0 one of many forms of a chemical element. For example, coal and graphite are different forms of carbon.
1 one of many forms of a chemical element, for example, coal and graphite (= substance used in pencils) are different forms of carbon
Introduction : recently we have started a program on the synthesis and investigation of the chemical structure and properties of carbon allotropes and certain carbonaceous matter.
To give it its technical description, it is a blue gaseous allotrope of oxygen derived or formed naturally from diatomic oxygen by electric discharge or exposure to ultra-violet radiation.
From its electron diffraction pattern, the mineral has been considered to have a carbyne structure, the linear acetylenic carbon allotrope of carbon.
The alpha allotrope is rhombohedral, and the beta allotrope is tetragonal.
Through catalysis's and convoluted magnetic fields the reactors convert ultra-pure hydrogen into an exotic allotrope of hydrogen, ekti.
At very high pressures carbon forms the more compact allotrope diamond, having nearly twice the density of graphite.
Examples of solid elemental insulators are diamond (an allotrope of carbon) and sulfur.
While this allotrope is occasionally mentioned in the literature, no subsequent work appears to have been published either confirming or discrediting its existence.
