Lawsonite

Al₂CaH₄O₁₀Si₂

Sondergeld, P.Schranz, W.Troster, A.Armbruster, T.Giester, G.Kityk, A.Carpenter, M. A.

American Mineralogist (2005) 90, 448-456

a=5.8515Å   b=8.7768Å   c=13.1107Å

α=90°   β=90°   γ=90°