Card No: 12011       Created: 18/06/24    Last edition: 27/03/2026

Name: ARMELLINOITE-(Ce)
Specification: [1], DF
Formula: Ca4Ce????[AsO4]4 · H2O
Symmetry Class: tetragonal
Space Group: *I 4(1)/a
Unit Cell
Parameters:
a = 11.7490 | c = 12.0300
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 1660.61
Number of Atomic Position
per full Unit Cell
:
P/U = 124 Molar Volume, cm3/mol: Vm = 250.06
Number of Reflexes used in
Structure Determination
:

NR = 1275
X-ray density, g/cm3: p = 3.48
R-factor: R = 0.0284MU, 1/cm: µ = 613.243
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 176.381
Theta-Interval for CPDP: T/I = 1-45