Card No: 7611       Created: 07/12/2009    Last edition: 21/06/2013

Name: NATROJAROSITE
Specification: [2], structure type - alunite, syn
Formula: (Na,K)Fe3[SO4]2(OH)6
Symmetry Class: trigonal
Space Group: R 3(-)m
Unit Cell
Parameters:
a = 7.3101 | c = 16.7658
Number of Formula Unit: Z = 3Unit Cell Volume, Å3: Vc = 775.89
Number of Atomic Position
per full Unit Cell
:
P/U = 78 Molar Volume, cm3/mol: Vm = 155.78
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 3.18
R-factor: -MU, 1/cm: µ = 159.429
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 50.186
Theta-Interval for CPDP: T/I = 1-45