Card No: 3248       Created: 24/01/1992    Last edition: 13/01/2009

Name: FORSTERITE
Specification: [27], structure type - olivine, syn
Formula: [Mg1.79Fe0.21]SiO4
Symmetry Class: orthorhombic
Space Group: P nma
Unit Cell
Parameters:
a = 10.2424 | b = 6.0028 | c = 4.7673
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 293.11
Number of Atomic Position
per full Unit Cell
:
P/U = 28 Molar Volume, cm3/mol: Vm = 44.14
Number of Reflexes used in
Structure Determination
:

NR = 978
X-ray density, g/cm3: p = 3.34
R-factor: R = 0.0360MU, 1/cm: µ = 177.312
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 53.063
Theta-Interval for CPDP: T/I = 1-45