Diamond and graphite are two allotropes of the element carbon . Ozone is a chemically active triatomic allotrope of the element oxygen . Phosphorus , sulfur , and tin also exhibit allotropy.
Many metals have allotropic crystalline forms that are stable at different temperatures.
Polymorphism is an analogous phenomenon observed in chemical compounds. Listing from Electric Library , a pay service. No relevant pictures or maps found. The Columbia Electronic Encyclopedia, Sixth Edition Copyright 2000, Columbia University Press. Copyright 2001 Infonautics Corporation .