Biotite Brigatti M F, Davoli P American Mineralogist 75 (1990) 305-313 Crystal-structure refinement of 1M plutonic biotites sample M13 from a granite in the Valle del Cervo pluton _database_code_amcsd 0001296 5.355 9.251 10.246 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 0.0136 0.0043 0.0045 0 0.0030 0 Mg2 0 .3342 .5 0.0115 0.0054 0.0044 0 0.0023 0 K 0 .5 0 0.0306 0.0106 0.0100 0 0.0054 0 Al .0752 .1666 .2256 .25 0.0095 0.0035 0.0041 -.0007 0.0024 -.0003 Si .0752 .1666 .2256 .75 0.0095 0.0035 0.0041 -.0007 0.0024 -.0003 O1 .0241 0 .1694 0.0242 0.0071 0.0065 0 0.0035 0 O2 .3203 .2355 .1668 0.0213 0.0081 0.0064 -.0020 0.0045 -.0004 O3 .1330 .1676 .3916 0.0105 0.0031 0.0050 -.0005 0.0017 .0001 O4 .1304 .5 .3949 0.0131 0.0048 0.0028 0 0.0018 0