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(1) Note: 1M polytype _database_code_amcsd 0004300 5.3216 9.2114 10.1060 90 99.949 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 .028 .027 .031 0 .006 0 NaA 0 .5 0 .07 .029 .028 .027 .031 0 .006 0 MgM1 0 0 .5 .37 .011 .010 .010 .015 0 .004 0 Fe3+M1 0 0 .5 .23 .011 .010 .010 .015 0 .004 0 Fe2+M1 0 0 .5 .22 .011 .010 .010 .015 0 .004 0 TiM1 0 0 .5 .06 .011 .010 .010 .015 0 .004 0 AlM1 0 0 .5 .02 .011 .010 .010 .015 0 .004 0 MgM2 0 .3454 .5 .37 .012 .009 .013 .014 0 .002 0 Fe3+M2 0 .3454 .5 .23 .012 .009 .013 .014 0 .002 0 Fe2+M2 0 .3454 .5 .22 .012 .009 .013 .014 0 .002 0 TiM2 0 .3454 .5 .06 .012 .009 .013 .014 0 .002 0 AlM2 0 .3454 .5 .02 .012 .009 .013 .014 0 .002 0 AlT .0722 .1674 .2221 .32 .010 .010 .009 .012 0 .003 0 SiT .0722 .1674 .2221 .68 .010 .010 .009 .012 0 .003 0 O1 .3228 .2308 .1646 .022 .022 .024 .021 -.005 .005 -.001 O2 .0150 0 .1675 .022 .030 .016 .021 0 .003 0 O3 .1289 .1699 .3913 .014 .013 .014 .014 0 .002 0 O4 .1389 .5 .4029 .014 .014 .014 .015 0 .004 0