 0.0198 0.0070 0.0045 -.0034 0.0026 -.0007 O3 .1312 .1678 .3912 0.0150 0.0046 0.0040 -.0004 0.0025 -.0002 O4 .1286 .5 .3957 0.0156 0.0040 0.0053 0 0.0029 0 H .09 .5 .315