Talk:Allotropy
From Academic Kids
Clearly, steam, water, and ice are not allotropes. However, what about the various solid phases of water (ice(I), ice(II), etc...)? I believe they would be considered polymorphs, but probably not allotropes because water isn't a pure element. Is this correct? --Matt Stoker
Right. Allotropy refers specifically to elements. I double-checked my understanding of this with the Penguin Dictionary of Chemistry (DWA Sharp, Penguin:1990 ISBN 0-145-051232-2), but I'd encourage anyone to consult whatever credible reference they feel necessary. --JoeAnderson
The last edit of this page commented "allotropy and isomerism are *distinct*" -- yes, but how? Roughly, is it the case that two allotropes will have completely different chemical properties (diamond vs carbon), while isomers tend to have similar properties (similar boiling points, etc)? -- Tarquin, Sunday, July 7, 2002
It is suggested that we consult the MACMILLAN ENCYCLOPEDIA of CHEMISTRY edited by J.J.Lagowski, 1997, SIMON SCHUSTER for a definitive exposition of the subjects ALLOTROPES and POLYMORPHS. It is pointed out that there is no phenomenon that results in the existence of ALLOTROPES. Allotropes exist as a result of the differing chemical bonding of the same atoms. --Anon
Why is "allotropy" a misnomer? -phma
