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Study on Infrared Spectra and Infrared Radiation Characteristics of Tourmaline

LI Wen-wen1, WU Rui-hua1, DONG-Ying2   

  1. 1. China University of Geosciences, Beijing 100083, China; 2. Beijing Financial School, Beijing 100006, China
  • Received:2008-09-20 Revised:2008-09-20 Online:2008-09-20 Published:2008-09-20

Abstract: This paper studies the infrared spectra (IS) characteristics of different tourmaline species, and the infrared radiation (IR) characteristics after heat treatment on tourmaline species at different temperatures. The results show that the high IR ratio of tourmaline is due to the infrared activity of vibration in its crystal structure. The IR ratio of Fe tourmaline is close to that of Mg tourmaline, and both are higher than that of Li tourmaline. The IR ratio of tourmaline has some relationship with heat treatment temperature: with increasing heat treatment temperature, the IR ratio decreases. When heated to 800℃, the IR ratio reaches a maximum; while heated to higher than 900℃, tourmaline begins to decompose and its infrared radiation ratio drops down. At the room temperature, the largest monochromatic radiation wavelength of tourmaline is between 9μm and 10μm, which matches the wavelength (9.72μm) of the absolute blackbody very well. It demonstrates that tourmaline is a good material for infrared absorption and radiation.