Representative FT-IR spectra for bone-like mineral (BLM), sintered disks from 5.6% carbonated apatite powder (CA5), sintered disks from 10.5% carbonated apatite powder (CA10), and sintered disks from hydroxyapatite powder (HA) substrates. Phosphate peaks are found for all samples at 1032, 602, and 574 cm−1 and carbonate peaks are found at 875 or 1455 cm−1 for all samples except HA.