Biotite Bohlen S R, Peacor D R, Essene E J American Mineralogist 65 (1980) 55-62 Crystal chemistry of a metamorphic biotite and its significance in water barometry Locality: Au Sable Forks, New York _database_code_amcsd 0000756 5.357 9.245 20.234 90 94.978 90 C2/c atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) K 0 .0844 .25 0.0232 0.0071 0.0016 0 0.0007 0 Fe1 .75 .25 0 .464 0.0072 0.0019 0.0006 -.0007 0.0006 -.0001 Mg1 .75 .25 0 .387 0.0072 0.0019 0.0006 -.0007 0.0006 -.0001 Ti1 .75 .25 0 .092 0.0072 0.0019 0.0006 -.0007 0.0006 -.0001 Fe2 .2480 .0826 0 .464 0.0092 0.0022 0.0006 -.0004 0.0005 0 Mg2 .2480 .0826 0 .387 0.0092 0.0022 0.0006 -.0004 0.0005 0 Ti2 .2480 .0862 0 .092 0.0092 0.0022 0.0006 -.0004 0.0005 0 Si1 .4625 .2508 .1373 .698 0.0066 0.0019 0.0003 -.0002 0.0005 0.0001 Al1 .4625 .2508 .1373 .302 0.0066 0.0019 0.0003 -.0002 0.0005 0.0001 Si2 .9630 .4175 .1375 .698 0.0071 0.0020 0.0005 -.0001 0.0005 0.0000 Al2 .9630 .4175 .1375 .302 0.0071 0.0020 0.0005 -.0001 0.0005 0.0000 O1 .7341 .3201 .1656 0.0133 0.0075 0.0006 -.0041 0.0005 0.0003 O2 .2368 .3476 .1659 0.0147 0.0064 0.0007 0.0030 0.0000 -.0002 O3 .4459 .0836 .1660 0.0237 0.0030 0.0007 0.0012 0.0014 0.0001 O4 .4323 .2395 .0544 0.0080 0.0011 0.0008 -.0020 0.0004 0.0002 O5 .9361 .4073 .0545 0.0113 0.0016 0.0004 -.0006 0.0005 0.0003 O6 .9367 .0709 .0537 0.0136 0.0002 0.0019 0.0002 0.0012 0.0004