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 = 50 min _database_code_amcsd 0003990 9.7100 8.9462 5.2480 90 108.494 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 .255397 .017006 .227798 .1853 .010350 .011857 .007178 .000642 .000714 .001838 FeM2A .255397 .017006 .227798 .5953 .010350 .011857 .007178 .000642 .000714 .001838 CaM2A .255397 .017006 .227798 .0905 .010350 .011857 .007178 .000642 .000714 .001838 MnM2A .255397 .017006 .227798 .0254 .010350 .011857 .007178 .000642 .000714 .001838 NaM2A .255397 .017006 .227798 .0030 .010350 .011857 .007178 .000642 .000714 .001838 CaM2B .254139 .050652 .250382 .1005 .011767 MgM1 .250475 .654558 .231353 .7323 .008199 .007122 .007921 .000138 .002570 .000401 Fe2+M1 .250475 .654558 .231353 .2393 .008199 .007122 .007921 .000138 .002570 .000401 Fe3+M1 .250475 .654558 .231353 .0149 .008199 .007122 .007921 .000138 .002570 .000401 TiM1 .250475 .654558 .231353 .0101 .008199 .007122 .007921 .000138 .002570 .000401 MnM1 .250475 .654558 .231353 .0035 .008199 .007122 .007921 .000138 .002570 .000401 SiA .042771 .340522 .277198 .006160 .006592 .009959 -.000488 .003532 -.000605 SiB .549509 .837405 .238559 .9840 .006617 .006437 .007905 -.001008 .002763 -.000890 AlB .549509 .837405 .238559 .0160 .006617 .006437 .007905 -.001008 .002763 -.000890 O1A .867664 .338357 .169539 .007044 .009817 .009801 .000191 .002751 -.000162 O2A .121695 .499396 .331926 .012467 .008826 .013610 -.003155 .005867 -.001246 O3A .103940 .261971 .578301 .008532 .022395 .020475 .000785 .004466 .013504 O1B .373889 .836792 .134805 .007349 .010502 .009671 .000214 .002998 -.000258 O2B .629044 .987291 .373286 .014641 .012154 .020885 -.005733 .010017 -.007235 O3B .604797 .708908 .480566 .007590 .020180 .013441 .000519 .003159 .007791