Effect of carbonate contents on crystal structure of a-type carbonate apatites

Toshiyuki Ikoma; Yosinori Kubo; Atsushi Yamazaki; Masaru Akao; Junzo Tanaka

Effect of carbonate contents on crystal structure of a-type carbonate apatites

Toshiyuki Ikoma, Yosinori Kubo, Atsushi Yamazaki, Masaru Akao, Junzo Tanaka

School of Creative Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

9 Citations (Scopus)

Abstract

A-type carbonate apatites with different CO₃ contents were obtained by heating hydroxyapatite powder in dry carbon dioxide atmosphere at 1173 K for 1 to 64 hours. The replacement of CO₃ ions lowered the crystal symmetry to hexagonal (P6₃/m) → hexagonal (P-6) → monoclinic (Pb) in that order. The a-axis parameters were linearly increased with the increase of CO₃ ions, while the b- and c-axis parameters were varied little. The lattice parameters of the A-type carbonate apatite completely replaced by CO₃ ions were refined to be a = 0.9572(1), b = 0.6877(1). The splitting of IR absorption bands attributed to a PO₄ ion also supported the lowering of crystal symmetries.

Original language	English
Pages (from-to)	191-194
Number of pages	4
Journal	Key Engineering Materials
Volume	192-195
Publication status	Published - 2001 Jan 1
Event	13th international Symposium on Ceramics in Medicine (BIOCERAMICS) - Bologna, Italy Duration: 2000 Nov 22 → 2000 Nov 26

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Effect of carbonate contents on crystal structure of a-type carbonate apatites",

abstract = "A-type carbonate apatites with different CO3 contents were obtained by heating hydroxyapatite powder in dry carbon dioxide atmosphere at 1173 K for 1 to 64 hours. The replacement of CO3 ions lowered the crystal symmetry to hexagonal (P63/m) → hexagonal (P-6) → monoclinic (Pb) in that order. The a-axis parameters were linearly increased with the increase of CO3 ions, while the b- and c-axis parameters were varied little. The lattice parameters of the A-type carbonate apatite completely replaced by CO3 ions were refined to be a = 0.9572(1), b = 0.6877(1). The splitting of IR absorption bands attributed to a PO4 ion also supported the lowering of crystal symmetries.",

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T1 - Effect of carbonate contents on crystal structure of a-type carbonate apatites

AU - Ikoma, Toshiyuki

AU - Kubo, Yosinori

AU - Yamazaki, Atsushi

AU - Akao, Masaru

AU - Tanaka, Junzo

PY - 2001/1/1

Y1 - 2001/1/1

N2 - A-type carbonate apatites with different CO3 contents were obtained by heating hydroxyapatite powder in dry carbon dioxide atmosphere at 1173 K for 1 to 64 hours. The replacement of CO3 ions lowered the crystal symmetry to hexagonal (P63/m) → hexagonal (P-6) → monoclinic (Pb) in that order. The a-axis parameters were linearly increased with the increase of CO3 ions, while the b- and c-axis parameters were varied little. The lattice parameters of the A-type carbonate apatite completely replaced by CO3 ions were refined to be a = 0.9572(1), b = 0.6877(1). The splitting of IR absorption bands attributed to a PO4 ion also supported the lowering of crystal symmetries.

AB - A-type carbonate apatites with different CO3 contents were obtained by heating hydroxyapatite powder in dry carbon dioxide atmosphere at 1173 K for 1 to 64 hours. The replacement of CO3 ions lowered the crystal symmetry to hexagonal (P63/m) → hexagonal (P-6) → monoclinic (Pb) in that order. The a-axis parameters were linearly increased with the increase of CO3 ions, while the b- and c-axis parameters were varied little. The lattice parameters of the A-type carbonate apatite completely replaced by CO3 ions were refined to be a = 0.9572(1), b = 0.6877(1). The splitting of IR absorption bands attributed to a PO4 ion also supported the lowering of crystal symmetries.

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T2 - 13th international Symposium on Ceramics in Medicine (BIOCERAMICS)

Y2 - 22 November 2000 through 26 November 2000

ER -

Effect of carbonate contents on crystal structure of a-type carbonate apatites

Abstract

ASJC Scopus subject areas

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