Table 1: IR wavenumber position (cm−1) of , , , and bands of Eu:HAp spectrum from second derivative.

AssignmentsPosition (cm−1)References

962[62]
475[62]
1033; 1045; 1073; 1090[62]
569; 575; 588; 602[62]
Present in newly precipitated apatite1111[62, 74]
-containing apatites1144[74]
group (librational mode)633[74, 75]