Card No: 3333       Created: 19/09/1990    Last edition: 14/06/2018

Name: OMPHACITE
Specification: [4], structure type - omphacite, Fe
Formula: [Na0.53Ca0.47][Al0.41Fe0.52Ti0.07]Si2O6
Symmetry Class: monoclinic-beta
Space Group: P 2/n
Unit Cell
Parameters:
a = 9.6220 | b = 8.8260 | c = 5.2790 | beta = 106.9200
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 428.91
Number of Atomic Position
per full Unit Cell
:
P/U = 40 Molar Volume, cm3/mol: Vm = 64.59
Number of Reflexes used in
Structure Determination
:

NR = 843
X-ray density, g/cm3: p = 3.48
R-factor: R = 0.0470MU, 1/cm: µ = 225.402
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 64.690
Theta-Interval for CPDP: T/I = 1-45