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Topic: Allotropy

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Allotropes of carbon

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	Allotropy - Wikipedia
		Some classic examples of solids showing allotropy are phosphorus (in "red" and "white" forms) and carbon (in the form of graphite, diamond, or fullerenes).
		Allotropy specifically refers to the chemical bond structure between atoms and should not be confused with the existence of multiple physical states, such as with water, which can exist as a gas (steam), a liquid (water), or a solid (ice).
		The word allotropy is usually restricted to the case of pure elements and is a special case of Polymorphism.
	nostalgia.wikipedia.org /wiki/Allotrope (378 words)

	Allotropy - Wikipedia, the free encyclopedia
		Amorphous (plastic sulfur) is produced by quickly cooling the crystalline form, generating helical structure with eight atoms per spiral.
		Allotropy specifically refers to the chemical bond structure between atoms of the same kind and should not be confused with the existence of multiple physical states, such as with water, which can exist as a gas (steam), a liquid (water), or a solid (ice).
		As can be seen with the example of carbon allotropes, certain physical properties can vary dramatically from allotrope to allotrope.
	en.wikipedia.org /wiki/Allotropy (513 words)

	BBC - h2g2 - Allotropy - Some Familiar Examples
		Allotropy is a specific form of polymorphism, which is the existence of a substance in more than one crystal form.
		Elements exhibiting allotropy can be found almost anywhere in the Periodic Table, although they are particularly common in Group 4.
		Phosphorus is an excellent example of an element which exhibits allotropy as its various allotropes have strikingly different properties.
	www.bbc.co.uk /dna/ww2/A3889155 (2848 words)

	allotropy -- Encyclopædia Britannica (Site not responding. Last check: 2007-11-04)
		The allotropy of selenium is not as extensive as that of sulfur, and the allotropes have not been studied as thoroughly.
		In sulfur, allotropy arises from two sources: (1) the different modes of bonding atoms into a single molecule and (2) packing of polyatomic sulfur molecules into different crystalline and amorphous forms.
		Dutch chemist noted for his extensive work on the allotropy of metals, particularly tin, and for his research in piezochemistry and electrochemical thermodynamics.
	www.britannica.com /eb/article-9005829 (344 words)

	allotropy (Site not responding. Last check: 2007-11-04)
		The prevailing crystal structure depends on both the temperature and the external pressure.
		One familiar example is found in carbon: graphite is the stable polymorph at ambient conditions, whereas diamond is formed at extremely high pressures.
		The unit cell and the micrograph of the crystal are shown in Figures (2) and (3).
	info.lu.farmingdale.edu /depts/met/met205/allotropy.html (132 words)

	Encyclopedia: Allotropy
		A natural, 4 tonne, block of ice on a beach in Iceland Icicles Ice is frozen water (one of its three phases of matter), and thereby a transparent, crystal, soft and fragile solid.
		These phases of water are not allotropes, since they are caused by changes in the physical bonding between water molecules, rather than changes in the chemical bonding of the water molecules themselves.
		Jump to: navigation, search General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16, 3, p Appearance lemon yellow Atomic mass 32.
	www.nationmaster.com /encyclopedia/Allotropy (1372 words)

	Fountain Square Main Street: Allotropy (Site not responding. Last check: 2007-11-04)
		Primary Colours Allotropy is a large-scale juried art event that combines a variety of artistic mediums with musical performances.
		This upcoming Allotropy (Oct. 7-8th, 2005, 5-11pm) will be the eighth installment of what has become a signature event for Primary Colours.
		Allotropy is unique in its focus on higher caliber contemporary work.
	www.discoverfountainsquare.com /events/allotropy2005.htm (282 words)

	AllRefer.com - allotropy (Chemistry) - Encyclopedia
		You are here : AllRefer.com > Reference > Encyclopedia > Chemistry, General > allotropy
		A chemical element is said to exhibit allotropy when it occurs in two or more forms in the same physical state; the forms are called allotropes.
		Allotropes generally differ in physical properties such as color and hardness; they may also differ in molecular structure or chemical activity, but are usually alike in most chemical properties.
	reference.allrefer.com /encyclopedia/A/allotrop.html (190 words)

