Sulfur is a pale yellow, odorless and brittle material. It
displays three allotropic forms: orthorhombic, monoclinic and amorphous. The
orthorhombic form is the most stable form of sulfur. Monoclinic sulfur exists
between the temperatures of 96°C and 119°C and reverts back to the orthorhombic
form when cooled. Amorphous sulfur is formed when molten sulfur is quickly
cooled. Amorphous sulfur is soft and elastic and eventually reverts back to the
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