Andremeyerite
Cannillo E, Mazzi F, Rossi G
American Mineralogist 73 (1988) 608-612
Crystal structure of andremeyerite, BaFe(Fe,Mn,Mg)Si2O7
_database_code_amcsd 0001164
7.488 13.785 7.085 90 118.23 90 P2_1/c
atom      x     y     z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Ba    .4893 .1434 .2940      .0061  .0011  .0067 -.0002  .0031 -.0002
Fe1  -.0024 .2439 .3058      .0033  .0010  .0056  .0001  .0014  .0000
Fe2  -.0380 .5016 .2115 .92  .0040  .0010  .0065 -.0002  .0019 -.0003
Mg2  -.0380 .5016 .2115 .08  .0040  .0010  .0065 -.0002  .0019 -.0003
SiA   .2765 .3908 .2023      .0030  .0010  .0052  .0002  .0012  .0003
SiB   .7241 .3833 .3877      .0032  .0008  .0046  .0001  .0016  .0002
O1A   .2262 .5001 .1055      .0049  .0013  .0056  .0004  .0006  .0007
O1B   .7251 .4833 .2737      .0072  .0014  .0132  .0007  .0058  .0013
O2A   .2573 .3118 .0249      .0037  .0019  .0074 -.0006  .0012 -.0022
O2B   .7270 .2903 .2481      .0049  .0013  .0143 -.0003  .0046 -.0017
O3A   .1229 .3714 .3016      .0063  .0010  .0136 -.0002  .0064  .0006
O3B   .9090 .3763 .6290      .0049  .0013  .0091 -.0005  .0010  .0002
O4    .5104 .3784 .4021      .0044  .0014  .0017 -.0003  .0007  .0000