allotrope
Noun: A distinct structural form in which a pure chemical element can exist. Different allotropes of the same element have different physical properties (like hardness, color, or conductivity) because their atoms are arranged in different ways, even though they are composed of the same type of atom.
The word "allotrope" is used to describe and compare the different structural states of a single element. It is a scientific term, most commonly used in chemistry, materials science, and geology.
- Graphite and diamond are the two most familiar allotropes of carbon.
- Ozone (O₃) is an allotrope of oxygen, distinct from the more common diatomic oxygen (O₂).
- Scientists are researching new allotropes of phosphorus for use in semiconductors.
- The element sulfur has several allotropes, which differ in the arrangement of its S₈ rings.
- Allotropy (noun): The property of some chemical elements to exist in two or more different forms (allotropes) in the same physical state.
- The allotropy of carbon is responsible for the vast difference between soft graphite and hard diamond.
- Allotropic (adjective): Relating to or characterized by allotropy.
- The element exhibits interesting allotropic behavior at high pressures.
- Allotropy: The phenomenon or property itself.
- Allotropic: The adjective form.
- Polymorph: A more general term for a solid material that can exist in more than one form or crystal structure. While "allotrope" refers specifically to different forms of a single , "polymorph" can refer to different crystalline forms of any chemical compound or element.
- Structural form
- Phase (in a specific context of elemental solids)
- Modification
The core meaning is strictly tied to pure elements. You cannot correctly call different compounds or mixtures "allotropes" of each other. The key is identical atomic composition but different atomic bonding or crystal structure, leading to different substances.
- a structurally different form of an element
- graphite and diamond are allotropes of carbon