LiF Crystal or Lithium Fluoride Quality optical crystals Xrays and Bragg Difraction

Specifications 1).Material: LiF crystal

2). Transmittance: 110nm-7000nm

3). Application: UV and VUV

4). Purity: 99.9999%

5). Quality:AAAAAA

LiF CRYSTAL Lithium Flouride shows good optical properites. It can be used for windows, prisms and lenses in the vacuum UV,visibel and infrared where desired transmission is in the 0.11μm~7μm range. Because of its paricular lattice structure, LiF can also be used as X-ray diffraction devices.
We Can Offer (1).Various optics for IR & VUV application, using our LiF crystal materials (2).Optical element for X-ray diffraction devices (3).Good quality LiF crystal blank materials (4).OEM service
Capabilities  Maximum of Material Diameter: dia170mm  
These crystals are very pure and were grown for good transmission at UV wavelengths

There are several types available:
(1) Optically polished flat crystals, 1 cm thick, approximately square 170 x 170 mm2 planar face, with angled sides in one direction (see Photo 1);
(2) Same as item (1), but half-size, with the same thickness;
(3) Optically polished "sawtooth" crystals, of approximately the same size, having one of the square faces polished to have 20 ridges of 45 degrees (see Photo 2, and Fig. 3).

Items are available with different levels of surface qualities: All clean surfaces, or one surface with some epoxy.


Please let us know the quantity you are interested in and which type and we will provide a price quote
  Dimensions (typ.)
- Planar Crystals:  174.3 mm x 169.8 mm x 10.0 mm
                            [6.863 in x 6.686 in x 0.394 in]
- Half-Sized Planar:  174.3 mm x 84.9 mm x 10.0 mm
                               [6.863 in x 3.343 in x 0.394 in]
- Sawtooth Crystals:  174.8 mm x 169.8 mm x 12.1 mm
                                 [6.880 in x 6.686 in x 0.476 in]
Edges are right angles on two sides and have 6 degree bevel on the opposite two sides. 

Optical Transmission
Crystals as manufactured met or exceeded external transmission as given in this table.

Wavelength	Transmission
135 nm	> 66%
150 nm	> 77%
165 nm	> 85%

(All specifications typical.)       LiF Crystal Properties

Optical Properties
Transmission Range	105 nm to 6 μm
Transmittance	>90% at 300 nm to 4.5 μm
Refractive Index	1.3733at 2.5 μm; 1.6240 at 121 nm
Reflection Loss	4.4% at 4 μm (both surfaces)
Physical Properties
Density	2.64 g/cm3
Melting Point	845°C
Thermal Conductivity	11.3 Wm-1K-1 at 314K
Thermal Expansion	37 x 10-6 /°C
Mohs Hardness	113 with 600g indenter (kg/mm2)
Specific Heat Capacity	1562 J/(kg.k)
Dielectric Constant	9.0 at 100 Hz
Youngs Modulus (E)	64.79 GPa
Shear Modulus (G)	55.14 GPa
Bulk Modulus (K)	62.03 GPa
Rupture Modulus	10.8 MPa
Elastic Coefficient	C11=112; C12=45.6; C44=63.2
Chemical Properties
Solubility	0.27 g/ 100g water at 18°C
Molecular Weight	25.94
Structure	Cubic Crystal
Cleavage Plane	(100)

    About Our Company:   Beijing Glass Research Institute founded in 1960s, we are the state owned institute pioneered in optical materials. Over 53 years, we have been growing accompanied by contributing to domestic and international projects in diverse areas of science and industry. Continued focus on innovation won us more than 140 awards.   Since 1966, our institute makes out the first optical fiber in China. Now we have the certification and permission on various national military or weapon projects.   From the 1st January 2013, our higher authoritiesreorganized the advantage resources and established the Scitlion Technology, all the staffs and businesses in Beijing Glass Research Institute are transferred into this new company. New company acts as the brother company of the Institute.   Now our company has 5 business units, they are 1.Crystal, which include FLUORIDE Crystal and Scintillation Crystal growth and processing; 2. Specialty fiber, which includes various silica fiber applied in UV , visible ,infrared range and polarization maintaining optical fiber, 3.Optical processing, like the Windows, Mirrors, Lenses, Prisms, Filters; 4.Special glass, mainly the sealing glass and lubricant glass; 5.Temperature components, such as Beckman thermometer, industrial thermistors.