Search results
Results From The WOW.Com Content Network
Phase transitions (phase changes) that help describe polymorphism include polymorphic transitions as well as melting and vaporization transitions. According to IUPAC, a polymorphic transition is "A reversible transition of a solid crystalline phase at a certain temperature and pressure (the inversion point) to another phase of the same chemical composition with a different crystal structure."
In materials science, a disappearing polymorph is a form of a crystal structure (a morph) that is suddenly unable to be produced, instead transforming into a different crystal structure with the same chemical composition (a polymorph) during nucleation.
Polymorphism (materials science), the existence of a solid material in two or more crystal structures, known as polymorphs; Polymorph, a marketing name for polycaprolactone, a type of thermoplastic which fuses at 60 °C
Pages in category "Polymorphism (materials science)" The following 17 pages are in this category, out of 17 total. This list may not reflect recent changes. ...
Polymorphism is the occurrence of multiple crystalline forms of a material. It is found in many crystalline materials including polymers, minerals, and metals. According to Gibbs' rules of phase equilibria, these unique crystalline phases are dependent on intensive variables such as pressure and temperature.
Many compound materials exhibit polymorphism, that is they can exist in different structures called polymorphs. Silicon carbide (SiC) is unique in this regard as more than 250 polymorphs of silicon carbide had been identified by 2006, [1] with some of them having a lattice constant as long as 301.5 nm, about one thousand times the usual SiC lattice spacings.
Polymorphism is the ability of a solid to exist in more than one crystal form. For example, ... Dislocations are especially important in materials science, ...
In materials science, Ostwald's rule or Ostwald's step rule, conceived by Wilhelm Ostwald, [1] describes the formation of polymorphs. The rule states that usually the less stable polymorph crystallizes first. [2] Ostwald's rule is not a universal law but a common tendency observed in nature. [3]