【摘要】 2024年，广西梧州人工宝石市场出现了一种被称为“重锆”的人工合成立方氧化锆新品种。这种新的合成材料目前尚无详细报道，其成分及结构特征亦不为业界所知。本文利用电子探针、X射线衍射、红外光谱、拉曼光谱等方法对收集到的重锆样品进行了系统的宝石学和矿物学特征研究。结果表明，重锆的相对密度约为7.40,主要化学成分为Yb₂O₃和ZrO₂,Yb₂O₃含量约51.08%～53.06%,可含少量的Y₂O₃。相对原子质量更大的重稀土元素Yb的掺入导致重锆的密度偏高。重锆为等轴晶系，萤石型结构，空间群Fm3m,晶胞参数a=5.134 8（18）?,晶胞体积为135.39（8）?³,依据本次测试数据计算的化学式为Zr_0.57Yb_0.40Y_0.03O_1.78□_0.22或Zr_0.59Yb_0.41O_1.79□_{0.21□氧空位}。本文建议重锆的宝石学名称为“合成富镱立方氧化锆”。更多还原

【Abstract】 In 2024, a previously undocumented synthetic cubic zirconia product, traded as “heavy-zircon”, emerged in the Wuzhou gem market（Guangxi, China）. To address the lack of peer-reviewed data on its composition and identity, we performed a comprehensive mineralogical and gemological study using electron-probe microanalysis（EPMA）, X-ray diffraction（XRD）, fourier-transform infrared（FTIR）, and micro-Raman spectroscopy. The material has a high relative density of approximately 7.40 and is primarily composed of Yb₂O₃（51.08%～53.06%） and ZrO₂, with minor Y₂O₃. Its elevated density results from the incorporation of ytterbium（Yb）, a heavy rare earth element. Single-crystal XRD confirms an isometric fluorite-type structure（space group Fm3m） with a lattice parameter a=5.134 8（18） ? and a unit-cell volume V=135.39（8） ?³. The calculated chemical formulas are Zr_0.57Yb_0.40Y_0.03O_1.78□_0.22 or Zr_0.59Yb_0.41O_1.79□_0.21（□ denotes oxygen vacancy）. These results identify heavy-zircon as a high-density, ytterbium-rich variant of yttria-stabilized cubic zirconia. In accordance with gemological nomenclature, we propose “synthetic ytterbium-rich cubic zirconia” as its formal species name.更多还原