Card No: 28       Created: 16/07/1990    Last edition: 01/08/2012

Name: AENIGMATITE
Specification: [2], structure type - aenigmatite
Formula: Na2Fe5TiSi6O20
Symmetry Class: triclinic
Space Group: P 1(-)
Unit Cell
Parameters:
a = 10.4060 | b = 10.8130 | c = 8.9260 | alpha = 104.9300 | beta = 96.8700 | gamma = 125.3200
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 744.46
Number of Atomic Position
per full Unit Cell
:
P/U = 68 Molar Volume, cm3/mol: Vm = 224.21
Number of Reflexes used in
Structure Determination
:

NR = 1518
X-ray density, g/cm3: p = 3.87
R-factor: R = 0.0920MU, 1/cm: µ = 242.240
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 62.577
Theta-Interval for CPDP: T/I = 1-45