Refractive index database

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Optical constants of Ag3AsS3 (Silver arsenic sulfide)
Hulme et al. 1967: n(e) 0.59–4.6 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



Extraordinary ray (e), 20 °C


K. F. Hulme et al. Synthetic proustite (Ag3AsS3): a new crystal for optical mixing, Appl. Phys. Lett. 10, 133-135 (1967)


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Silver arsenic sulfide, Ag3AsS3

Ag3AsS3 is a ternary chalcogenide compound with a crystalline structure that exhibits nonlinear optical properties and semiconducting behavior. Composed of silver (Ag), arsenic (As), and sulfur (S), this material belongs to a class of compounds that has been studied for its potential applications in optoelectronic devices, photodetectors, and as waveguide materials in the mid-infrared spectrum. Its electronic structure gives rise to specific optical characteristics, such as a defined bandgap energy and a high refractive index, which are crucial for its applicability in photonic and electronic systems. In the realm of nonlinear optics, Ag3AsS3 has been explored for its second- and third-harmonic generation capabilities. Due to the presence of arsenic, the material requires careful handling and processing protocols to mitigate toxicity risks. Rigorous spectroscopic and computational analyses are often performed to understand its electronic and optical behavior under varying conditions of temperature and pressure. Overall, Ag3AsS3 remains an intriguing subject of study in material science, offering a unique combination of properties that may prove pivotal for future advancements in optoelectronics and photonics.

Other names

  • Silver arsenic sulphide
  • Silver sulfarsenide


  • Proustite
  • Xanthoconite

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