Pigeonite
Alvaro M, Nestola F, Ballaran T B, Camara F, Domeneghetti M C, Tazzoli V
American Mineralogist 95 (2010) 300-311
High-pressure phase transition of a natural pigeonite
Locality: Parana, Brazil
Note: P = 3.167 GPa
_database_code_amcsd 0005007
9.621 8.827 5.199 90 107.82 90 P2_1/c
atom     x     y     z  occ  Uiso
FeA  .2509 .6565 .2286 .253 .0103
MgA  .2509 .6565 .2286 .747 .0103
FeB  .2573 .0219 .2245 .755 .0120
MgB  .2573 .0219 .2245 .124 .0120
CaB   .238  .033  .256 .121   .03
SiA  .0412 .3417 .2732  .99 .0099
AlA  .0412 .3417 .2732  .01 .0099
SiB  .5499 .8378 .2332  .99 .0071
AlB  .5499 .8378 .2332  .01 .0071
O1A  .8676 .3400  .171       .010
O1B  .3742 .8373  .131       .009
O2A  .1200 .5035  .330       .009
O2B  .6259 .9876  .370       .015
O3A   .104 .2623  .573       .022
O3B  .6070 .7059  .470       .015