Heat-Treatment Experiments and Color Mechanism of Zircon from Changle, Shandong Province

详细信息   

• 责任者：Liu Jinhua (School of Gemology ; China University of Geosciences ; Beijing 100083 ; China) ; Bai Feng
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2012
• 卷期：31(3)
• 关键词：锆石 ; zircon ; 山东 ; Shandong Province
• 页码：p.454-458
• 图表：2 illus., 8 refs.
• 分类号：0700
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

摘要

A series of heat-treatment experiments of zircons from Changle in Shandong Province were conducted at different temperatures in oxidizing and reducing atmosphere. The colors and their variations were studied by UV-NIR spectrometer. The formation mechanism of the zircon colors was discussed on the basis of the experiments. It is found that the color of the zircons after heat-treatment changed into colorless, yellow or orange in oxidizing atmosphere and colorless in reducing atmosphere. All the samples began to fade significantly at 400 ℃. The results also show that the red and redish brown colors of zircons are attributed to the color center and Fe^3＋ is responsible for the yellow coloration of zircons. Only a low temperature can make zircon change into perfect colorless.