Annite Brigatti M F, Frigieri P, Ghezzo c, Poppi L American Mineralogist 85 (2000) 436-448 Crystal chemistry of Al-rich biotites coexisting with muscovites in peraluminous granites Sample: H87 Locality: Riu Morunzu, Sardinia Island, Italy _database_code_amcsd 0002387 5.344 9.256 10.237 90 100.27 90 C2/m atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) KA 0 .5 0 .98 .0230 .0069 .0081 0 .0023 0 NaA 0 .5 0 .02 .0230 .0069 .0081 0 .0023 0 Fe2+1 0 0 .5 .68 .0067 .00123 .00431 0 .0020 0 Mg1 0 0 .5 .16 .0067 .00123 .00431 0 .0020 0 Fe2+2 0 .33309 .5 .40 .0063 .00158 .00405 0 .00124 0 Mg2 0 .33309 .5 .27 .0063 .00158 .00405 0 .00124 0 Ti2 0 .33309 .5 .08 .0063 .00158 .00405 0 .00124 0 Al2 0 .33309 .5 .25 .0063 .00158 .00405 0 .00124 0 SiT .0755 .16709 .22608 .68 .0066 .00124 .00378 .00000 .00152 -.00001 AlT .0755 .16709 .22608 .32 .0066 .00124 .00378 .00000 .00152 -.00001 O1 .0160 0 .1705 .0199 .0033 .0049 0 -.0000 0 O2 .3270 .2296 .1690 .0157 .0053 .0052 -.0030 .0029 -.0007 O3 .1330 .1690 .3923 .0141 .0030 .0039 -.0002 .0012 .0000 OH4 .1263 .5 .3970 .78 .0126 .0048 .0037 0 .0010 0 O4 .1263 .5 .3970 .12 .0126 .0048 .0037 0 .0010 0 F4 .1263 .5 .3970 .08 .0126 .0048 .0037 0 .0010 0 Cl4 .1263 .5 .3970 .02 .0126 .0048 .0037 0 .0010 0