Crystal structure of sr-substituted hydroxyapatite synthesized by hydrothermal method

Masanori Kikuchi; Atsushi Yamazaki; Ryohei Otsuka; Masaru Akao; Hideki Aoki

doi:10.1006/jssc.1994.1383

Crystal structure of sr-substituted hydroxyapatite synthesized by hydrothermal method

Masanori Kikuchi^*, Atsushi Yamazaki, Ryohei Otsuka, Masaru Akao, Hideki Aoki

^*Corresponding author for this work

School of Creative Science and Engineering

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

Single crystals of Sr-substituted hydroxyapatite, (Ca_9.42Sr_0.18 H_0.8(PO₄)₆(OH)₂, up to 0.2 × 0.2 × 5 mm³ maximum size were grown hydrothermally from calcium hydrogenphosphate (CaHPO₄) and strontium hydrogenphosphate (SrHPO₄) in a long tube-type autoclave using a temperature gradient technique. The single crystals, containing 1.92 mole% Sr to (Ca + Sr) and having a (Ca + Sr)/P atomic ratio of 1.60, had a hexagonal-prismatic shape with density of 3.207 g/cm³. The crystal had a hexagonal system, space group P6₃/m with a = 9.3920(7) Å, c = 6.890(1) Å, and Z = 1. A hexagonal-prismatic crystal, 165 × 165 × 231 μ³ in size, was used for crystal structure refinement. The atomic parameters in P6₃/m were refined to R = 5.9% and RwÅ = 6.3% with 2018 independent reflections. The preferential substitution site of Sr for Ca was determined as the Ca(1) site.

Original language	English
Pages (from-to)	373-378
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	113
Issue number	2
DOIs	https://doi.org/10.1006/jssc.1994.1383
Publication status	Published - 1994 Dec

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1006/jssc.1994.1383

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title = "Crystal structure of sr-substituted hydroxyapatite synthesized by hydrothermal method",

abstract = "Single crystals of Sr-substituted hydroxyapatite, (Ca9.42Sr0.18 H0.8(PO4)6(OH)2, up to 0.2 × 0.2 × 5 mm3 maximum size were grown hydrothermally from calcium hydrogenphosphate (CaHPO4) and strontium hydrogenphosphate (SrHPO4) in a long tube-type autoclave using a temperature gradient technique. The single crystals, containing 1.92 mole% Sr to (Ca + Sr) and having a (Ca + Sr)/P atomic ratio of 1.60, had a hexagonal-prismatic shape with density of 3.207 g/cm3. The crystal had a hexagonal system, space group P63/m with a = 9.3920(7) {\AA}, c = 6.890(1) {\AA}, and Z = 1. A hexagonal-prismatic crystal, 165 × 165 × 231 μ3 in size, was used for crystal structure refinement. The atomic parameters in P63/m were refined to R = 5.9% and Rw{\AA} = 6.3% with 2018 independent reflections. The preferential substitution site of Sr for Ca was determined as the Ca(1) site.",

author = "Masanori Kikuchi and Atsushi Yamazaki and Ryohei Otsuka and Masaru Akao and Hideki Aoki",

year = "1994",

month = dec,

doi = "10.1006/jssc.1994.1383",

language = "English",

volume = "113",

pages = "373--378",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

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T1 - Crystal structure of sr-substituted hydroxyapatite synthesized by hydrothermal method

AU - Kikuchi, Masanori

AU - Yamazaki, Atsushi

AU - Otsuka, Ryohei

AU - Akao, Masaru

AU - Aoki, Hideki

PY - 1994/12

Y1 - 1994/12

N2 - Single crystals of Sr-substituted hydroxyapatite, (Ca9.42Sr0.18 H0.8(PO4)6(OH)2, up to 0.2 × 0.2 × 5 mm3 maximum size were grown hydrothermally from calcium hydrogenphosphate (CaHPO4) and strontium hydrogenphosphate (SrHPO4) in a long tube-type autoclave using a temperature gradient technique. The single crystals, containing 1.92 mole% Sr to (Ca + Sr) and having a (Ca + Sr)/P atomic ratio of 1.60, had a hexagonal-prismatic shape with density of 3.207 g/cm3. The crystal had a hexagonal system, space group P63/m with a = 9.3920(7) Å, c = 6.890(1) Å, and Z = 1. A hexagonal-prismatic crystal, 165 × 165 × 231 μ3 in size, was used for crystal structure refinement. The atomic parameters in P63/m were refined to R = 5.9% and RwÅ = 6.3% with 2018 independent reflections. The preferential substitution site of Sr for Ca was determined as the Ca(1) site.

AB - Single crystals of Sr-substituted hydroxyapatite, (Ca9.42Sr0.18 H0.8(PO4)6(OH)2, up to 0.2 × 0.2 × 5 mm3 maximum size were grown hydrothermally from calcium hydrogenphosphate (CaHPO4) and strontium hydrogenphosphate (SrHPO4) in a long tube-type autoclave using a temperature gradient technique. The single crystals, containing 1.92 mole% Sr to (Ca + Sr) and having a (Ca + Sr)/P atomic ratio of 1.60, had a hexagonal-prismatic shape with density of 3.207 g/cm3. The crystal had a hexagonal system, space group P63/m with a = 9.3920(7) Å, c = 6.890(1) Å, and Z = 1. A hexagonal-prismatic crystal, 165 × 165 × 231 μ3 in size, was used for crystal structure refinement. The atomic parameters in P63/m were refined to R = 5.9% and RwÅ = 6.3% with 2018 independent reflections. The preferential substitution site of Sr for Ca was determined as the Ca(1) site.

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DO - 10.1006/jssc.1994.1383

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Crystal structure of sr-substituted hydroxyapatite synthesized by hydrothermal method

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