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 = 1.5 min _database_code_amcsd 0003972 9.7069 8.9427 5.2470 90 108.458 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 .255357 .016119 .227250 .1816 .009651 .009621 .005785 .000100 .000487 .002122 FeM2A .255357 .016119 .227250 .5984 .009651 .009621 .005785 .000100 .000487 .002122 CaM2A .255357 .016119 .227250 .0212 .009651 .009621 .005785 .000100 .000487 .002122 MnM2A .255357 .016119 .227250 .0254 .009651 .009621 .005785 .000100 .000487 .002122 NaM2A .255357 .016119 .227250 .0030 .009651 .009621 .005785 .000100 .000487 .002122 CaM2B .253789 .045020 .247902 .1703 .013910 MgM1 .250411 .654514 .231656 .7374 .008006 .006593 .007304 .000143 .002573 .000412 Fe2+M1 .250411 .654514 .231656 .2344 .008006 .006593 .007304 .000143 .002573 .000412 Fe3+M1 .250411 .654514 .231656 .0146 .008006 .006593 .007304 .000143 .002573 .000412 TiM1 .250411 .654514 .231656 .0101 .008006 .006593 .007304 .000143 .002573 .000412 MnM1 .250411 .654514 .231656 .0034 .008006 .006593 .007304 .000143 .002573 .000412 SiA .042720 .340577 .276584 .005822 .006021 .009676 -.000530 .003251 -.000553 SiB .549353 .837462 .238594 .9840 .006230 .006036 .007511 -.001044 .002723 -.000962 AlB .549353 .837462 .238594 .0160 .006230 .006036 .007511 -.001044 .002723 -.000962 O1A .867621 .338277 .168936 .006500 .009321 .009317 .000444 .002711 -.000098 O2A .121657 .499355 .331851 .012517 .008507 .012971 -.003232 .006001 -.001615 O3A .104283 .261634 .577003 .009026 .021681 .020183 .000826 .004325 .013801 O1B .373618 .836831 .134932 .007035 .010037 .009367 .000562 .003075 -.000015 O2B .628960 .987386 .372728 .014403 .012008 .020921 -.005888 .010055 -.007763 O3B .604900 .709593 .481671 .008141 .019371 .012865 .000731 .003453 .007678