Card No: 12281       Created: 18/02/25    Last edition: 02/04/2026

Name: TANTALITE-(Fe)
Specification: [1], structure type - columbite-tantalite
Formula: (Fe,Mn)(Ta,Nb)2O6
Symmetry Class: orthorhombic
Space Group: P bcn
Unit Cell
Parameters:
a = 14.2400 | b = 5.7300 | c = 5.0800
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 414.50
Number of Atomic Position
per full Unit Cell
:
P/U = 36 Molar Volume, cm3/mol: Vm = 62.42
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 6.97
R-factor: -MU, 1/cm: µ = 1157.582
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 166.135
Theta-Interval for CPDP: T/I = 1-45