aragonite

/uh-rag-uh-nahyt, ar-uh-guh-/US // əˈræg əˌnaɪt, ˈær ə gə- //UK // (əˈræɡəˌnaɪt) //

文石,文石类

Definitions

n.名词 noun

1
- : a mineral, orthorhombic calcium carbonate, CaCO3, chemically identical with calcite but differing in crystallization and in having a higher specific gravity and less marked cleavage.

Aragonite occurs in very small masses, of a light yellow color and fibrous structure, between layers of serpentine.
Aragonite, a mineral formed of calcium carbonate crystallized in the rhombic system; specific gravity 2.94 (compare Calcite).
In the first class 74 are included sulphur and ammonium nitrate; monotropy is exhibited by aragonite and calcite.
The shell consists of carbonate of lime, under one or both of the forms known to mineralogists as calcite and aragonite.
Like aragonite it is very frequently twinned, the compound crystals being pseudo-hexagonal in form.