CAS 12018-18-7: Chromium nickel oxide (Cr2NiO4)

In mixing Nickel (II) Chromate with Aluminates or Cobalt Chromate, a binary compound known as a spinel is formed that is able to withstand temperatures up to 1000 °C. The products from these mixings can be used as oxidation-resistive components in airplane and space shuttle coatings. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Nickel chromite is a nickel and chromium oxide mineral that has a constant crystal structure. It has been shown to undergo a phase transition at 810°C, which is the cause of its characteristic metallic luster. Nickel chromite can be found as spherical particles with an irregular morphology or as crystalline grains with a monoclinic crystal structure. FT-IR spectroscopy and X-ray diffraction reveal that it is composed of NiO and CrO2 phases. The crystal lattice of NiO consists of nickel atoms in tetrahedral coordination, while the lattice of CrO2 consists of chromium ions in octahedral coordination. Nickel chromite is also known for having optical properties such as backscattering, channeling, and UV absorption.