| bentorite | Ca6(Cr,Al)2(SO4)3(OH)12·26H2O |
| charlesite | Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12·26H2O |
| ettringite | Ca6Al2(SO4)3(OH)12·26H2O |
| jouravskite | Ca6Mn2(SO4,CO3)4(OH)12·26H2O |
| sturmanite | Ca6(Fe,Al,Mn)2(SO4)2[B(OH)4](OH)12·25H2O |
| thaumasite | Ca6Si2(CO3)2(SO4)2(OH)12·24H2O |