Dataset Information

Syntheses, crystal structures, and comparisons of rare-earth oxyapatites Ca₂ RE ₈(SiO₄)₆O₂ (RE = La, Nd, Sm, Eu, or Yb) and NaLa₉(SiO₄)₆O₂.

ABSTRACT: Six different rare-earth oxyapatites, including Ca₂ RE ₈(SiO₄)₆O₂ (RE = La, Nd, Sm, Eu, or Yb) and NaLa₉(SiO₄)₆O₂, were synthesized using solution-based processes followed by cold pressing and sinter-ing. The crystal structures of the synthesized oxyapatites were determined from powder X-ray diffraction (P-XRD) and their chemistries verified with electron probe microanalysis (EPMA). All the oxyapatites were isostructural within the hexa-gonal space group P6₃/m and showed similar unit-cell parameters. The isolated [SiO₄]^4- tetra-hedra in each crystal are linked by the cations at the 4f and 6h sites occupied by RE ³⁺ and Ca²⁺ in Ca₂ RE ₈(SiO₄)₆O₂ or La³⁺ and Na⁺ in NaLa₉(SiO₄)₆O₂. The lattice parameters, cell volumes, and densities of the synthesized oxyapatites fit well to the trendlines calculated from literature values.

SUBMITTER: Crum JV

PROVIDER: S-EPMC6659328 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Syntheses, crystal structures, and comparisons of rare-earth oxyapatites Ca2 RE 8(SiO4)6O2 (RE = La, Nd, Sm, Eu, or Yb) and NaLa9(SiO4)6O2.

Crum Jarrod V JV Chong Saehwa S Peterson Jacob A JA Riley Brian J BJ

Acta crystallographica. Section E, Crystallographic communications 20190621 Pt 7

Six different rare-earth oxyapatites, including Ca2 RE 8(SiO4)6O2 (RE = La, Nd, Sm, Eu, or Yb) and NaLa9(SiO4)6O2, were synthesized using solution-based processes followed by cold pressing and sinter-ing. The crystal structures of the synthesized oxyapatites were determined from powder X-ray diffraction (P-XRD) and their chemistries verified with electron probe microanalysis (EPMA). A ...[more]

PMID: 31392017

Similar Datasets

Project description:Biomedical implants and devices for tissue engineering in clinics, mainly made of polymers and stiff metallic materials, require possibly secondary surgery or life-long medicine. Biodegradable metals for biomedical implants and devices exhibit huge potential to improve the prognosis of patients. In this work, we developed a new type of biodegradable binary zinc (Zn) alloys with 16 rare earth elements (REEs) including Sc, Y, La to Nd, and Sm to Lu, respectively. The effects of REEs on the alloy microstructure, mechanical properties, corrosion behavior and in vitro and in vivo biocompatibility of Zn were systematically investigated using pure Zn as control. All Zn-RE alloys generally exhibited improved mechanical properties, and biocompatibilities compared to pure Zn, especially the tensile strength and ductility of Zn-RE alloys were dramatically enhanced. Among the Zn-RE alloys, different REEs presented enhancement effects at varied extent. Y, Ho and Lu were the three elements displaying greatest improvements in majority of alloys properties, while Eu, Gd and Dy exhibited least improvement. Furthermore, the Zn-RE alloys were comparable with other Zn alloys and also exhibited superior properties to Mg-RE alloys. The in vivo experiment using Zn–La, Zn–Ce, and Zn–Nd alloys as tibia bone implants in rabbit demonstrated the excellent tissue biocompatibility and much more obvious osseointegration than the pure Zn control group. This work presented the significant potential of the developed Zn-RE binary alloys as novel degradable metal for biomedical implants and devices. Graphical abstract (a) Material preparation and characterizations. (b) Mechanical Properties and (c) Bone-implant interfaces.Image 1 Highlights • Novel binary Zn alloys with 16 rare earth elements including Sc, Y, La–Nd, Sm–Lu were firstly developed.• The alloying of rare earth element increased the tensile strength and elongation rate of pure Zn.• The Y, Ho, and Lu were the three elements that signficantly improved most of properties of Zn.• The binary Zn-RE alloys display superior property enhancement from rare earth element compared to Mg-RE alloys.• The in vivo implantation of the Zn–La, Zn–Ce, and Zn–Nd alloys exhibited much more obvious osseointegration than the pure Zn.

Dataset Information

Syntheses, crystal structures, and comparisons of rare-earth oxyapatites Ca₂ RE ₈(SiO₄)₆O₂ (RE = La, Nd, Sm, Eu, or Yb) and NaLa₉(SiO₄)₆O₂.

Publications

Syntheses, crystal structures, and comparisons of rare-earth oxyapatites Ca<sub>2</sub> <i>RE</i> <sub>8</sub>(SiO<sub>4</sub>)<sub>6</sub>O<sub>2</sub> (<i>RE</i> = La, Nd, Sm, Eu, or Yb) and NaLa<sub>9</sub>(SiO<sub>4</sub>)<sub>6</sub>O<sub>2</sub>.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets