Abstract

The paper presents the results of studying the composition and phase transitions occurring at thermal treatment of tusk of Mammuthus primigenius by the thermogravimetric and X-ray analysis methods. The elemental analysis of the tusk sample shows that, in addition to elements standard for hydroxyapatite, magnesium ions are present, that is, hydroxyapatite in the studied samples is represented in the magnesium-substituted form Ca_{10 – x}Mg_x(PO₄)₆(OH)₂. It is revealed that thermal decomposition of mammoth tusk components proceeds in a wide temperature range accompanied by transformation of the mineral part from hydroxyapatite to whitlockite. It is established that this process is caused by the presence of magnesium ions.

中文翻译：

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用热重法和X射线分析法分析原始猛犸象牙的成分和结构

摘要

本文介绍了通过热重分析和 X 射线分析方法研究原始猛犸象牙在热处理过程中发生的成分和相变的结果。象牙样品的元素分析表明，除了羟基磷灰石的标准元素外，还存在镁离子，即研究样品中的羟基磷灰石以镁取代形式 Ca _{10 – x} Mg _x (PO ₄ ) _{6 表示}(哦) ₂. 结果表明，猛犸象牙成分的热分解在很宽的温度范围内进行，伴随着矿物部分从羟基磷灰石向白云石的转变。已确定该过程是由镁离子的存在引起的。