Sulfur is a mineral from the class of native elements. Sulfur is an example of a well-defined enantiomorphic polymorphism. In nature, it forms 2 polymorphic modifications: a-rhombic sulfur and b-monoclinic sulfur. At atmospheric pressure and a temperature of 95.6°C, a-sulfur passes into b-sulfur. Sulfur is vital for the growth of plants and animals, it is part of living organisms and their decomposition products, it is abundant, for example, in eggs, cabbage, horseradish, garlic, mustard, onions, hair, wool, etc. It is also present in coal and oil.