Muscovite-2M1 Brigatti M F, Frigieri P, Poppi L American Mineralogist 83 (1998) 775-785 Crystal chemistry of Mg-, Fe-bearing muscovites-2M1 Sample H87b from peraluminous granites at Sardinia, Italy _database_code_amcsd 0002017 5.209 9.035 20.066 90 95.68 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 .0979 .25 .96 .0249 .0093 .00206 0 .0012 0 Na 0 .0979 .25 .04 .0249 .0093 .00206 0 .0012 0 Si1 .4520 .2578 .13565 .77 .0114 .0056 .00125 .0001 .00072 .0000 Al1 .4520 .2578 .13565 .23 .0114 .0056 .00125 .0001 .00072 .0000 Si2 .9647 .4289 .13567 .77 .0146 .0051 .00122 -.0001 .0008 .0001 Al2 .9647 .4289 .13567 .23 .0146 .0051 .00122 -.0001 .0008 .0001 Fe2 .2507 .0835 .00009 .15 .0136 .0061 .00135 .0002 .00081 .00009 Al2 .2507 .0835 .00009 .85 .0136 .0061 .00135 .0002 .00081 .00009 Al1 .75 .25 0 .06 O11 .7472 .3137 .1584 .0202 .0078 .00171 -.0012 .0006 .0006 O21 .2437 .3674 .1692 .0247 .0084 .00144 .0007 .0004 -.0003 O22 .4230 .0929 .1684 .0196 .0064 .00153 .0000 .0008 -.0001 O31 .3903 .2516 .0537 .0185 .0069 .00129 .0013 .0010 .0003 O32 .9620 .4421 .0536 .0185 .0071 .00123 -.0004 .0008 .0002 O4 .9555 .0636 .0504 .98 .0180 .0067 .00138 -.0005 .0012 -.0003 F4 .9555 .0636 .0504 .02 .0180 .0067 .00138 -.0005 .0012 -.0003