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 = 3.172 GPa
_database_code_amcsd 0005008
9.622 8.861 5.181 90 107.92 90 P2_1/c
atom     x     y     z  occ  Uiso
FeA  .2505 .6563 .2284 .253 .0100
MgA  .2505 .6563 .2284 .747 .0100
FeB  .2562 .0218 .2234 .755 .0111
MgB  .2562 .0218 .2234 .124 .0111
CaB   .251  .028  .277 .121   .03
SiA  .0418 .3417 .2740  .99 .0086
AlA  .0418 .3417 .2740  .01 .0086
SiB  .5497 .8380 .2334  .99 .0079
AlB  .5497 .8380 .2334  .01 .0079
O1A  .8668 .3381  .171       .008
O1B  .3741 .8374  .131       .008
O2A  .1187 .5021  .329       .012
O2B   .628 .9878  .371       .013
O3A   .103 .2616  .575       .020
O3B   .607 .7055  .471       .013