Card No: 3257       Created: 30/09/1992    Last edition: 23/04/2015

Name: FORSTERITE
Specification: [36], structure type - olivine
Formula: (Mg,Fe)2SiO4
Symmetry Class: orthorhombic
Space Group: P bnm
Unit Cell
Parameters:
a = 4.7624 | b = 10.2243 | c = 5.9922
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 291.77
Number of Atomic Position
per full Unit Cell
:
P/U = 28 Molar Volume, cm3/mol: Vm = 43.94
Number of Reflexes used in
Structure Determination
:

NR = 625
X-ray density, g/cm3: p = 3.23
R-factor: R = 0.0270MU, 1/cm: µ = 152.007
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 47.099
Theta-Interval for CPDP: T/I = 1-45