Journal
JOURNAL OF SYNCHROTRON RADIATION
Volume 12, Issue -, Pages 354-360Publisher
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S090904950500138X
Keywords
texture analysis; Rietveld method; biomineralization; dinosaur tendon; salmon scale; hydroxylapatite
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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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