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.35, annealed at T = 700 C for t = 180 min _database_code_amcsd 0003968 9.7104 8.9417 5.2476 90 108.479 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 .255249 .016692 .227866 .1747 .009799 .011062 .006727 .000315 .000542 .001828 FeM2A .255249 .016692 .227866 .6061 .009799 .011062 .006727 .000315 .000542 .001828 CaM2A .255249 .016692 .227866 .0649 .009799 .011062 .006727 .000315 .000542 .001828 MnM2A .255249 .016692 .227866 .0255 .009799 .011062 .006727 .000315 .000542 .001828 NaM2A .255249 .016692 .227866 .0030 .009799 .011062 .006727 .000315 .000542 .001828 CaM2B .254329 .048960 .250055 .1258 .011687 MgM1 .250422 .654596 .231771 .7422 .007884 .007029 .007589 .000109 .002520 .000387 Fe2+M1 .250422 .654596 .231771 .2294 .007884 .007029 .007589 .000109 .002520 .000387 Fe3+M1 .250422 .654596 .231771 .0151 .007884 .007029 .007589 .000109 .002520 .000387 TiM1 .250422 .654596 .231771 .0100 .007884 .007029 .007589 .000109 .002520 .000387 MnM1 .250422 .654596 .231771 .0033 .007884 .007029 .007589 .000109 .002520 .000387 SiA .042746 .340562 .276437 .005960 .006456 .009956 -.000531 .003367 -.000616 SiB .549357 .837462 .238645 .9840 .006297 .006404 .007609 -.001043 .002785 -.000919 AlB .549357 .837462 .238645 .0160 .006297 .006404 .007609 -.001043 .002785 -.000919 O1A .867667 .338266 .168693 .006293 .009690 .009530 .000169 .002598 -.000121 O2A .121643 .499462 .332212 .012349 .008383 .013377 -.003436 .005939 -.001524 O3A .104209 .261339 .576959 .008991 .022984 .020842 .000175 .004324 .014267 O1B .373565 .836737 .134946 .006686 .010016 .009752 .000308 .002934 -.000155 O2B .628868 .987549 .372735 .014488 .012129 .020540 -.006129 .009888 -.007374 O3B .604797 .709114 .480957 .007608 .020099 .013260 .000545 .003315 .007769