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 = 840 min _database_code_amcsd 0003983 9.7083 8.9419 5.2481 90 108.496 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 .255350 .016998 .227835 .1638 .010076 .011664 .006989 .000526 .000531 .001827 FeM2A .255350 .016998 .227835 .6168 .010076 .011664 .006989 .000526 .000531 .001827 CaM2A .255350 .016998 .227835 .0818 .010076 .011664 .006989 .000526 .000531 .001827 MnM2A .255350 .016998 .227835 .0256 .010076 .011664 .006989 .000526 .000531 .001827 NaM2A .255350 .016998 .227835 .0030 .010076 .011664 .006989 .000526 .000531 .001827 CaM2B .254006 .049964 .250523 .1090 .012862 MgM1 .250458 .654636 .231614 .7555 .008114 .007295 .007803 .000129 .002486 .000376 Fe2+M1 .250458 .654636 .231614 .2165 .008114 .007295 .007803 .000129 .002486 .000376 Fe3+M1 .250458 .654636 .231614 .0147 .008114 .007295 .007803 .000129 .002486 .000376 TiM1 .250458 .654636 .231614 .0101 .008114 .007295 .007803 .000129 .002486 .000376 MnM1 .250458 .654636 .231614 .0031 .008114 .007295 .007803 .000129 .002486 .000376 SiA .042773 .340485 .276644 .006343 .006583 .010066 -.000480 .003513 -.000497 SiB .549476 .837426 .238619 .9840 .006577 .006701 .007699 -.000973 .002872 -.000866 AlB .549476 .837426 .238619 .0160 .006577 .006701 .007699 -.000973 .002872 -.000866 O1A .867700 .338268 .168992 .007240 .009438 .009464 .000348 .002843 .000026 O2A .121729 .499420 .332068 .012667 .008788 .013187 -.003050 .005932 -.001450 O3A .104064 .261685 .577778 .008956 .022733 .020495 .000523 .004326 .013274 O1B .373752 .836774 .134780 .007120 .009922 .010009 .000104 .003076 .000034 O2B .629048 .987627 .372865 .014394 .012164 .020520 -.005910 .009837 -.007271 O3B .604800 .709020 .480661 .008604 .020696 .012748 .000691 .003710 .007679