Card No: 9422       Created: 13/04/15    Last edition: 06/10/2015

Name: COQUIMBITE
Specification: [4]
Formula: (Fe,Al)2[SO4]3 · 9H2O
Symmetry Class: trigonal
Space Group: P 3(-)1c
Unit Cell
Parameters:
a = 10.9170 | c = 17.0829
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 1763.19
Number of Atomic Position
per full Unit Cell
:
P/U = 188 Molar Volume, cm3/mol: Vm = 265.51
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 2.13
R-factor: -MU, 1/cm: µ = 93.486
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 43.882
Theta-Interval for CPDP: T/I = 1-45