Card No: 4827       Created: 24/03/1988    Last edition: 20/12/2016

Name: TRECHMANNITE
Specification: [1]
Formula: AgAsS2
Symmetry Class: trigonal
Space Group: R 3(-)
Unit Cell
Parameters:
a = 13.9800 | c = 9.1200
Number of Formula Unit: Z = 18Unit Cell Volume, Å3: Vc = 1543.62
Number of Atomic Position
per full Unit Cell
:
P/U = 72 Molar Volume, cm3/mol: Vm = 51.65
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 4.78
R-factor: -MU, 1/cm: µ = 686.729
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 143.683
Theta-Interval for CPDP: T/I = 1-45