Whitmoreite

Fe_2.59H₁₀Mn_0.27O₁₄P₂

Moore, P. B.Kampf, A. R.Irving, A. J.

American Mineralogist (1974) 59, 900-905

a=10.00Å   b=9.73Å   c=5.471Å

α=90°   β=93.8°   γ=90°