Difference between revisions of "Allotropy"
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'''Allotropy''' is a phenomenon in chemistry whereby a given [[chemical element]] can exist in several different structural forms.<ref>{{GoldBookRef|title=allotropes|file=A00243|accessdate=2010-04-05}}.</ref> Each of these forms is called an '''allotrope'''. The best known example is that of [[diamond]] and [[graphite]], which are both allotropes of [[carbon]]. Allotropy can be seen as a special case of [[polymorphism]]. | '''Allotropy''' is a phenomenon in chemistry whereby a given [[chemical element]] can exist in several different structural forms.<ref>{{GoldBookRef|title=allotropes|file=A00243|accessdate=2010-04-05}}.</ref> Each of these forms is called an '''allotrope'''. The best known example is that of [[diamond]] and [[graphite]], which are both allotropes of [[carbon]]. Allotropy can be seen as a special case of [[polymorphism]]. | ||
| − | The term was first proposed by [[Jöns Jakob Berzelius]] in 1841:<ref>{{citation | last = Jensen | first = W. B. | title = The Origin of the Term Allotrope | journal = J. Chem. Educ. | year = 2006 | volume = 83 | issue = 6 | pages = 838–39 | doi = 10.1021/ed083p838}}.</ref> it is derived from the Greek {{Polytonic|άλλοτροπἱα}} (''allotropia''; variation, changeableness).<ref>{{Citation | contribution = allotropy | title = A New English Dictionary on Historical Principles | volume = 1 | publisher = Oxford University Press | year = 1888 | page = 238}}.</ref> | + | The term was first proposed by [[Jöns Jakob Berzelius]] in 1841:<ref>{{citation | last = Jensen | first = W. B. | title = The Origin of the Term Allotrope | journal = J. Chem. Educ. | year = 2006 | volume = 83 | issue = 6 | pages = 838–39 | doi = 10.1021/ed083p838}}.</ref> it is derived from the Greek {{Polytonic|άλλοτροπἱα}} (''allotropia''; variation, changeableness), from {{Polytonic|ἄλλος}} (''allos''; other, different) and {{Polytonic|τρόπος}} (''tropos''; turn of mind, manner).<ref>{{Citation | contribution = allotropy | title = A New English Dictionary on Historical Principles | volume = 1 | publisher = Oxford University Press | year = 1888 | page = 238}}.</ref> |
==References== | ==References== | ||
Revision as of 10:25, 5 April 2010
Allotropy is a phenomenon in chemistry whereby a given chemical element can exist in several different structural forms.[1] Each of these forms is called an allotrope. The best known example is that of diamond and graphite, which are both allotropes of carbon. Allotropy can be seen as a special case of polymorphism.
The term was first proposed by Jöns Jakob Berzelius in 1841:[2] it is derived from the Greek άλλοτροπἱα (allotropia; variation, changeableness), from ἄλλος (allos; other, different) and τρόπος (tropos; turn of mind, manner).[3]
References
- ↑ allotropes, <http://goldbook.iupac.org/A00243.html> (accessed 5 April 2010), Compendium of Chemical Terminology Internet edition; International Union of Pure and Applied Chemistry (IUPAC).
- ↑ Jensen, W. B. The Origin of the Term Allotrope. J. Chem. Educ. 2006, 83 (6), 838–39. DOI: 10.1021/ed083p838.
- ↑ allotropy. In A New English Dictionary on Historical Principles; Oxford University Press, 1888; Vol. 1, p 238.
External links
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See also the corresponding article on Wikipedia. |
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