Barium Fluoride Crystal Description
Barium fluoride crystal provides transparency in the ultraviolet (UV) spectral region and is used as a material for UV optics and windows. It offers a transmission range from 150 nm to 12 µm and is suitable for applications such as spectroscopy, semiconductor lithography and other UV-sensitive processes.
Barium fluoride also possesses mechanical and thermal properties. It has a melting point near 1360 °C, a low thermal expansion and high hardness. Because of these properties, the barium fluoride crystal may be employed in demanding environments and at high temperatures, for instance in nuclear applications and as scintillation detectors in particle physics experiments.
Additionally, the barium fluoride crystal exhibits a low refractive index and reduced dispersion relative to other transparent materials. This facilitates the manufacture of lenses and prisms with reduced distortion and chromatic aberration.
Barium Fluoride Crystal Specification
Synonyms: Bariumdifluorid, Barium(II)-fluorid, Molecular Weight (M.W.): 175.32
| Item No. |
Description |
Form |
Lot Size |
US$ |
| C-BaF2 |
Barium Fluoride Crystal |
Rod, blank, window or custom windows, lens, prism |
50, 200, 1 000 pieces |
Enquire for a quote |
| Crystal Type |
Cubic, CaF2 type structure |
| Transmission Range |
0.15–15 µm |
| Refractive Index |
n0 = 1.6654, ne = 1.4898 at 509 nm |
| Density |
4.89 g/cm3 |
| Melting Point |
1280, 1335 °C |
| Molecular Weight |
175.3368 |
| Thermal Conductivity |
11.72 W/(m·K) @ 13 °C |
| Specific Heat |
410 J/(kg·K) @ 27 °C |
| Thermal Expansion |
18.1 x 10-6/K @ -110–120 °C |
| Hardness (Knoop) |
82 (Indenter load: 500 g) |
| Schermodul |
25.4 GPa |
| Schermodul |
268.89 GPa |
| Bruchmodul |
26.2 MPa |
| Dielectric Constant |
7.33 @ f = 2 MHz |
| Water Solubility |
0.17 g/100 g @ 23 °C |
| Crystal Structure |
Single crystal, synthetic |
| Cleavage Planes |
(111) |
Barium Fluoride Crystal Applications
1. X-ray and Gamma-ray Detection: Barium fluoride (BaF2) is used as a scintillation material in detectors for X-ray and gamma radiation. It converts high-energy radiation into visible light and permits the measurement of ionising radiation.
2. Ultraviolet (UV) Optics: Barium fluoride crystals are transparent over a broad range of wavelengths, including the UV region. They are employed in optical UV components such as windows, lenses and prisms for applications in spectroscopy, lithography and UV laser systems.
3. Infrared (IR) Optics: BaF2 shows transmission in the infrared range, particularly in the mid-infrared region. It is used for IR windows and lenses in thermal imaging, infrared spectroscopy and IR laser systems.
4. Scintillation Detectors: BaF2 crystals are utilised in experiments within particle and high-energy physics as scintillation detectors. They measure the energy of charged particles and photons, thereby facilitating the study of nuclear reactions and particle interactions.
5. Fluoride Ion Lasers: Barium fluoride crystals may be employed as the active medium in fluoride ion lasers. When excited with an appropriate light source, these lasers emit coherent light in the deep ultraviolet spectrum. They are used in scientific research, microlithography and photolithography.
6. Optical Coatings: BaF2 crystals are used as optical coatings due to their low refractive index. They improve the antireflection properties of optical components, reduce light scattering and enhance the transmittance of optical systems.
7. High-Pressure Research: BaF2 crystals are applied in high-pressure experiments to produce extreme conditions. They serve as windows in diamond anvil cells, thereby enabling the generation of pressures exceeding one million atmospheres.
Converters & Calculators
