Paramagnetic Susceptibilities of the Chromium (III) Halides

Abstract

The paramagnetic susceptibilities of CrF₃, CrCl₃, CrBr₃, and CrI₃ have been measured by the Gouy method from room temperature down to a temperature at which the susceptibility is field‐dependent. Above approximately 100°K these susceptibilities all obey the Curie‐Weiss law with respective constants as follows: θ(°K) = — 124, 31, 51, and 70; P_eff (Bohr magnetons) = 3.85, 3.69, 3.94, and 4.03. CrF₃ evidently becomes ferrimagnetic below 70°K.