Card No: 1589       Created: 27/09/1991    Last edition: 13/01/2009

Name: FORSTERITE
Specification: [7], structure type - olivine, at 79 kbar
Formula: Mg2SiO4
Symmetry Class: orthorhombic
Space Group: P bnm
Unit Cell
Parameters:
a = 4.6880 | b = 9.9930 | c = 5.8610
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 274.57
Number of Atomic Position
per full Unit Cell
:
P/U = 28 Molar Volume, cm3/mol: Vm = 41.35
Number of Reflexes used in
Structure Determination
:

NR = 114
X-ray density, g/cm3: p = 3.40
R-factor: R = 0.0330MU, 1/cm: µ = 104.334
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 30.665
Theta-Interval for CPDP: T/I = 1-45