Chestermanite

Al_0.66B₄Fe_1.475Mg_9.314O₂₀Sb_0.482Ti_0.069

Alfredsson, V.Bovin, J. O.Norrestam, R.Terasaki, O.

Acta Chemica Scandinavica (1991) 45, 797-804

a=18.5250Å   b=12.272Å   c=3.0218Å

α=90°   β=90°   γ=90°