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Table 1 Half width of the absorption band ν 3 of studied compounds

From: Morphology and electronic structure of nanoscale powders of calcium hydroxyapatite

Temperature of the HAP samples annealing, T ,°C Half width of the absorption band at 1,040 cm 1 , characterizing PO 4 3 tetrahedra
200 130
500 116
700 120
900 193
1,000 >272