Card No: 2056       Created: 26/10/1989    Last edition: 13/01/2009

Name: FORSTERITE
Specification: [23], structure type - olivine
Formula: (Fe,Mg,Mn,Ca)2SiO4
Symmetry Class: orthorhombic
Space Group: P bnm
Unit Cell
Parameters:
a = 4.7850 | b = 10.3250 | c = 6.0380
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 298.31
Number of Atomic Position
per full Unit Cell
:
P/U = 28 Molar Volume, cm3/mol: Vm = 44.92
Number of Reflexes used in
Structure Determination
:

NR = 924
X-ray density, g/cm3: p = 3.78
R-factor: R = 0.0800MU, 1/cm: µ = 177.986
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 47.064
Theta-Interval for CPDP: T/I = 1-45