Pigeonite
Clark J R, Ross M, Appleman D E
American Mineralogist 56 (1971) 888-908
Crystal chemistry of a lunar pigeonite
class b data refinement
_database_code_amcsd 0000248
9.678 8.905 5.227 90 108.71 90 P2_1/c
atom     x     y     z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Mg1  .2506 .6548 .2300 .67  .55
Fe1  .2506 .6548 .2300 .33  .55
Mg2  .2564 .0167 .2246 .41  .51  .0017  .0018  .0038  .0003  .0006  .0004
Fe2  .2564 .0167 .2246 .59  .51  .0017  .0018  .0038  .0003  .0006  .0004
SiA  .0434 .3399 .2844      .40
SiB  .5520 .8364 .2368      .34
O1A  .8684 .3373 .1740      .57
O1B  .3755 .8357 .1296      .43
O2A  .1231 .4977 .3312      .78
O2B  .6314 .9850 .3814      .59
O3A  .1048 .2683 .5917     1.12  .0022  .0054  .0095  .0000  .0016  .0033
O3B  .6045 .7047 .4707     1.05  .0022  .0044  .0110  .0007  .0022  .0026