Na[(UO2)(PO4)](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: NaUP
6.9616 6.9616 17.2677 90 90 90 *P4/ncc
.25 -.25 0
atom    x     y     z occ Uiso
U     .25   .25 .0499     .017
P     .75   .25     0     .021
O1    .25   .25 .1534     .032
O2    .25   .25 .9480     .032
O3  .7162 .0759 .4469     .028
O4   .170 .9794 .3099 .75 .188
Na4  .170 .9794 .3099 .25 .188