Card No: 11827       Created: 27/04/23    Last edition: 27/03/2026

Name: APATITE
Specification: [41], structure type - apatite, syn, DF
Formula: (Ca,Na)5[PO4]3Cl0.78
Symmetry Class: hexagonal
Space Group: P 6(3)/m
Unit Cell
Parameters:
a = 9.5773 | c = 6.8033
Number of Formula Unit: Z = 2Unit Cell Volume, Å3: Vc = 540.43
Number of Atomic Position
per full Unit Cell
:
P/U = 56 Molar Volume, cm3/mol: Vm = 162.76
Number of Reflexes used in
Structure Determination
:

NR = 1020
X-ray density, g/cm3: p = 3.13
R-factor: R = 0.0269MU, 1/cm: µ = 265.472
Wave Length for Calculated
Powder Diffraction Patterns
:
Cu=1.54056Mass attenuation coefficient,
cm2/g
:
µ/p = 84.864
Theta-Interval for CPDP: T/I = 1-45