Kaolinite

Al₂H₄O₉Si₂

Richard, D.Rendtorff, N. M.

Applied Clay Science (2019) 169, 67-73

a=5.17375Å   b=8.98502Å   c=7.35224Å

α=91.68430°   β=105.12793°   γ=89.75488°