Texture analysis from synchrotron images with the Rietveld method: dinosaur tendon and salmon scale

A Rietveld method is described which extracts information on crystal structure, texture and microstructure directly from two-dimensional synchrotron diffraction images. This is advantageous over conventional texture analysis that relies on individual diffraction peaks, particularly for low-symmetry...

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Bibliographic Details
Published in:Journal of Synchrotron Radiation
Main Authors: Lonardelli, Ivan, H. Wenk, Lutterotti, Luca, M. Goodwin
Other Authors: H., Wenk, M., Goodwin
Format: Article in Journal/Newspaper
Language:English
Published: 2005
Subjects:
texture analysi
Rietveld method
biomineralization
dinosaur tendon
salmon scale
hydroxylapatite
Atlantic salmon
Online Access:http://hdl.handle.net/11572/72839
https://doi.org/10.1107/S090904950500138X
http://scripts.iucr.org/cgi-bin/paper?S090904950500138X
Description
Summary:A Rietveld method is described which extracts information on crystal structure, texture and microstructure directly from two-dimensional synchrotron diffraction images. This is advantageous over conventional texture analysis that relies on individual diffraction peaks, particularly for low-symmetry materials with many overlapping peaks and images with a poor peak-to-background ratio. The method is applied to two mineralized biological samples with hydroxylapatite fabrics: an ossified pachycephalosaurid dinosaur tendon and an Atlantic salmon scale. Both are measured using monochromatic synchrotron X-rays. The dinosaur tendon has very strongly oriented crystals with c-axes parallel to the tendon direction. The salmon scale displays a weak texture.

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