AlF3-based fluoride glasses were developed. The glass systems AlF3-YF3-RF2, AlF3-YF3-ZrF4- RF2 (RF2-alkali earth fluoride) have been studied in detail. The relationship between physical properties and chemical composition have been established. The structure of AlF3- based fluoride glasses were studied by Raman and infrared spectroscopy and new structural model has been proposed.
"AlF3-Based Fluoride Glasses For Infrared Optical Window And Fiber Materials", Proc. SPIE 0683, Infrared and Optical Transmitting Materials, (19 December 1986); doi: 10.1117/12.936412; https://doi.org/10.1117/12.936412