Card No: 12274       Created: 11/03/25    Last edition: 02/04/2026

Name: RUNDQVISTITE-(Ce)
Specification: [1], structure type - vladykinite
Formula: Na3[Sr3Ce]Zn2Si8O24
Symmetry Class: monoclinic-beta
Space Group: P 2(1)/c
Unit Cell
Parameters:
a = 5.1934 | b = 7.8934 | c = 26.0110 | beta = 90.0000
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 1066.28
Number of Atomic Position
per full Unit Cell
:
P/U = 82 Molar Volume, cm3/mol: Vm = 321.13
Number of Reflexes used in
Structure Determination
:

NR = 3184
X-ray density, g/cm3: p = 3.67
R-factor: R = 0.0276MU, 1/cm: µ = 341.377
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 93.023
Theta-Interval for CPDP: T/I = 1-45