Lizardite

H₄Mg₃O₉Si₂

Auzende, A. L.Pellenq, R. J. M.Devouard, B.Baronnet, A.Grauby, O.

Physics and Chemistry of Minerals (2006) 33, 266-275

a=5.434Å   b=5.434Å   c=7.153Å

α=90°   β=90°   γ=120°