Card No: 54       Created: 09/10/2000    Last edition: 13/01/2009

Name: AKERMANITE
Specification: [14], "distorted" structure type - melilite, Co, syn, at 130oK
Formula: Ca2CoSi2O7
Symmetry Class: tetragonal
Space Group: P 4(-)
Unit Cell
Parameters:
a = 7.8200 | c = 5.0140
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 306.62
Number of Atomic Position
per full Unit Cell
:
P/U = 24 Molar Volume, cm3/mol: Vm = 92.34
Number of Reflexes used in
Structure Determination
:

NR = 106
X-ray density, g/cm3: p = 3.33
R-factor: R = 0.0680MU, 1/cm: µ = 391.142
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 117.569
Theta-Interval for CPDP: T/I = 1-45