Thermomicroscopy analyses consists of a group of techniques in which physical, optical characteristics of a substance being measured as a function of temperature or time while the sample is subjected to a predefined heating or cooling program in a specified atmosphere. Polymorphism is the ability of an element or compound to crystallize as more than distinct crystal species; for example, carbon as a cubic diamond or hexagonal graphite. Different polymorphs of a given compound generally as different in structure and properties s the crystals of two different compounds. Solubility, hardness, crystal habit (shape, optical and electrical properties or vapor phase all vary with the polymorphic form.
Thermomicroscopy can be used to ascertain: