Transmission range (μm): 0.15~12.5
Transmittance: >90% (0.35~9μm, 3mm)
Refractive index (2.58μm): 1.5626
Expansion coefficient (℃-1): 18.1*10-6/℃ (-100℃, +120℃)
Gram's hardness (kg/mm2): 82 with 500g Indenter
Coefficient of elasticity: C11=90.4; C12=40.6; C44=25.3
Young's modulus (Gpa): 56.4 Gpa
Poisson's ratio: 0.343
Solubility (g/100gH2O-20℃): 0.17g/100g@23℃
Solubility surface: (111)
Density (g/cm3): 4.89 g/cm3
Melting point (℃): 1386℃
Barium fluoride (BaF2) crystals have good optical transmittance properties, with good light transmission in the wavelength range of 0.15μm~12.5μm. It has good moisture resistance, melting point of 1280℃, high use temperature, refractive index does not change much in a wide range of wavelengths, and has good optical and mechanical properties. Barium fluoride crystal is an ideal material for making optical components such as U-V and IR optical windows, prisms and lenses. With high infrared transmittance and wide spectral range, barium fluoride is also widely used in infrared detection, cell culture, infrared analysis, etc.