Card No: 291       Created: 16/09/1992    Last edition: 29/11/2017

Name: APJOHNITE
Specification: [1], structure type - halotrichite
Formula: MnAl2[SO4]4 · 22H2O
Symmetry Class: monoclinic-beta
Space Group: P 2(1)/c
Unit Cell
Parameters:
a = 6.1980 | b = 24.3470 | c = 21.2660 | beta = 100.2800
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 3157.58
Number of Atomic Position
per full Unit Cell
:
P/U = 356 Molar Volume, cm3/mol: Vm = 475.48
Number of Reflexes used in
Structure Determination
:

NR = 2423
X-ray density, g/cm3: p = 1.87
R-factor: R = 0.0390MU, 1/cm: µ = 77.211
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 41.280
Theta-Interval for CPDP: T/I = 1-30