Card No: 3874       Created: 20/05/1988    Last edition: 13/01/2009

Name: PYROPHYLLITE
Specification: [1], 1TC
Formula: Al[Si2O5](OH)
Symmetry Class: triclinic
Space Group: C 1(-)
Unit Cell
Parameters:
a = 5.1600 | b = 8.9660 | c = 9.3400 | alpha = 91.1800 | beta = 100.4600 | gamma = 89.6400
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 424.84
Number of Atomic Position
per full Unit Cell
:
P/U = 36 Molar Volume, cm3/mol: Vm = 63.97
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 2.80
R-factor: R = 0.0600MU, 1/cm: µ = 90.951
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 32.483
Theta-Interval for CPDP: T/I = 1-45