Na[(UO2)(AsO4)](H2O)3
Locock A J, Burns P C, Duke M J M, Flynn T M
The Canadian Mineralogist 42 (2004) 973-996
Monovalent cations in structures of the meta-autunite group
Sample: NaUAs
7.1504 7.1504 17.325 90 90 90 *P4/ncc
.25 -.25 0
atom    x     y     z occ Uiso
U     .25   .25 .0542     .018
As    .75   .25     0     .020
O1    .25   .25 .1576     .031
O2    .25   .25 .9515     .036
O3  .7122 .0665 .4420     .029
O4  .1625 .9864 .3068 .75 .247
Na4 .1625 .9864 .3068 .25 .247