Figure 6
From: Early Evidence for Northern Salmonid Fisheries Discovered using Novel Mineral Proxies
Powder x-ray diffractograms demonstrating the formation of crystalline hydroxylapatite in experimentally burned and hydrated Atlantic salmonid vertebrae. Rietveld refined diffractograms for modern salmonid vertebrae incinerated at 600 °C (A) and 800 °C (B) then hydrated with distilled water are displayed. Hydroxylapatite and beta magnesium tricalcium phosphate phases are represented in black and red respectively. The upper diffractograms show the starting points of the experiments, while the lower ones are the experiment results after four 50 µl hydration treatments. Percentages of each mineral phase and crystallinity indices for hydroxylapatite are listed. Key reflectance peaks are labelled with their Miller Indices and 2⊖ diffraction angles. Note that HAp crystallinity is considerably higher in hydrated bone initially burned at 800 °C. Abbreviations: HAp = hydroxylapatite; TCP = beta magnesium tricalcium phosphate; H2O = water.
