Examples from the Web for allotropy
Thus carbon occurs as the diamond, and as charcoal and plumbago, and is therefore regarded as a substance subject to allotropy.
Allotropy has turned the eyes of many back to the remoter past.Jewel Mysteries|Max Pemberton
This would be quite in accordance with the chemical notion of allotropy.The Making of Species|Douglas Dewar
Before leaving this phase of inorganic chemistry, we may mention other historical examples of allotropy.
And this hypothesis is entirely in harmony with the phenomena of allotropy.Essays: Scientific, Political, & Speculative, Vol. I|Herbert Spencer