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aragonite

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
a·rag·o·nite  (-rg-nt, r-g-)
n.
An orthorhombic mineral form of crystalline calcium carbonate, dimorphous with calcite.

[After Aragon.]

aragonite [əˈrægəˌnaɪt]
n
(Earth Sciences / Minerals) a generally white or grey mineral, found in sedimentary rocks and as deposits from hot springs. Composition: calcium carbonate. Formula: CaCO3. Crystal structure: orthorhombic
[from Aragon + -ite1]

aragonite  (-rg-nt, r-g-)
A usually white, yellowish, or pink orthorhombic mineral that can occur in many different colors. Aragonite occurs as acicular (needlelike) or tabular crystals, or as fibrous aggregates. It is found in gypsum deposits, at the tips of calcite crystals, in mollusk shells and pearls, and in living reef structures. It is a polymorph of calcite. Chemical formula: CaCO3.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.aragonite - a mineral form of crystalline calcium carbonate; dimorphic with calcite
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition


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? Mentioned in ? References in periodicals archive
 
In nacre, 3,000 to 4,000 layers of offset, aragonite bricks are locked together by thin layers of organic glue.
Another example of microstructural control is that aragonite with complex microstructures can dissolve more rapidly than thermodynamically less stable magnesian calcite (Walter, 1985).
Precipitated calcium carbonate (PCC) has seen a trend away from rhombohedral (a spherical pigment) to aragonite PCC (an acicular pigment).
 
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