(Fe1.4 Mg0.6) (Fe0.16 Al3.84) Si2 O10 (O H)4

Al_3.84Fe_1.56H₄Mg_0.6O₁₄Si₂

Koch-Mueller, M.Kahlenberg, V.Schmidt, C.Wirth, R.

Physics and Chemistry of Minerals (Germany) (2000) 27, 703-712

a=5.4744Å   b=5.4766Å   c=9.1505Å

α=83.53°   β=76.68°   γ=60.06°