Card No: 4719       Created: 02/02/1989    Last edition: 25/05/2022

Name: THAUMASITE
Specification: [1], structure type - thaumasite
Formula: Ca3Si(OH)6CO3SO4 · 12H2O
Symmetry Class: hexagonal
Space Group: P 6(3)
Unit Cell
Parameters:
a = 11.0300 | c = 10.3960
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 1095.34
Number of Atomic Position
per full Unit Cell
:
P/U = 122 Molar Volume, cm3/mol: Vm = 329.88
Number of Reflexes used in
Structure Determination
:

NR = 1287
X-ray density, g/cm3: p = 1.89
R-factor: R = 0.0270MU, 1/cm: µ = 87.007
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 46.105
Theta-Interval for CPDP: T/I = 1-45