Staurolite

Al_4.486Co_0.138Fe_0.513HMg_0.308Mn_0.01O₁₂Si_1.864Ti_0.032Zn_0.01

Bringhurst, K. N.Griffen, D. T.

American Mineralogist (1986) 71, 1466-1472

a=7.872Å   b=16.608Å   c=5.648Å

α=90°   β=90.04°   γ=90°