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: MS8(2) Note: 1M polytype _database_code_amcsd 0004301 5.3213 9.2034 10.1048 90 99.954 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 .92 .029 .026 .027 .032 0 .006 0 NaA 0 .5 0 .07 .029 .026 .027 .032 0 .006 0 MgM1 0 0 .5 .37 .010 .008 .008 .015 0 .003 0 Fe3+M1 0 0 .5 .23 .010 .008 .008 .015 0 .003 0 Fe2+M1 0 0 .5 .22 .010 .008 .008 .015 0 .003 0 TiM1 0 0 .5 .06 .010 .008 .008 .015 0 .003 0 AlM1 0 0 .5 .02 .010 .008 .008 .015 0 .003 0 MgM2 0 .3447 .5 .37 .013 .008 .015 .017 0 .002 0 Fe3+M2 0 .3447 .5 .23 .013 .008 .015 .017 0 .002 0 Fe2+M2 0 .3447 .5 .22 .013 .008 .015 .017 0 .002 0 TiM2 0 .3447 .5 .06 .013 .008 .015 .017 0 .002 0 AlM2 0 .3447 .5 .02 .013 .008 .015 .017 0 .002 0 AlT .0723 .1674 .2219 .32 .011 .009 .010 .015 0 .002 0 SiT .0723 .1674 .2219 .68 .011 .009 .010 .015 0 .002 0 O1 .3228 .2309 .1643 .022 .020 .025 .022 -.006 .005 -.002 O2 .0153 0 .1673 .023 .027 .019 .022 0 .002 0 O3 .1293 .1702 .3910 .015 .013 .015 .018 0 .002 0 O4 .1381 .5 .4026 .016 .013 .017 .017 0 .003 0