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Crystallographic Characteristics of Inorganic Mineral in Mammoth Ivory and Ivory

Xueying Sun, Mingyue He, Jinlin Wu
2022 Minerals  

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In this paper, the chemical composition and crystalline properties of mammoth ivory and ivory were systematically analyzed. The results revealed that the microscopic crystalline hydroxyapatites are the major component of minerals in mammoth ivory and ivory. The Ca/P ratios of the samples studied are obviously lower than apatite. Refined cell parameters showed a similar value between mammoth ivory (a = 9.4148 Å and b = 6.8821 Å) and ivory (a = 9.4166 Å and c = 6.8841 Å). Individual crystal sizes
more » ... in mammoth ivory and ivory are estimated to be 20.41–23.16 and 18.92–21.50 nm, respectively. The calculated crystallinity of two kinds of ivory (mammoth ivory: 1.55; ivory: 1.4) is far lower than geological mineral fluorapatite due to the impact of tissue function and organic matrix.
doi:10.3390/min12020117 fatcat:vaayyf24tvginniwzuz7vj2gzi
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Xueying Sun, Mingyue He, Jinlin Wu. "Crystallographic Characteristics of Inorganic Mineral in Mammoth Ivory and Ivory." Minerals 12.2 (2022) 117