Pigeonite
Camara F, Carpenter M A, Domeneghetti M C, Tazzoli V
Physics and Chemistry of Minerals 29 (2002) 331-340
Non-convergent ordering and displacive phase transition in pigeonite:
in situ HT XRD study
Sample: hga, T = 25 C
Locality: from rhyodacite, Parana, Brazil
_database_code_amcsd 0008637
9.719 8.947 5.251 90 108.49 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)
MgM1 .2506 .6548 .2317 .7668 .006   .007   .006   .007   .000   .003   .000
FeM1 .2506 .6548 .2317 .2082 .006   .007   .006   .007   .000   .003   .000
MnM1 .2506 .6548 .2317 .0067 .006   .007   .006   .007   .000   .003   .000
CaM1 .2506 .6548 .2317 .0183 .006   .007   .006   .007   .000   .003   .000
MgM2 .2552 .0192 .2294 .1596 .011   .009   .016   .008   .001   .001   .003
FeM2 .2552 .0192 .2294 .6245 .011   .009   .016   .008   .001   .001   .003
MnM2 .2552 .0192 .2294 .0206 .011   .009   .016   .008   .001   .001   .003
CaM2 .2552 .0192 .2294 .1953 .011   .009   .016   .008   .001   .001   .003
SiA  .0426 .3405 .2761       .007   .006   .006   .010  -.001   .004  -.001
SiB  .5493 .8374 .2382       .006   .006   .005   .008  -.001   .003  -.001
O1A  .8673 .3383 .1685       .009   .007   .009   .010   .000   .002   .000
O1B  .3735 .8367 .1342       .009   .007   .009   .011   .000   .003   .001
O2A  .1215 .4994 .3316       .011   .012   .007   .014  -.026   .006  -.001
O2B  .6286 .9881 .3719       .014   .014   .011   .021  -.006   .011  -.008
O3A  .1042 .2605 .5758       .017   .007   .022   .021   .002   .004   .013
O3B  .6050 .7100 .4806       .013   .008   .017   .014   .000   .003   .006