Card No: 3351       Created: 08/02/2002    Last edition: 23/05/2016

Name: ORTHOCLASE
Specification: [4], at 121oK
Formula: K[AlSi3O8]
Symmetry Class: monoclinic-beta
Space Group: C 2/m
Unit Cell
Parameters:
a = 8.5740 | b = 13.0060 | c = 7.1910 | beta = 116.0700
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 720.31
Number of Atomic Position
per full Unit Cell
:
P/U = 52 Molar Volume, cm3/mol: Vm = 108.47
Number of Reflexes used in
Structure Determination
:

NR = 940
X-ray density, g/cm3: p = 2.55
R-factor: R = 0.0440MU, 1/cm: µ = 121.482
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 47.710
Theta-Interval for CPDP: T/I = 1-45