Card No: 3247       Created: 20/01/1992    Last edition: 13/01/2009

Name: FORSTERITE
Specification: [26], structure type - olivine
Formula: [Mg1.79Fe0.21]SiO4
Symmetry Class: orthorhombic
Space Group: P nma
Unit Cell
Parameters:
a = 10.2391 | b = 6.0027 | c = 4.7673
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 293.01
Number of Atomic Position
per full Unit Cell
:
P/U = 28 Molar Volume, cm3/mol: Vm = 44.12
Number of Reflexes used in
Structure Determination
:

NR = 976
X-ray density, g/cm3: p = 3.34
R-factor: R = 0.0300MU, 1/cm: µ = 175.530
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 52.568
Theta-Interval for CPDP: T/I = 1-45