Niobium Iodide (NbI5)-Powder

Characteristic

Niobium pentaiodide is the inorganic compound with the formula Nb₂I₁₀. It is a yellow, moisture-sensitive, diamagnetic solid. It forms upon heating metallic niobium with iodine.

Chemical formula：Nb₂I₁₀

Molar mass：1475

Appearance：yellow solid

Density：5.30 g/cm3

Melting point：543 °C (1,009 °F; 816 K) sublimes

Application

It is also used as a scintillation gamma radiation detector, typically doped with europium, due to its optical clarity, relatively high density, high effective atomic number (Z=48), and high scintillation light yield. In recent years, europium-doped strontium iodide (SrI2:Eu²⁺) has emerged as a promising scintillation material for gamma-ray spectroscopy with extremely high light yield and proportional response, exceeding that of the widely used high performance commercial scintillator LaBr₃:Ce³⁺.