Card No: 12257       Created: 25/04/25    Last edition: 02/04/2026

Name: MARKWELCHITE
Specification: [1]
Formula: TlPbSbS3
Symmetry Class: monoclinic-beta
Space Group: P 2(1)/c
Unit Cell
Parameters:
a = 8.9144 | b = 8.4513 | c = 8.6511 | beta = 108.7000
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 617.27
Number of Atomic Position
per full Unit Cell
:
P/U = 24 Molar Volume, cm3/mol: Vm = 92.95
Number of Reflexes used in
Structure Determination
:

NR = 1525
X-ray density, g/cm3: p = 6.77
R-factor: R = 0.0225MU, 1/cm: µ = 1455.339
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 214.919
Theta-Interval for CPDP: T/I = 1-45