One of the primary driving forces behind this phenomenon is the high number of coordination numbers an element can have.
One of the primary driving forces behind this phenomenon is the high number of coordination numbers an element can have. This process can be seen when two elements are above and below the transition temperature, which feature two different crystal systems. One example of this property is exhibited by (*) iron becoming austenite at higher temperatures, but ferrite at lower. For 10 points, name this phenomenon exemplified by coal, graphite, and diamond, in which an element comes in multiple forms.
One of the primary driving forces behind this phenomenon is the high number of coordination numbers an element can have.
{allotropy} [accept word forms]