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Bone mineral change during experimental calcination: an X-ray diffraction study.

Sergio Galeano¹, Mari Luz García-Lorenzo

¹National Police Corps, Homicide Central Command, Avenida Mirador de La Reina 4, Madrid, Spain.

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|June 26, 2014

Summary

This summary is machine-generated.

Calcination of pig bones up to 650°C removes organic matter and carbonates, yielding white hydroxyapatite. Higher temperatures stabilize crystallinity and crystallite size, crucial for bone material characterization.

Keywords:

burned bones calcination crystallite size forensic science hydroxyapatite powder X-ray diffraction

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Area of Science:

Materials Science
Biomaterials Engineering
Biomineralization Studies

Background:

Pig bones are primarily composed of hydroxyapatite and organic collagen.
Understanding thermal decomposition is vital for biomaterial processing and characterization.
Calcination effects on bone structure and composition require detailed investigation.

Purpose of the Study:

To investigate the impact of calcination temperatures (400-1200°C) on pig bone properties.
To determine the optimal temperature for complete removal of organic components and carbonate substitutions.
To correlate thermal treatment with changes in hydroxyapatite crystallinity and morphology.

Main Methods:

Powder X-ray Diffraction (XRD) for phase identification and crystallinity analysis.
Gravimetric analysis for weight loss determination.
Visual inspection for color changes as indicators of organic matter removal.

Main Results:

Hydroxyapatite was confirmed as the crystalline phase across all tested temperatures.
Complete removal of organic components and carbonate substitutions occurred at 650°C, resulting in white bone samples.
Crystallinity and crystallite size increased up to 650°C and remained stable thereafter. Below 650°C, organic matter caused background noise and darker coloration.

Conclusions:

Calcination at 650°C effectively purifies pig bone into white hydroxyapatite.
Thermal treatment significantly influences bone's structural and crystalline properties.
Controlled calcination is key for tailoring bone-derived biomaterials for specific applications.