Card No: 12278       Created: 29/01/25    Last edition: 02/04/2026

Name: SIUDAITE
Specification: [1], structure type - eudialyte, DF
Formula: Na8Mn2+2NaCa6Fe3+3Zr3NbSi25O74(OH)2Cl · 5H2O
Symmetry Class: trigonal
Space Group: R 3m
Unit Cell
Parameters:
a = 14.1885 | c = 29.8310
Number of Formula Unit: Z = 3Unit Cell Volume, Å3: Vc = 5200.81
Number of Atomic Position
per full Unit Cell
:
P/U = 444 Molar Volume, cm3/mol: Vm = 1044.21
Number of Reflexes used in
Structure Determination
:

NR = 2436
X-ray density, g/cm3: p = 2.92
R-factor: R = 0.0221MU, 1/cm: µ = 261.474
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 89.511
Theta-Interval for CPDP: T/I = 1-45