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 = 6 min _database_code_amcsd 0003974 9.7094 8.9457 5.2478 90 108.468 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 .255312 .016641 .227667 .1854 .009904 .011010 .006618 .000329 .000592 .001985 FeM2A .255312 .016641 .227667 .5952 .009904 .011010 .006618 .000329 .000592 .001985 CaM2A .255312 .016641 .227667 .0630 .009904 .011010 .006618 .000329 .000592 .001985 MnM2A .255312 .016641 .227667 .0256 .009904 .011010 .006618 .000329 .000592 .001985 NaM2A .255312 .016641 .227667 .0029 .009904 .011010 .006618 .000329 .000592 .001985 CaM2B .253923 .048016 .249295 .1279 .011915 MgM1 .250425 .654603 .231579 .7296 .007825 .006789 .007520 .000168 .002565 .000405 Fe2+M1 .250425 .654603 .231579 .2418 .007825 .006789 .007520 .000168 .002565 .000405 Fe3+M1 .250425 .654603 .231579 .0150 .007825 .006789 .007520 .000168 .002565 .000405 TiM1 .250425 .654603 .231579 .0100 .007825 .006789 .007520 .000168 .002565 .000405 MnM1 .250425 .654603 .231579 .0036 .007825 .006789 .007520 .000168 .002565 .000405 SiA .042758 .340573 .276767 .005906 .006228 .010062 -.000616 .003522 -.000601 SiB .549370 .837427 .238628 .9840 .006201 .006264 .007536 -.000958 .002797 -.000938 AlB .549370 .837427 .238628 .0160 .006201 .006264 .007536 -.000958 .002797 -.000938 O1A .867617 .338425 .169183 .006569 .009391 .009453 .000264 .002723 -.000229 O2A .121639 .499361 .331979 .012925 .008422 .013534 -.003299 .006200 -.001284 O3A .104130 .261683 .577197 .008475 .022989 .020463 .000556 .004295 .014033 O1B .373589 .836780 .134829 .006558 .010320 .009512 .000345 .002769 -.000050 O2B .628991 .987392 .372964 .014473 .011796 .021076 -.006279 .009897 -.007631 O3B .604643 .709219 .480969 .007712 .020131 .012885 .000563 .003560 .007748