ALLOT′ROPY

Syn. Allot′ropism ; Allotro′pia , Allotropis′mus , L. Literally, a difference in character; another form of the same substance. In chemistry , a term invented, by Berzelius, to expre the state or condition, or the change of character, a umed by certain substances at different temperatures, or under different treatment, whilst their nature and composition continue the same. It more particularly relates to colour, hardne , solubility, texture, . Boron, carbon, silicon, iron, sulphur, and phosphorus, afford striking examples of the changes here referred to.