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 = 800 C for t = 3.5 min _database_code_amcsd 0003973 9.7088 8.9429 5.2473 90 108.471 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 .255280 .017044 .227912 .1833 .009987 .011863 .006816 .000528 .000698 .001816 FeM2A .255280 .017044 .227912 .5972 .009987 .011863 .006816 .000528 .000698 .001816 CaM2A .255280 .017044 .227912 .0863 .009987 .011863 .006816 .000528 .000698 .001816 MnM2A .255280 .017044 .227912 .0255 .009987 .011863 .006816 .000528 .000698 .001816 NaM2A .255280 .017044 .227912 .0029 .009987 .011863 .006816 .000528 .000698 .001816 CaM2B .254272 .050619 .252196 .1047 .011567 MgM1 .250410 .654589 .231630 .7330 .007829 .007050 .007552 .000137 .002525 .000420 Fe2+M1 .250410 .654589 .231630 .2385 .007829 .007050 .007552 .000137 .002525 .000420 Fe3+M1 .250410 .654589 .231630 .0150 .007829 .007050 .007552 .000137 .002525 .000420 TiM1 .250410 .654589 .231630 .0100 .007829 .007050 .007552 .000137 .002525 .000420 MnM1 .250410 .654589 .231630 .0035 .007829 .007050 .007552 .000137 .002525 .000420 SiA .042771 .340530 .276582 .005983 .006446 .009869 -.000556 .003440 -.000599 SiB .549408 .837444 .238616 .9840 .006267 .006385 .007583 -.001024 .002807 -.000935 AlB .549408 .837444 .238616 .0160 .006267 .006385 .007583 -.001024 .002807 -.000935 O1A .867629 .338328 .169180 .006583 .009559 .009629 .000355 .002822 -.000282 O2A .121642 .499443 .331902 .012494 .008765 .013243 -.003542 .006115 -.001064 O3A .104192 .261785 .577541 .008298 .022988 .021030 .000732 .004276 .014241 O1B .373700 .836787 .135255 .006841 .009781 .010019 .000436 .003251 -.000149 O2B .628891 .987560 .372624 .014588 .012100 .020939 -.006153 .010110 -.007526 O3B .604855 .709016 .480985 .007579 .020621 .012796 .000658 .003367 .008005