Card No: 12430       Created: 10/12/25    Last edition: 10/04/2026

Name: RYABCHIKOVITE
Specification: [1], structure type - pigeonite
Formula: CuMg[Si2O6]
Symmetry Class: monoclinic-beta
Space Group: P 2(1)/c
Unit Cell
Parameters:
a = 9.7310 | b = 8.9290 | c = 5.2210 | beta = 110.0000
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 426.28
Number of Atomic Position
per full Unit Cell
:
P/U = 40 Molar Volume, cm3/mol: Vm = 64.19
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 3.74
R-factor: -MU, 1/cm: µ = 137.193
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 36.696
Theta-Interval for CPDP: T/I = 1-45