Refractive index database

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Optical constants of Sc2O3 (Scandium sesquioxide)
Belosludtsev et al. 2018: n,k 0.270–1.200 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Conditions & Spec sheet

n_is_absolute: true
wavelength_is_vacuum: true
film_thickness: 270e-9
substrate: SiO2


Stoichiometric 270±5 nm film on SiO2 substrate.


A. Belosludtsev, K. Juškevičius, L. Ceizaris, R. Samuilovas, S. Stanionytė, V. Jasulaitienė, S. Kičas. Correlation between stoichiometry and properties of scandium oxide films prepared by reactive magnetron sputtering, Appl. Surf. Sci. 427, 312-318 (2018) (Numerical data kindly provided by Alexandr Belosludtsev)


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Scandium sesquioxide, Sc2O3

Scandium sesquioxide (Sc2O3) is a white solid compound that is classified as a rare earth oxide. It exhibits a high melting point and stability under various conditions. Scandium sesquioxide is transparent to infrared light, making it useful for certain optical applications. In the world of research, Sc2O3 is used as a starting material for the synthesis of scandium-containing compounds and is often employed as a dopant in various materials to improve their luminescent properties. Additionally, due to its relatively high dielectric constant and good thermal conductivity, scandium sesquioxide has been investigated for potential applications in electronics. Overall, while its use is niche, it remains an important compound in both the optical and electronic materials domains.

Other names

  • Scandia
  • Scandium(III) oxide
  • Discandium trioxide
  • Scandium oxide

External links