Crystal structure of human tooth enamel studied by neutron diffraction. (28th January 2015)

• Record Type: Journal Article
• Authors: Ouladdiaf, Bachir; Rodriguez-Carvajal, Juan; Goutaudier, Christelle; Ouladdiaf, Selma; Grosgogeat, Brigitte; Pradelle, Nelly; Colon, Pierre
• Is Part Of: Materials research express. Volume 2:Number 2(2015)
• Publication Date: 2015-01-28
• Subjects: human tooth enamel -- neutron powder diffraction -- hydroxyapatite; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/2/2/025401
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Crystal structure of human tooth enamel was investigated using high-resolution neutron powder diffraction. Excellent agreement between observed and refined patterns is obtained, using the hexagonal hydroxyapatite model for the tooth enamel, where a large hydroxyl deficiency ∼70% is found in the 4e site. Rietveld refinements method combined with the difference Fourier maps have revealed, however, that the hydroxyl ions are not only disordered along the c-axis but also within the basal plane. Additional H ions located at the 6h site and forming anions were found.