Changchun Yutai Optics Co., Ltd. Polycrystalline CaF2 Windows

How to clean CaF2 windows? DO NOT USE ULTRASONIC CLEANING FOR CALCIUM FLUORIDE VIEWPORTS. Always start by blowing off window first with clean, dry compressed air. ... Always use a solvent-dampened swab to wipe clean a window, a dry swab can potentially scratch a window and. ... Excess solvent should be flung off by a flip of the wrist. What type of crystal structure is CaF2? CaF₂ is Fluorite structured and crystallizes in the cubic Fm̅3m space group. Ca²⁺ is bonded in a body-centered cubic geometry to eight equivalent F¹⁻ atoms. All Ca-F bond lengths are 2.39 Å. F¹⁻ is bonded to four equivalent Ca²⁺ atoms to form a mixture of edge and corner-sharing FCa₄ tetrahedra.