Card No: 7174       Created: 16/04/2007    Last edition: 12/03/2015

Name: FORSTERITE
Specification: [68], structure type - olivine, at 104oC
Formula: (Mg,Fe)2SiO4
Symmetry Class: orthorhombic
Space Group: P bnm
Unit Cell
Parameters:
a = 4.7961 | b = 10.3557 | c = 6.0479
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 300.38
Number of Atomic Position
per full Unit Cell
:
P/U = 28 Molar Volume, cm3/mol: Vm = 45.23
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 3.76
R-factor: -MU, 1/cm: µ = 431.529
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 114.707
Theta-Interval for CPDP: T/I = 1-45