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 = 750 C for t = 15 min _database_code_amcsd 0003988 9.7100 8.9425 5.2470 90 108.495 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 .255352 .016884 .227763 .1766 .010160 .011325 .007292 .000549 .000861 .001776 FeM2A .255352 .016884 .227763 .6035 .010160 .011325 .007292 .000549 .000861 .001776 CaM2A .255352 .016884 .227763 .0854 .010160 .011325 .007292 .000549 .000861 .001776 MnM2A .255352 .016884 .227763 .0254 .010160 .011325 .007292 .000549 .000861 .001776 NaM2A .255352 .016884 .227763 .0030 .010160 .011325 .007292 .000549 .000861 .001776 CaM2B .254228 .050635 .249672 .1060 .010891 MgM1 .250485 .654544 .231401 .7427 .008019 .006922 .007716 .000121 .002658 .000391 Fe2+M1 .250485 .654544 .231401 .2291 .008019 .006922 .007716 .000121 .002658 .000391 Fe3+M1 .250485 .654544 .231401 .0148 .008019 .006922 .007716 .000121 .002658 .000391 TiM1 .250485 .654544 .231401 .0101 .008019 .006922 .007716 .000121 .002658 .000391 MnM1 .250485 .654544 .231401 .0033 .008019 .006922 .007716 .000121 .002658 .000391 SiA .042730 .340529 .276987 .006270 .006402 .010099 -.000466 .003713 -.000652 SiB .549506 .837414 .238500 .9840 .006515 .006273 .008035 -.000936 .002964 -.000871 AlB .549506 .837414 .238500 .0160 .006515 .006273 .008035 -.000936 .002964 -.000871 O1A .867569 .338344 .169231 .006948 .009497 .009704 .000215 .002950 -.000118 O2A .121805 .499435 .331915 .013088 .008483 .013538 -.003161 .006236 -.001465 O3A .104015 .261724 .577531 .008534 .021421 .021151 .000509 .004146 .013361 O1B .373623 .836731 .134554 .007438 .009877 .010243 .000308 .003324 -.000143 O2B .629058 .987268 .373140 .014229 .012135 .020847 -.005885 .009569 -.007278 O3B .604826 .709132 .480646 .007849 .019519 .013338 .000240 .003296 .007327