H Sm (P2 O7) (H2 O)4

H₉O₁₁P₂Sm

Chehimi-Moumen, F.Ferid, M.Ben Hassen-Chehimi, D.Trabelsi-Ayadi, M.

Solid State Sciences (2002) 4, 979-983

a=6.635Å   b=11.529Å   c=11.7581Å

α=90°   β=92.02°   γ=90°