Refractive index database

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Optical constants of RbCl (Rubidium chloride)
Li 1976: n 0.18–40 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]



297 K (24 °C).


H. H. Li. Refractive index of alkali halides and its wavelength and temperature derivatives. J. Phys. Chem. Ref. Data 5, 329-528 (1976) and references therein.
* Sellmeier formula is derived by critical analysis of experimental data from several sources.


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Rubidium chloride, RbCl

Rubidium chloride (RbCl) is a white crystalline compound composed of rubidium cations (Rb+) and chloride anions (Cl-). It is highly soluble in water, producing a neutral solution. RbCl is commonly used in laboratories, especially in biochemical research as a source of rubidium ions, which have been used in various physiological studies. The compound shares many properties with other alkali metal chlorides, such as high solubility in water and a hygroscopic nature. It also has potential use in some optical and electronic applications. Due to its reactivity, especially with moisture, precautions should be taken when handling and storing this compound.