Metavivianite

Fe₃H₁₄O₁₆P₂

Chukanov, N. V.Scholz, R.Aksenov, S. M.Rastsvetaeva, R. K.Pekov, I. V.Belakovskiy, D. I.Krambrock, K.Paniago, R. M.Righi, A.Martins, R. F.Belotti, F. M.Bermanec, V.

Mineralogical Magazine (2012) 76, 725-741

a=7.989Å   b=9.321Å   c=4.629Å

α=97.34°   β=95.96°   γ=108.59°