Tetrahydrogen dimanganese octamanganese(IV) oxide

H₄Mn₁₀O₂₀

Vaux, GBennett, H

Mineralogical Magazine and Journal of the Mineralogical Society (1876- 1968) (1937) 24, 521-526

a=4.38Å   b=4.38Å   c=2.86Å

α=90°   β=90°   γ=90°