Calcite

CCaO₃

Prencipe, M.Pascale, F.Zicovich-Wilson C MSaunders, V. R.Orlando, R.Dovesi, R.

Physics and Chemistry of Minerals (2004) 31, 559-564

a=5.0492Å   b=5.0492Å   c=17.3430Å

α=90°   β=90°   γ=120°