Pigeonite Domeneghetti M C, Zema M, Tazzoli V American Mineralogist 90 (2005) 1816-1823 Kinetics of Fe2+-Mg order-disorder in P2_1/c pigeonite Locality: Parana, Brazil Sample: N.13, annealed at T = 650 C for t = 1680 min _database_code_amcsd 0003984 9.7050 8.9419 5.2454 90 108.485 90 P2_1/c atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) MgM2A .255294 .016983 .227843 .1633 .009888 .011808 .007204 .000392 .000669 .001650 FeM2A .255294 .016983 .227843 .6173 .009888 .011808 .007204 .000392 .000669 .001650 CaM2A .255294 .016983 .227843 .0798 .009888 .011808 .007204 .000392 .000669 .001650 MnM2A .255294 .016983 .227843 .0258 .009888 .011808 .007204 .000392 .000669 .001650 NaM2A .255294 .016983 .227843 .0029 .009888 .011808 .007204 .000392 .000669 .001650 CaM2B .254803 .049987 .251073 .1109 .012528 MgM1 .250486 .654615 .231632 .7537 .007833 .007442 .007987 .000070 .002677 .000376 Fe2+M1 .250486 .654615 .231632 .2182 .007833 .007442 .007987 .000070 .002677 .000376 Fe3+M1 .250486 .654615 .231632 .0149 .007833 .007442 .007987 .000070 .002677 .000376 TiM1 .250486 .654615 .231632 .0100 .007833 .007442 .007987 .000070 .002677 .000376 MnM1 .250486 .654615 .231632 .0031 .007833 .007442 .007987 .000070 .002677 .000376 SiA .042737 .340507 .276730 .006024 .006895 .010060 -.000566 .003481 -.000597 SiB .549473 .837436 .238531 .9840 .006275 .006962 .007882 -.001109 .002928 -.000931 AlB .549473 .837436 .238531 .0160 .006275 .006962 .007882 -.001109 .002928 -.000931 O1A .867461 .338201 .168841 .006385 .009842 .009864 .000404 .002548 -.000102 O2A .121810 .499265 .332051 .012511 .009078 .013444 -.003188 .006268 -.001488 O3A .104200 .261853 .578004 .008954 .023127 .020415 .000895 .004816 .013771 O1B .373691 .836795 .134666 .007003 .010440 .010018 .000527 .003254 -.000206 O2B .629186 .987420 .372973 .014439 .012151 .021478 -.006047 .010388 -.007216 O3B .604876 .709111 .480893 .008436 .020555 .013420 .000648 .003969 .007856