Card No: 1388       Created: 18/04/1990    Last edition: 17/03/2020

Name: ETTRINGITE
Specification: [1], structure type - ettringite
Formula: Ca6[Al(OH)6]2[SO4]3 · 26H2O
Symmetry Class: trigonal
Space Group: P 31c
Unit Cell
Parameters:
a = 11.2600 | c = 21.4800
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 2358.53
Number of Atomic Position
per full Unit Cell
:
P/U = 124 Molar Volume, cm3/mol: Vm = 710.32
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 1.72
R-factor: R = 0.0880MU, 1/cm: µ = 83.998
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 48.965
Theta-Interval for CPDP: T/I = 1-45