Polyamorphic systems: Difference between revisions
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Some solid compounds can exist in two or more '''polymorphs''' with different atomic structures but the same chemical composition. | |||
In the case of a pure element, this behavior is termed '''allotropy''' (Ref. 2). | |||
The existence of liquid polymorphs is known as '''polyamorphism''', i.e. the ability of a substance to exist in several different amorphous modifications. | |||
Note: glasses are not in thermodynamic equilibrium, so such transformations do not correspond to true phase transitions from one stable liquid to another (Ref. 1). | |||
===Polyamorphic systems=== | |||
*[[Germanium]] | *[[Germanium]] | ||
*[[n-butanol]] | *[[n-butanol]] | ||
Revision as of 14:28, 30 April 2007
Some solid compounds can exist in two or more polymorphs with different atomic structures but the same chemical composition. In the case of a pure element, this behavior is termed allotropy (Ref. 2). The existence of liquid polymorphs is known as polyamorphism, i.e. the ability of a substance to exist in several different amorphous modifications. Note: glasses are not in thermodynamic equilibrium, so such transformations do not correspond to true phase transitions from one stable liquid to another (Ref. 1).
Polyamorphic systems
- Germanium
- n-butanol
- Phosphorous
- Ramp model
- Roberts and Debenedetti model
- Hemmer and Stell model
- Silica
- Triphenyl phosphite
- Water