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 = 250 min _database_code_amcsd 0003992 9.7109 8.9437 5.2477 90 108.469 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 .255369 .016985 .227765 .1868 .010437 .011529 .007228 .000656 .000694 .001797 FeM2A .255369 .016985 .227765 .5939 .010437 .011529 .007228 .000656 .000694 .001797 CaM2A .255369 .016985 .227765 .0937 .010437 .011529 .007228 .000656 .000694 .001797 MnM2A .255369 .016985 .227765 .0254 .010437 .011529 .007228 .000656 .000694 .001797 NaM2A .255369 .016985 .227765 .0029 .010437 .011529 .007228 .000656 .000694 .001797 CaM2B .254379 .052024 .250193 .0973 .010276 MgM1 .250443 .654518 .231293 .7300 .008093 .006802 .007662 .000146 .002403 .000400 Fe2+M1 .250443 .654518 .231293 .2415 .008093 .006802 .007662 .000146 .002403 .000400 Fe3+M1 .250443 .654518 .231293 .0148 .008093 .006802 .007662 .000146 .002403 .000400 TiM1 .250443 .654518 .231293 .0101 .008093 .006802 .007662 .000146 .002403 .000400 MnM1 .250443 .654518 .231293 .0036 .008093 .006802 .007662 .000146 .002403 .000400 SiA .042780 .340531 .277224 .006318 .006352 .009809 -.000548 .003477 -.000611 SiB .549561 .837388 .238439 .9840 .006602 .006230 .007792 -.000950 .002750 -.000881 AlB .549561 .837388 .238439 .0160 .006602 .006230 .007792 -.000950 .002750 -.000881 O1A .867607 .338382 .169391 .006799 .009828 .009211 .000196 .002431 -.000182 O2A .121791 .499300 .331729 .013106 .008417 .013068 -.003348 .006254 -.001415 O3A .104162 .262175 .578144 .009198 .022251 .020564 .000269 .004081 .013764 O1B .373661 .836811 .134652 .007207 .009612 .010073 .000289 .003052 -.000312 O2B .629184 .987272 .373287 .015278 .011497 .021002 -.006026 .010266 -.007419 O3B .604825 .708772 .480497 .007975 .019475 .013004 .000305 .003367 .007564