Nb2 O6 U0.5
Labeau M, Grey I, Coubert J, Chenevas J, Collomb A, Guitel J
Acta Crystallographica B41 (1985) 33-41
The structure of the a-cation deficient Perovskite U Nb4 O12
_cod_database_code 1008281
_database_code_amcsd 0016203
3.856 3.856 7.796 90 90 90 P4/mmm
atom  x  y     z occ
U1    0  0     0  .5
Nb1  .5 .5 .2611
O1   .5 .5     0
O2   .5 .5    .5
O3    0 .5 .2285