Card No: 454       Created: 24/11/1993    Last edition: 13/01/2009

Name: BENSTONITE
Specification: [1], structure type - dolomite, DF
Formula: Ba6Ca6Mg[CO3]13
Symmetry Class: trigonal
Space Group: R 3(-)
Unit Cell
Parameters:
a = 18.2800 | c = 8.6520
Number of Formula Unit: Z = 3Unit Cell Volume, Å3: Vc = 2503.80
Number of Atomic Position
per full Unit Cell
:
P/U = 207 Molar Volume, cm3/mol: Vm = 502.71
Number of Reflexes used in
Structure Determination
:

NR = 964
X-ray density, g/cm3: p = 3.72
R-factor: R = 0.0620MU, 1/cm: µ = 635.922
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 171.073
Theta-Interval for CPDP: T/I = 1-45