	BBC - h2g2 - Allotropy - Some Familiar Examples
		Below 13°C, tin metal slowly changes to the powdery alpha allotrope, and so the metal crumbles, the phenomenon being known as 'tin disease' or 'tin pest'.
		Phosphorus is an excellent example of an element that exhibits allotropy, as its various allotropes have strikingly different properties.
		The above two modifications, with a range of stability and a definite transition temperature, is the best-known example of enantiotropic allotropy, or enantiotropism.
	212.58.224.86 /dna/ww2/A5759517 (2816 words)

	Allotropy - Internet-Encyclopedia.com (Site not responding. Last check: 2007-11-04)
		Graphite can be oxidized by nitric acid to give compounds related to benzene whereas diamond does not give compounds related to benzene.
		Read about allotropy in the free online encyclopedia and dictionary.
		Find results for allotropy and anything else you are looking for instantly!
	www.internet-encyclopedia.com /ie/a/al/allotropy.html (514 words)

	Allotropy
		This is the definition of the term Allotropy
		Allotropy (n.) The property of existing in two or more conditions which are distinct in their physical or chemical relations.
		For people who have trouble spelling, this is the defintion of the term Allotropy
	linkspider.serversystems.net /dictionary/lookup/allotropy (79 words)

	BookkooB : Allotropy of Carbon and Sulphur - David Layton : Compare Book Prices
		Allotropy of Carbon and Sulphur (Enquiries in Chem.)
		Above you will see price and availability details for Allotropy of Carbon and Sulphur by David Layton from the leading UK book stores.
		View other editions of Allotropy of Carbon and Sulphur.
	www.bookkoob.co.uk /book/0050015087.htm (260 words)

	allotropy
		to turn: cf F. allotropie.] (Chem.) The property of existing in two or more conditions which are distinct in their physical or chemical relations.
		Note: Thus carbon occurs crystallized in octahedrons and other related forms, in a state of extreme hardness, in the diamond; it occurs in hexagonal forms, and of little hardness, in fl lead; and again occurs in a third form with entire softness, in lampfl and charcoal.
		From WordNet r 1.6 [wn]: allotropy n : the phenomenon of an element existing in two or more physical forms [syn: {allotropism}]
	www.beetfoundation.com /words/a/allotropy.html (209 words)

	Allotropy from LiveJournal (Site not responding. Last check: 2007-11-04)
		Results 1-4 of about 4 for the Allotropy (0.08 sec)
		At using attention fact central nervous system: Weakness, fatigue, dejection and insecurity, headache and soul allotropy amiableness total: It comes, loss of appetite and indigestion easy rain throat total: Magnetic pole, conjunctivitis and corneitis blood male line of eye: The case the promotion of takeoff and...
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	www.ljseek.com /search/Allotropy (176 words)

	POLYMORPHISM-ALLOTROPY-ISOMORPHISM
		Under different conditions of temperature and pressure an element can exist in more than one
		This phenomenon is known as Allotropy and different forms are known as "Allotropes"
		Coal, lamp fl, coke, Diamond, graphite etc. are all allotropic forms of carbon.
	www.citycollegiate.com /solid2.htm (190 words)

	allotropy - definition, thesaurus and related words from WordNet-Online (Site not responding. Last check: 2007-11-04)
		allotropy - definition, thesaurus and related words from WordNet-Online
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		allotropy, allotropism - the phenomenon of an element existing in two or more physical forms
	www.wordnet-online.com /allotropy.shtml (47 words)

	Allotropy and It's you it is not us... Two poems of Andre Breton (Site not responding. Last check: 2007-11-04)
		Allotropy and It's you it is not us...
		It's me pull yourself together if you want me to put you together
		Where is the fire going the fire that doesn't fear the wind
	www.krokodile.co.uk /out2/allotropy.htm (409 words)

	ADISON / THE ALLOTROPY OF THE ELEMENTS: CHEMISTRY - INORGANIC: Antiquarian & Unusual Books (Site not responding. Last check: 2007-11-04)
		ADISON / THE ALLOTROPY OF THE ELEMENTS: CHEMISTRY - INORGANIC: Antiquarian & Unusual Books
		ADISON / THE ALLOTROPY OF THE ELEMENTS [Topics include:- allotropy, elements, allotropes, periodic table, atomic orbital,, The Allotropy of the Elements.]
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	www.parki.com /325d.htm (89 words)

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