Hydrothermal growth of carbonate-containing hydroxyapatite single crystals

Crystal Structure of Calcium-Deficient Carbonated Hydroxyapatite. Thermal Decomposition

“…The only successful attempt to obtain large single crystals of carbonated apatite was reported in (2). The hydrothermally grown needle crystals of 3}12 mm in length had extremely low CO content (from 0.09 to 0.65 wt%).…”

Thermal stability of a modified sol-gel derived hydroxyapatite nanopowders

“…is assigned to triply degenerated (v 3 ) asymmetric stretching mode of P-O bond in hydroxyapatite structure. The characteristic doublet IR peaks around 1430 and 1471 cm −1 can be attributed to the vibrational frequencies of carbonate ions substituted at the phosphate site in apatite, so called B-type apatite [26,27]. The band located at 559 cm −1 [28,29] belong to triply degenerate ν 4 , O-P-O bending mode in the phosphate group.…”

Calcium Carbonate Polymorphs Growing in the Presence of Sericin: A New Composite Mimicking the Hierarchic Structure of Nacre

“…Silk sericin cast gel (CG) was obtained following the procedure suggested by Teramoto and coworkers [28]: a solution 1% w/w of silk sericin was spread on a PP plate (2 mL/cm 2 ) and dried at 25 • C overnight. After drying, the gel was covered by a thin layer of calcium carbonate saturated solution.…”