Card No: 298       Created: 08/05/1990    Last edition: 02/04/2012

Name: ARAGONITE
Specification: [1], structure type - aragonite
Formula: CaCO3
Symmetry Class: orthorhombic
Space Group: P mcn
Unit Cell
Parameters:
a = 4.9611 | b = 7.9672 | c = 5.7404
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 226.90
Number of Atomic Position
per full Unit Cell
:
P/U = 20 Molar Volume, cm3/mol: Vm = 34.17
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 2.93
R-factor: R = 0.0210MU, 1/cm: µ = 207.784
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 70.939
Theta-Interval for CPDP: T/I = 1-45