Table 2: Lattice parameters and their variations for single-phase FAp and FAp-ZnO composite nanopowders in comparison with the standard FAp (JCPDS#15–0876).

SampleLattice parameters
a-Axis (Å)c-Axis (Å)V3)Δa (Å)Δc (Å)ΔV3)

FAp9.3736.8841565.778+0.0050+1.514
FAp-ZnO9.3796.8861568.239+0.011+0.002+3.975
JCPDS9.3686.8841564.264