Yoderite
Higgins J B, Ribbe P H, Nakajima Y
American Mineralogist 67 (1982) 76-84
An ordering model for the commensurate antiphase structure of yoderite
Ordered, T = 20 deg C
Note: the sample is from Mautia Hill, Tanzania
_database_code_amcsd 0000855
8.022 5.816 7.250 90 104.9 90 P2_1/m
atom     x     y     z occ Biso
Si1  .0637   .25 .7984     0.46
Si2  .3396   .75 .8024     0.61
Al1  .2952 .0051 .1776 .75 0.56
Mg1  .2952 .0051 .1776 .25 0.56
Al2  .3888   .25 .6301 .50 0.72
Mg2  .3888   .25 .6301 .50 0.72
Al3  .0557   .25 .3539 .84 0.75
Fe   .0557   .25 .3539 .16 0.75
O1   .0573 .9801 .2147     0.69
O2   .4525 .9760 .7812     1.33
O3   .1478   .25 .6145     0.91
O4   .2206   .25 .9928     0.72
O5   .2979   .25 .3615     0.93
O6   .1652   .75 .6322     0.81
O7   .2830   .75 .0045     1.06
O8   .3597   .75 .3643     1.16