Card No: 12508       Created: 2/03/26    Last edition: 18/05/2026

Name: VIELLEAUREITE-(Ce)
Specification: [1], structure type - epidote
Formula: Mn2+Ce(MgAlMn2+)[Si2O7][SiO4]F(OH)
Symmetry Class: monoclinic-beta
Space Group: P 2(1)/m
Unit Cell
Parameters:
a = 8.8238 | b = 5.7131 | c = 10.0034 | beta = 112.8000
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 464.80
Number of Atomic Position
per full Unit Cell
:
P/U = 44 Molar Volume, cm3/mol: Vm = 139.98
Number of Reflexes used in
Structure Determination
:

NR = 1565
X-ray density, g/cm3: p = 4.24
R-factor: R = 0.0575MU, 1/cm: µ = 628.613
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 148.422
Theta-Interval for CPDP: T/I = 1-45