%0 Journal Article %T First Correct Experimental Discovery of the ¡°Weak¡± Gyrotropy-Phenomenon of ¡°Non-Gyrotropic¡± Crystals of 3 m, 4 mm, 6 mm Symmetry Classes, Using the LiNbO3 Crystal as an Example %A Alexander Kh. Zilbershtein %J Open Access Library Journal %V 8 %N 2 %P 1-6 %@ 2333-9721 %D 2021 %I Open Access Library %R 10.4236/oalib.1107194 %X The purpose of the work was the correct experimental discovery of the effect of ¡°weak¡± gyrotropy of the ¡°non-gyrotropic¡± transparent crystals. The original experiment was based on the study of the light transmission (T) of the system: Polarizer¡ªwedge-shaped Crystal¡¯s sample¡ªAnalyzer (orthogonal to Polarizer). It was shown that: if the optical axis of the crystal is parallel to the rib of the wedge and to the polarization of the linear-polarized incident light, then the transmission T of the system can be not equal to zero (due to existence of nonzero components (G12) of the antisymmetric pseudotensor of gyration {G} described the ¡°weak¡± gyrotropy). Using the LiNbO3 crystal as an example, such nonzero T was at the first time experimentally discovered. Absolute value of components G12 of the LiNbO3 crystal was first estimated: ([G12] = (1.50 /- 0.51) 10-6). %K Crystals %K Light %K Polarization %K Weak Gyrotropy %K Wedge-Shaped Sample %K Vector of Electric Field Strength %K Wave Vector %K Optical Axis %K Nonzero Transmission %U http://www.oalib.com/paper/6365531