Card No: 1028       Created: 29/03/1988    Last edition: 13/01/2009

Name: CORUNDUM
Specification: [1], alpha, structure type - corundum
Formula: Al2O3
Symmetry Class: trigonal
Space Group: R 3(-)c
Unit Cell
Parameters:
a = 4.7540 | c = 12.9900
Number of Formula Unit: Z = 6Unit Cell Volume, Å3: Vc = 254.25
Number of Atomic Position
per full Unit Cell
:
P/U = 30 Molar Volume, cm3/mol: Vm = 25.52
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 3.99
R-factor: -MU, 1/cm: µ = 124.360
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 31.135
Theta-Interval for CPDP: T/I = 1-45