Card No: 3747       Created: 19/01/1995    Last edition: 13/01/2009

Name: POTASSICRICHTERITE
Specification: [2], syn, Sr(0)
Formula: K(NaCa)Mg5Si8O22(OH)2
Symmetry Class: monoclinic-beta
Space Group: C 2/m
Unit Cell
Parameters:
a = 10.0547 | b = 17.9970 | c = 5.2746 | beta = 104.8320
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 922.66
Number of Atomic Position
per full Unit Cell
:
P/U = 82 Molar Volume, cm3/mol: Vm = 277.88
Number of Reflexes used in
Structure Determination
:

NR = 526
X-ray density, g/cm3: p = 3.00
R-factor: R = 0.0900MU, 1/cm: µ = 127.734
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 42.648
Theta-Interval for CPDP: T/I = 1-45