Refractive Index and Molar Refractivity of Molten AgNO 3

The refractive index of molten AgNO 3 has been measured for four wavelengths (6832 Å, 5145 Å, 4880 Å and 4579 Å) at temperatures up to about 80° C above the melting point. It is shown that the molar refractivity (R) of molten AgNO 3 calculated according to the Lorentz-Lorenz equation is temperature (t) and hence density (ϱ) dependent. The estimated dR/dt and dR/dϱ values for visible light are 1.06 · 10 -9 (m 3 /mole K) and -0.984 · 10 -9 (m 6 /kg mole), respectively.