Clinochlore

Al_1.67Cr_0.28H₈Mg₅O₁₈Si_3.04

Phillips, T. L.Loveless, J. K.Bailey, S. W.

American Mineralogist (1980) 65, 112-122

a=5.327Å   b=9.227Å   c=14.356Å

α=90.45°   β=97.35°   γ=89.98°