Card No: 828       Created: 07/04/1992    Last edition: 13/01/2009

Name: CHALCOCITE
Specification: [1], structure type - chalcocite, DF
Formula: Cu2S
Symmetry Class: hexagonal
Space Group: P 6(3)/mmc
Unit Cell
Parameters:
a = 3.9500 | c = 6.7500
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 91.21
Number of Atomic Position
per full Unit Cell
:
P/U = 14 Molar Volume, cm3/mol: Vm = 27.47
Number of Reflexes used in
Structure Determination
:

NR = 37
X-ray density, g/cm3: p = 5.80
R-factor: R = 0.1800MU, 1/cm: µ = 349.198
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 60.181
Theta-Interval for CPDP: T/I = 1-45