Card No: 1911       Created: 20/10/1998    Last edition: 27/12/2017

Name: HELMUTWINKLERITE
Specification: [1]
Formula: PbZn2[AsO4]2[OH,H2O]2
Symmetry Class: triclinic
Space Group: P 1(-)
Unit Cell
Parameters:
a = 5.6060 | b = 5.6100 | c = 7.6170 | alpha = 70.1900 | beta = 69.9100 | gamma = 69.1800
Number of Formula Unit: Z = 1Unit Cell Volume, Å3: Vc = 203.77
Number of Atomic Position
per full Unit Cell
:
P/U = 15 Molar Volume, cm3/mol: Vm = 122.74
Number of Reflexes used in
Structure Determination
:

NR = 662
X-ray density, g/cm3: p = 5.28
R-factor: R = 0.0290MU, 1/cm: µ = 743.218
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 140.836
Theta-Interval for CPDP: T/I = 1-45