Research Note: Dichroic Ratio of a Group of Overlapping Bannds in the Near Infrared Region

Hitherto, dichroic ratios of vibrational bands have been investigated only for single, isolated bands. Such bands occur very rarely in the IR and this fact among others limits the validity of dichroim measurements in structural research. It is also possible to define the dichroic ratio for a group of overlapping bands as can be shown from an example of thiourea single crystals. The theoretical treatment of this phenomenon will be published later.