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 = 25 min _database_code_amcsd 0003989 9.7086 8.9436 5.2464 90 108.491 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 .255343 .017083 .227875 .1809 .009868 .011695 .007013 .000707 .000697 .001897 FeM2A .255343 .017083 .227875 .5998 .009868 .011695 .007013 .000707 .000697 .001897 CaM2A .255343 .017083 .227875 .0918 .009868 .011695 .007013 .000707 .000697 .001897 MnM2A .255343 .017083 .227875 .0254 .009868 .011695 .007013 .000707 .000697 .001897 NaM2A .255343 .017083 .227875 .0030 .009868 .011695 .007013 .000707 .000697 .001897 CaM2B .253806 .052197 .250425 .0991 .012219 MgM1 .250453 .654551 .231361 .7378 .008041 .007175 .007714 .000087 .002570 .000422 Fe2+M1 .250453 .654551 .231361 .2339 .008041 .007175 .007714 .000087 .002570 .000422 Fe3+M1 .250453 .654551 .231361 .0148 .008041 .007175 .007714 .000087 .002570 .000422 TiM1 .250453 .654551 .231361 .0101 .008041 .007175 .007714 .000087 .002570 .000422 MnM1 .250453 .654551 .231361 .0034 .008041 .007175 .007714 .000087 .002570 .000422 SiA .042783 .340542 .277152 .006036 .006595 .010076 -.000511 .003321 -.000719 SiB .549492 .837440 .238445 .9840 .006405 .006396 .007766 -.001012 .002780 -.000951 AlB .549492 .837440 .238445 .0160 .006405 .006396 .007766 -.001012 .002780 -.000951 O1A .867637 .338348 .169093 .006772 .009877 .009668 .000102 .002454 -.000101 O2A .121619 .499310 .331960 .012958 .008570 .013053 -.003038 .006049 -.001390 O3A .104192 .261874 .577904 .008636 .022006 .020389 .000708 .004432 .013121 O1B .373669 .836715 .134376 .006945 .010397 .009739 .000434 .002994 -.000251 O2B .629019 .987257 .373130 .014413 .012079 .020820 -.005423 .010095 -.007376 O3B .604865 .709118 .480576 .007414 .019925 .013782 .000533 .002983 .007893