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 = 650 C for t = 120 min _database_code_amcsd 0003980 9.7084 8.9414 5.2476 90 108.505 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 .255253 .016692 .228060 .1484 .009742 .010386 .007324 .000120 .000639 .001842 FeM2A .255253 .016692 .228060 .6316 .009742 .010386 .007324 .000120 .000639 .001842 CaM2A .255253 .016692 .228060 .0475 .009742 .010386 .007324 .000120 .000639 .001842 MnM2A .255253 .016692 .228060 .0261 .009742 .010386 .007324 .000120 .000639 .001842 NaM2A .255253 .016692 .228060 .0029 .009742 .010386 .007324 .000120 .000639 .001842 CaM2B .253402 .046406 .250863 .1434 .015519 MgM1 .250474 .654678 .232178 .7679 .008028 .006644 .008651 .000138 .002775 .000406 Fe2+M1 .250474 .654678 .232178 .2043 .008028 .006644 .008651 .000138 .002775 .000406 Fe3+M1 .250474 .654678 .232178 .0149 .008028 .006644 .008651 .000138 .002775 .000406 TiM1 .250474 .654678 .232178 .0100 .008028 .006644 .008651 .000138 .002775 .000406 MnM1 .250474 .654678 .232178 .0029 .008028 .006644 .008651 .000138 .002775 .000406 SiA .042739 .340483 .275944 .006271 .005976 .010506 -.000467 .003419 -.000606 SiB .549405 .837506 .239038 .9840 .006532 .005922 .008511 -.001018 .002879 -.000960 AlB .549405 .837506 .239038 .0160 .006532 .005922 .008511 -.001018 .002879 -.000960 O1A .867623 .338072 .168394 .006945 .008870 .010343 .000552 .002561 .000061 O2A .121796 .499456 .332257 .012463 .007706 .015098 -.003095 .006431 -.001860 O3A .104273 .261443 .577367 .009529 .023048 .021750 .000771 .004716 .014694 O1B .373641 .836556 .135162 .006955 .009545 .010658 .000662 .003365 .000231 O2B .628838 .987875 .372137 .014697 .011472 .021551 -.005798 .010660 -.007682 O3B .604938 .709177 .481186 .008496 .020463 .014511 .000443 .004128 .007844