W.Kaminsky, S.Haussühl: Anisotropy of the Faraday effect in non-cubic crystals. Z.Kristallogr. 203 (1993) 79-91.
The anisotropy of the Faraday effect was studied on 15 optically uniaxial and biaxial crystals by an automated procedure of high resolution. The Faraday tensor of these crystals appears to be not quasi-isotropic. In the vicinity of the phase transitions strong anomalies were observed.