Amesite

Al_1.989H₄Mg_1.962O₉Si_1.026

Anderson, C. S.Bailey, S. W.

American Mineralogist (1981) 66, 185-195

a=5.307Å   b=9.195Å   c=14.067Å

α=90.1°   β=90.3°   γ=90°