Card No: 3122       Created: 20/11/1990    Last edition: 16/06/2026

Name: MANGANONEPTUNITE
Specification: [1], structure type - neptunite
Formula: KNa2Li(Mn,Fe)2Ti2O2[Si8O22]
Symmetry Class: monoclinic-beta
Space Group: C 2/c
Unit Cell
Parameters:
a = 16.4100 | b = 12.5500 | c = 10.0300 | beta = 115.5000
Number of Formula Unit: Z = 4Unit Cell Volume, Å3: Vc = 1864.41
Number of Atomic Position
per full Unit Cell
:
P/U = 160 Molar Volume, cm3/mol: Vm = 280.75
Number of Reflexes used in
Structure Determination
:

-
X-ray density, g/cm3: p = 3.23
R-factor: -MU, 1/cm: µ = 241.665
Wave Length for Calculated
Powder Diffraction Patterns
:
Co=1.78892Mass attenuation coefficient,
cm2/g
:
µ/p = 74.866
Theta-Interval for CPDP: T/I = 1-45