Card No: 12186       Created: 26/11/24    Last edition: 27/03/2026

Name: HARMUNITE
Specification: [7], structure type - harmunite, Al-analogue, at 53.9 GPa
Formula: Ca(Fe,Al)2O4
Symmetry Class: orthorhombic
Space Group: P nma
Unit Cell
Parameters:
a = 8.3001 | b = 2.7527 | c = 9.7030
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 221.69
Number of Atomic Position
per full Unit Cell
:
P/U = 28 Molar Volume, cm3/mol: Vm = 33.38
Number of Reflexes used in
Structure Determination
:

NR = 254
X-ray density, g/cm3: p = 5.85
R-factor: R = 0.0509MU, 1/cm: µ = 482.763
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 82.504
Theta-Interval for CPDP: T/I = 1-45