Card No: 900       Created: 28/11/1997    Last edition: 13/01/2009

Name: CHRYSOBERYL
Specification: [5], structure type - chrysoberyl, at 690oC
Formula: Al2BeO4
Symmetry Class: orthorhombic
Space Group: P bnm
Unit Cell
Parameters:
a = 4.4457 | b = 9.4491 | c = 5.5011
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 231.09
Number of Atomic Position
per full Unit Cell
:
P/U = 28 Molar Volume, cm3/mol: Vm = 34.80
Number of Reflexes used in
Structure Determination
:

NR = 300
X-ray density, g/cm3: p = 3.65
R-factor: R = 0.0230MU, 1/cm: µ = 96.890
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 26.558
Theta-Interval for CPDP: T/I = 1-45