Calcite
Calcite
Calcite (/ˈkælsaɪt/) is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The other polymorphs are the minerals aragonite and vaterite.
Etymology
The term "Calcite" is derived from the German Calcit, a term from the 19th century that came from the Latin word calx, meaning lime.
Description
Calcite crystals are trigonal-rhombohedral, though actual calcite rhombohedra are rare as natural crystals. However, they show a remarkable variety of habits including acute to obtuse rhombohedra, tabular forms, and prisms.
Occurrence
Calcite is found in spectacular form in the Snowy River Cave of New Mexico as mentioned below. The stalagmites of these caves, which are competitively sought after by mineral collectors, are generally in the form of stalagmite or "cave popcorn," a speleothem.
Uses
Calcite is often used for its luminescence properties in demonstrating the principles of photonics. It is also used in the construction industry as a building material and aggregate for road construction. In the pharmaceutical industry, it is used as an inexpensive dietary calcium supplement and antacid.
Related Terms
External links
- Medical encyclopedia article on Calcite
- Wikipedia's article - Calcite
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