allotropyn.

1845 tr. C. F. Naumann in Edinb. New Philos. Jrnl. 39 37 How little, in all cases, resemblance is founded on identity of composition, is rendered so distinctly apparent by the allotropy (allotropie) of the elements themselves, and by the dissimilarity of their isomeric combinations, that all proofs of the assertion would be quite superfluous.

1863 H. Watts Dict. Chem. II. 423 Instances of inorganic isomerism are usually called instances of allotropy..Sulphur, phosphorus, carbon, and many other elements present..examples of allotropy.

1908 Proc. Royal Soc. A. 81 333 For still lower concentrations of tin the change could not be observed.., thus proving that the change in question is not simply due to allotropy in lead, but that the presence of tin is essential to its occurrence.

1932 Proc. National Acad. Sci. U.S.A. 18 144 (title) Allotropy of liquid benzene.

1946 Mod. Philol. 43 280 The sacramental allotropy of the Song of Songs remains the most impressive feat of an inspirational hermeneutic that stops at nothing.

1954 A. J. Berry From Classical to Mod. Chem. ix. 234 The allotropy of iron is extremely complex and, in view of its bearing on the tempering of steel, has been extensively studied by metallurgists.

1999 J. Stewart Vital Art D. H. Lawrence iv. 87 Empathy binds the invisible allotropy of her being to his ritualized act.

2008 Guardian (Nexis) 17 Apr. 4 Research was carried out into the allotropy of tin 80 years ago.