aragonite
Học thuậtThân thiện
Definition
Noun: A mineral form of crystalline calcium carbonate (CaCO₃). It is dimorphic with calcite, meaning it shares the same chemical composition but has a different crystal structure.
Usage
The word "arragonite" is used specifically in geology, mineralogy, and related scientific fields to identify and describe this particular mineral form. * Aragonite is often found in the shells of many marine organisms. * The cave formations included both calcite and aragonite crystals. * This sample was identified as arragonite based on its orthorhombic crystal structure.
Advanced Usage
- Polymorphism: Aragonite is a classic example of a polymorph, specifically a dimorph, of calcium carbonate. Its stability field is at higher pressures than calcite.
- Biomineralization: Aragonite is a key biomineral, deposited by organisms like corals, mollusks, and some algae to form skeletons and shells.
Variants and Related Words
- Aragonitic (adjective): Describing something composed of or containing aragonite.
- The aragonitic skeleton of the coral was delicate.
Synonyms
- Calcium carbonate (specifying the aragonite polymorph)
- (No direct common synonym; it is a specific scientific term. "Mineral" is a hypernym.)
Different Meanings
The word "arragonite" has only one primary meaning as a specific mineral. It does not have other common definitions, idiomatic uses, or phrasal verbs.
Noun
- a mineral form of crystalline calcium carbonate; dimorphic with calcite