Card No: 12055       Created: 19/03/24    Last edition: 29/03/2026

Name: OXYBISMUTOMICROLITE
Specification: [1], structure type - pyrochlore
Formula: (Bi,Na,Ca)2(Ta,Ti,Nb)2O6(O,F)
Symmetry Class: cubic
Space Group: *F d3m
Unit Cell
Parameters:
a = 10.4746
Number of Formula Unit: Z = 8Unit Cell Volume, Å3: Vc = 1149.24
Number of Atomic Position
per full Unit Cell
:
P/U = 88 Molar Volume, cm3/mol: Vm = 86.53
Number of Reflexes used in
Structure Determination
:

NR = 104
X-ray density, g/cm3: p = 7.03
R-factor: R = 0.0190MU, 1/cm: µ = 1097.142
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 156.156
Theta-Interval for CPDP: T/I = 1-45