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You are here: Home / Fluoride Crystal / NaF

Sodium fluoride (NaF) is an inorganic salt, which is an important source of the fluoride ion for many applications. Sodium fluoride single crystal has a good transmission for more than 50% from 130nm to 13um.And the refractive index is very low. It is a simple ionic compound, made of the sodium (Na+) cation and fluoride (F-) anion. The solid salt exists as cubic crystals similar to the crystal structure of sodium chloride (NaCl). Sodium fluoride occurs in nature as the rare mineral villiaumite, in very small quantities. Sodium fluoride is widely used as a fluorinating agent in toothpastes and water supplies to maintain dental health. It is also used as a wood preservative, corrosion inhibitor, cleaning agent, insecticide, chemical reagent, and in metallurgy and glass industries. Another important application is in nuclear medical imaging, where radioactive sodium fluoride (NaF18) is used as a radiotracer for detecting various conditions. As a kind of alkali halide crystal, sodium fluoride single crystal has a wide range of optical tansmission, but it has not been paid much attention because it is inferior to other crystals (such as calcium fluoride, magnesium fluoride, etc.) in mechanical properties and corrosion resistance In recent years, with the continuous progress in the application of color centers in crystal materials, sodium fluoride crystal has become a remarkable crystal material.

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Parameter

Physical and Chemical Properties
Crystal StructureSingle crystal, synthetic
Crystal TypeCubic, NaCl type
Lattice Constants4.62
Cleavage Planes-100
Density2.79 g/cm3
Melting Point996°C
Solubility in Water(g/100g)4.13
Thermal Conductivity /(W·m-1·K-1@250K)22
Specific Heat/ (J·kg-1·K-1)1088
Thermal Expansion /(10-6·K-1@298K )36
Hardness (Mohs)60
Young`s Modulus /GPa76
Shear Modulus/GPa30.7
Bulk Modulus/GPa48.5
Elastic Coefficient/GPaC11 = 97; C12 = 24.2; C44 = 28.1
Optical Characteristics
Transmission Range(50%)0.13 … 13 µm @thickness 1mm 
Refractive Index  1.324535 @0.633 µm  
Reflective Loss 1.15% @10 µm 
Poisson Ratio0.24
Dielectric Constant@292K6.0@2MHz
Reststrahlen34µm
Spectrum

Feature
Application
Literature
Feature
  • Transmission from 120nm to 7um
  • Very low refractive index
  • Unsoluble in ethanol
  • Must be kept away from oxidizing agents, metals, acids, alkalis
  • Less hygroscopic
Application
  • Cherenkov-counter, AR coating material
  • Optical glass grade coating materials
  • Medication like teeth
  • Color center laser substrate material
  • Ionizing radiation dose display material
Literature
Structure of NaF–TeO 2 glasses and glass-ceramics
A molecular dynamics simulation study of KF and NaF ion pairs in hydrothermal fluids
Efficient extraction of lithium from ?-spodumene by direct roasting with NaF and leaching
Study on micro-structure and transport properties of KF-NaF-AlF 3 -Al 2 O 3 system by first-principles molecular dynamics simulation
Relationship between lower lumbar spine shape and patient bone metabolic activity as characterised by  18 F NaF bio-markers
Remineralizing potential of dental composites containing silanized silica- hydroxyapatite (Si-HAp) nanoporous particles charged with sodium fluoride  (NaF)
Evolution of heterotopic bone in fibrodysplasia ossificans progressiva: An [ 18 F]NaF PET/CT study
Effect of NaF doping on the transparency, microstructure and spectral properties of Yb 3+ : CaF 2 transparent ceramics
Influence of NaF on the ionic conductivity of sodium aluminophosphate glass electrolytes
Thermodynamic description for the NaF-KF-RbF-ZnF 2 system

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