Muscovite-2M1 Brigatti M F, Frigieri P, Poppi L American Mineralogist 83 (1998) 775-785 Crystal chemistry of Mg-, Fe-bearing muscovites-2M1 Sample GFS15Ab from peraluminous granites at Sardinia, Italy _database_code_amcsd 0002016 5.192 9.013 20.056 90 95.83 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 .0986 .25 .92 .0213 .0066 .00145 0 .00087 0 Na 0 .0986 .25 .08 .0213 .0066 .00145 0 .00087 0 Si1 .4517 .25880 .13549 .76 .0084 .00351 .00091 .00000 .00067 .00003 Al1 .4517 .25880 .13549 .24 .0084 .00351 .00091 .00000 .00067 .00003 Si2 .9648 .42995 .13538 .76 .0089 .0028 .00092 -.0003 .00082 .00003 Al2 .9648 .42995 .13538 .24 .0089 .0028 .00092 -.0003 .00082 .00003 Ti2 .2499 .08307 .00004 .01 .0102 .00375 .00093 -.0007 .00072 .00002 Fe2 .2499 .08307 .00004 .03 .0102 .00375 .00093 -.0007 .00072 .00002 Mg2 .2499 .08307 .00004 .04 .0102 .00375 .00093 -.0007 .00072 .00002 Al2 .2499 .08307 .00004 .92 .0102 .00375 .00093 -.0007 .00072 .00002 Al1 .75 .25 0 .03 H .872 .153 .055 .16 O11 .7499 .3109 .1574 .0126 .0066 .00120 -.0026 .0006 .00053 O21 .2485 .3701 .1686 .0171 .0054 .00102 .0013 .0005 -.00014 O22 .4171 .0935 .1681 .0183 .0045 .00108 .0000 .0010 .00005 O31 .3841 .2513 .05340 .0141 .0045 .0002 .0001 .0005 -.00002 O32 .9610 .4432 .05337 .0121 .0038 .00091 .0004 .0006 .00008 O4 .9557 .0620 .05007 .99 .0129 .0048 .00105 -.0010 .0010 -.00019 O4 .9557 .0620 .05007 .01 .0129 .0048 .00105 -.0010 .0010 -.00019