Charles-Victor Mauguin

Charles-Victor Mauguin
Born	19 July 1878
Died	25 April 1958
Nationality	French
Fields	Mineralogy
Known for	Hermann–Mauguin notation

French professor of mineralogy Charles-Victor Mauguin (19 July 1878 – 25 April 1958) was inventor (with Carl Hermann) of an international standard notation for crystallographic groups known as the Hermann–Mauguin notation or International notation.

Mauguin was the first to notice that when he sandwiched the semi-solid liquid crystals between two aligned polarizers, he could twist them in relation to each other, but the light continued to be transmitted. This phenomenon is called Mauguin regime (waveguide regime) in twisted nematic effect ^{[1] [2]} .

1. Mauguin, C.: Sur les cristaux liquides de Lehman. Bull. Soc. Fr. Miner. 34, 71–117 (1911)
2. Blinov L.M. Structure and Properties of Liquid Crystals (Springer, 2011), pp. 439. ISBN 978-90-481-8828-4 Chapter 11.