Card No: 3513       Created: 13/03/1991    Last edition: 24/04/2017

Name: PELLYITE
Specification: [1]
Formula: Ba2Ca(Fe,Mg)2Si6O17
Symmetry Class: orthorhombic
Space Group: C mcm
Unit Cell
Parameters:
a = 15.6770 | b = 7.1500 | c = 14.2090
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 1592.69
Number of Atomic Position
per full Unit Cell
:
P/U = 112 Molar Volume, cm3/mol: Vm = 239.83
Number of Reflexes used in
Structure Determination
:

NR = 648
X-ray density, g/cm3: p = 3.58
R-factor: R = 0.0320MU, 1/cm: µ = 586.833
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 163.766
Theta-Interval for CPDP: T/I = 1-45