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You are here: Home / Chloride Crystal / LaCl3

LaCl3 crystal has UCl3 type structure, space group P63/m, and it has attracted much attention for its high light output as well as good energy resolution. These unique properties made LaCl3 crystal a promising material as scintillator in the field of high-energy physics experiments and medical imaging, as well. LaCl3 (doped with 10% Ce3+) has a very high light output (49,000 photons/MeV), and fast principle decay time constant (26 ns) . These properties make LaCl3:Ce a very promising material for gamma-ray spectroscopy.

LaCl3 crystal belongs to hexagonal system, density is 3.8g/cm3. Its energy resolution is 3.1%, decay time With 26 ns and a time resolution of 224 ps, there is almost no damage after exposure to gamma rays up to 3 kGy. Such excellent scintillation performance is very rare in inorganic compounds. The energy is 60 keV to 1275 keV. Under the excitation of γ-ray source, the nonlinear response coefficient of light output is 7%, which is far superior to LSO:Ce crystal (35%), NaI: Tl crystal (15%) and CsI: Tl (20%). Based on its good numbers, this scintillation material can find its place in such applications as medical imaging, nuclear physics, X-ray diffraction, non-destructive evaluation, treaty verification and safeguards, environmental monitoring, and geological exploration.

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Parameter

Material and Specifications
MaterialLaCl3
Appearancewhite odorless powder 
Crystal structurehexagonal (UCl3 type), hP8
Space groupP63/m, No. 176
Lattice constanta = 0.74779 nm, b = 0.74779 nm, c = 0.43745 nm
Formula units (Z)2
Coordination geometryTricapped trigonal prismatic,(nine-coordinate)
Physical and Chemical Properties
Density (g/cm3) 3.8
Melting point 860 °C
Boiling point1,000 °C 
Solubility in water957 g/L (25 °C)
Optical and Spectral Properties 
Emission peak (nm)350, 430
Decay time (ns)28
Energy resolution R (%)10.5 ± 0.9
Photon yield (103 ph/MeV)34 ± 1
Light yield (photons/keV)49
Light output (photons/MeV)50,500
Absorbed γ-ray energy (keV) 662, 60
Photoelectron yield [% of NaI(TI)](for γ-rays) 35
Spectrum
LaCl3 Absorption SpectraLaCl3 Emission Spectra
LaCl3 Transmission SpectraLaCl3 Decay Time
Feature
Application
Literature
Feature
  • Excellent energy resolution
  • Good time resolution
  • High chemical resistance
  • Fast decay times – 28nsec
  • High light outputs – 49,000 Photons/MeV
  • Optical outputs with good linearity with temperature
  • Excellent radiation hardness
Application
  • Safety inspection
  • Geological exploration
  • Environmental testing
  • Medical – SPECT
  • Industrial – Well logging
  • Nuclear and high energy physics – specialist applications
Literature
Bridgman growth of LaCl 3 :Ce 3+ crystal in non-vacuum atmosphere
Comparison of LaCl 3 :Ce and NaI(Tl) scintillators in g-ray spectrometry
Dehydrogenation properties of LaCl 3 catalyzed NaAlH 4 complex hydrides
Determination of thermodynamic stability of lanthanum chloride hydrates (LaCl 3 ?xH 2 O) by dynamic transpiration method
Effect of catalyst LaCl 3 on hydrogen storage properties of lithium alanate(LiAlH 4 )
Ablation and oxidation resistance properties of C/ C composites densified by xylene pyrocarbon using LaCl 3 as a catalyst and resin carbon
Phosphorus fixation in lake sediments using LaCl 3 -modified clays
Proton response of CEPA4: A novel LaBr 3 (Ce)–LaCl 3 (Ce) phoswich array for high-energy gamma and proton spectroscopy
𝛿-RaypositionreconstructioninlargemonolithicLaCl 3 (Ce)crystalswith SiPMreadout

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