Polymorphous
Definition and meaning of Polymorphous in chemistry.
Polymorphous describes a solid material that can exist in more than one distinct crystal structure or spatial arrangement while retaining the exact same chemical composition.
In more detail
This structural phenomenon, more formally known as polymorphism, is frequently observed in both pure elements and complex compounds. Different polymorphs of a single substance possess distinct physical properties, such as density, melting point, optical characteristics, and solubility, simply because their constituent atoms or molecules are packed differently. The specific crystal structure that ultimately forms often depends heavily on the temperature, pressure, and solvent conditions present during the initial crystallization process.
Key facts
| Field | Physical Chemistry |
|---|---|
| Equivalent Term for Elements | Allotropy |
| Formula Example | CaCO3 |
Calcium carbonate (CaCO3) is highly polymorphous, naturally occurring as the minerals calcite, aragonite, and vaterite, which all have identical chemical formulas but totally different crystal lattice structures.
Frequently asked questions
Why is polymorphism important in pharmaceuticals?
Different polymorphs of an active drug ingredient can have drastically different solubility rates, affecting how much of the drug is absorbed by the body.
Can one polymorph convert into another?
Yes, polymorphs can undergo phase transitions when subjected to changes in temperature or pressure.