Annite Laurora A, Brigatti M F, Mottana A, Malferrari D, Caprilli E American Mineralogist 92 (2007) 468-480 Crystal chemistry of trioctahedral micas in alkaline and subalkaline volcanic rocks: A case study from Mt. Sassetto (Tolfa district, Latium, central Italy) Locality: Mt. Sassetto, Tolfa district, Latium, Italy Sample: MS7 Note: 1M polytype _database_code_amcsd 0004299 5.3207 9.2099 10.1034 90 99.959 90 C2/m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) KA 0 .5 0 .93 .026 .024 .024 .029 0 .005 0 NaA 0 .5 0 .07 .026 .024 .024 .029 0 .005 0 MgM1 0 0 .5 .34 .014 .011 .011 .019 0 .004 0 Fe3+M1 0 0 .5 .25 .014 .011 .011 .019 0 .004 0 Fe2+M1 0 0 .5 .22 .014 .011 .011 .019 0 .004 0 TiM1 0 0 .5 .08 .014 .011 .011 .019 0 .004 0 MgM2 0 .3451 .5 .34 .011 .007 .011 .014 0 .001 0 Fe3+M2 0 .3451 .5 .25 .011 .007 .011 .014 0 .001 0 Fe2+M2 0 .3451 .5 .22 .011 .007 .011 .014 0 .001 0 TiM2 0 .3451 .5 .19 .011 .007 .011 .014 0 .001 0 AlT .0723 .1675 .2218 .32 .010 .008 .008 .013 0 .002 0 SiT .0723 .1675 .2218 .68 .010 .008 .008 .013 0 .002 0 O1 .3226 .2310 .1645 .020 .017 .024 .017 -.005 .004 -.002 O2 .0161 0 .1670 .020 .027 .013 .019 0 .002 0 O3 .1293 .1704 .3912 .013 .011 .013 .016 .001 .002 0 O4 .1385 .5 .4032 .014 .013 .015 .016 0 .003 0