Table 23.4 Mean crystallite size, crystallinity, and lattice parameters of as-synthesized hydroxyapatite nanopowders from XRD patterns

Nanopowders

HA

ZnHA

MgHA

EuHA

FHA

SiHA

KSiHA

ZnFHA

SrFHA

MgSrHA

MgSrFHA

Mean crystallite size,

nm

34

29

17

12.3

a-axis 11, c-

axis 22

23.67

25.53

32

19.5

33

27

Crystallinity

Amor*

0.11

Amor*

0.195

0.11

0.038

0.12

Amor*

Amor*

Amor*

Amor*

Lattice parameter

(Å)

aÅ

9.411

9.451

9.390

9.349

9.410

9.398

9.355

9.551

9.411

9.624

9.330

cÅ

6.878

6.895

6.860

6.987

6.894

6.842

6.846

6.899

6.894

6.983

6.977

Amor* amorphous

436

S. Kapoor et al.