Card No: 12213       Created: 4/12/24    Last edition: 27/03/2026

Name: PARASYMPLESITE
Specification: [2], structure type - vivianite
Formula: Fe3[AsO4]2 · 8[H2O]
Symmetry Class: monoclinic-beta
Space Group: C 2/m
Unit Cell
Parameters:
a = 10.3519 | b = 13.6009 | c = 4.7998 | beta = 103.8000
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 656.24
Number of Atomic Position
per full Unit Cell
:
P/U = 74 Molar Volume, cm3/mol: Vm = 197.64
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 2.98
R-factor: -MU, 1/cm: µ = 164.878
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 55.285
Theta-Interval for CPDP: T/I = 1-45