Magnussonite
Moore P B, Araki T
American Mineralogist 64 (1979) 390-401
Magnussonite, manganese arsenite, a fluorite derivative structure
_database_code_amcsd 0000713
19.680 19.680 19.680 90 90 90 Ia-3d
atom      x      y       z  occ
Mn1     .25   .375       0  .95
Mg1     .25   .375       0  .05
Mn2  .23263   .125  .01737  .33
Cu2  .23263   .125  .01737  .17
Mn3    .375 .26423  .01423  .94
Mg3    .375 .26423  .01423  .06
Mn4  .11266 .36266    .125  .90
Mg4  .11266 .36266    .125  .10
Mn5  .00750 .01340 -.00073 .158
As   .49912 .36620  .00839
O1   .56979 .32014  .03660
O2   .46116 .31841 -.05683
O3   .44445 .33379  .07270
Cl   .14136 .10864    .125 .267
OH   .14136 .10864    .125 .067