Card No: 7220       Created: 14/02/2008    Last edition: 23/03/2012

Name: MOHRITE
Specification: [1], structure type - picromerite, syn
Formula: [NH4]2Fe2+[SO4]2 · 6H2O
Symmetry Class: monoclinic-beta
Space Group: P 2(1)/a
Unit Cell
Parameters:
a = 9.1670 | b = 12.4050 | c = 6.3050 | beta = 106.7100
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 686.71
Number of Atomic Position
per full Unit Cell
:
P/U = 78 Molar Volume, cm3/mol: Vm = 206.81
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 1.93
R-factor: -MU, 1/cm: µ = 77.760
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 40.190
Theta-Interval for CPDP: T/I = 1-45