K4 (H5 O2) (Np O2)3 (Mo O4)4 (H2 O)4

H₁₃K₄Mo₄Np₃O₂₈

Grigor'ev, M.C.Charushnikova, I.A.Fedoseev, A.M.Regel', L.L.Budantseva, N.A.Baturin, N.A.

Radiokhimiya (1991) 33, 19-27

a=7.305Å   b=8.676Å   c=12.345Å

α=68.77°   β=73.15°   γ=85.02°