AM_Thaumasite_1 Formula: Ca3 Si C S O25 H30 Name: Thaumasite Unit cell: 11.0538 11.0538 10.4111 90.0 90.0 120.0 , V=1101.67 Space group: P63 (173)

Jacobsen S D , Smyth J R , Swope R J , Physics and Chemistry of Minerals , 30 (2003) p.321-329, Thermal expansion of hydrated six-coordinated silicon in thaumasite,, Ca3Si(OH)6(CO3)(SO4).12H2O, Sample: T = 298 K, Locality: unknown