【摘要】 颜色是软玉价值的重要体现,青海软玉颜色丰富,而致色方面的研究较为滞后。近年来青海软玉致色研究多为翠青玉和烟青玉,认为Cr³⁺和Mn²⁺分别为翠青玉和烟青玉致色元素。青海软玉的颜色非单一色彩,如青白色、翠绿色、灰紫色等,因此青海软玉致色应包含多种致色元素。本文在前人研究的基础上,利用X射线荧光光谱法（XRF）、化学滴定法、电感耦合等离子体质谱法（ICP-MS）和电子顺磁共振能谱（EPR）测试数据,根据分析数据与色调变化之间的关系揭示了8种颜色青海软玉的致色元素。结果表明:白玉致色元素为Fe³⁺;青白玉和碧玉致色元素为Fe²⁺和Fe³⁺;青玉致色元素为Fe²⁺、Fe³⁺和高价态的Mn;翠青玉致色元素为Fe²⁺、Fe³⁺、Cr³⁺;黄玉和糖玉致色元素为Fe³⁺和高价态的Mn;烟青玉致色元素为Fe³⁺和Ti⁴⁺。研究认为青海软玉中绿色调与Fe²⁺有关,黄色调与Fe³⁺和高价态的Mn有关,而蓝紫色调与Fe³⁺和Ti⁴⁺有关。本研究基本确定了不同颜色青海软玉的致色元素,为青海软玉致色机制的研究提供了理论依据。更多还原

【Abstract】 BACKGROUND: Color is the important manifestation of nephrite value. Qinghai nephrite has different colors, but there is a lack of research on coloration. In recent years, the study on the coloration of nephrite in Qinghai mainly focused on azure-green and blue-violet, and it was considered that Cr³⁺ and Mn²⁺ were respective coloration elements of azure-green and blue-violet. The color of Qinghai nephrite is not a simple color, such as white-green, azure-green, and blue-violet. Therefore, Qinghai nephrite should contain a variety of color-causing elements.OBJECTIVES: To reveal the color-causing elements of eight colors of nephrite from Qinghai based on the relationship between analysis data and hue changes.METHODS: X-ray Fluorescence Spectrometry（XRF）, Chemical Titration, Inductively Coupled Plasma-Mass Spectrometry（ICP-MS） and Electron Paramagnetic Resonance Spectroscopy（EPR） were used to study the color-causing elements of nephrite.RESULTS: The color-causing element of white Qinghai nephrite was Fe³⁺. The color-causing elements of white-green and azure-green Qinghai nephrite were Fe²⁺ and Fe³⁺, respectively. The chromogenic elements of green Qinghai nephrite were Fe²⁺, Fe³⁺ and Mn in high valence. The color-causing elements of azure-green Qinghai nephrite were Fe²⁺, Fe³⁺ and Cr³⁺. The chromogenic elements of yellow and brown Qinghai nephrite were Fe³⁺ and high-valence Mn. Fe³⁺ and Ti⁴⁺ were the color-causing elements of blue-purple Qinghai nephrite.CONCLUSIONS: This study determined the color-causing elements of different colors of Qinghai nephrite, which provided a theoretical basis for the study of the coloration mechanism of Qinghai nephrite.更多还原