Research Article

Hydrothermal Preparation and Characterization of Ultralong Strontium-Substituted Hydroxyapatite Whiskers Using Acetamide as Homogeneous Precipitation Reagent

Table 1

Lattice constants, 2 value for (3 0 0) diffraction, chemical composition, and size of the synthetic HAp and Sr-substituted HAp whiskers.

SamplesLattice constants 2 (°) for (3 0 0) reflectionChemical compositionSize of the whiskers
a (Å)c (Å)Ca replacement by Sr (mol.%)(Ca + Sr)/P moler ratioLength ( m)Diameter ( m)

HAp9.4236.91532.90001.62
Sr2.5HAp9.4396.88332.8411.371.65
Sr5HAp9.4456.91232.8212.721.63
Sr10HAp9.4516.96432.8005.831.61