aragonite - définition. Qu'est-ce que aragonite
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Qu'est-ce (qui) est aragonite - définition

CARBONATE MINERAL
Aragonitic
  • Aragonite Crystal Structure

Aragonite         
·noun A mineral identical in composition with calcite or carbonate of lime, but differing from it in its crystalline form and some of its physical characters.
aragonite         
['ar?g(?)n??t]
¦ noun a mineral consisting of calcium carbonate, occurring as colourless prisms in deposits from hot springs.
Origin
C19: from the region of Aragon in Spain + -ite1.
Zbrašov Aragonite Caves         
  • The Bečva River in Teplice nad Bečvou
  • Information board on the cave system
  • Device used to measure the concentration of carbon dioxide
  • Curtain with aragonite and calcite
  • A gas lake
  • Longitudinal section of calcite formations
  • Main administrative building
  • Tools used to excavate the caves
CAVE IN THE CZECH REPUBLIC
Zbrasov aragonite caves; Zbrašov aragonite caves; Zbrašovské Aragonite Caves
The Zbrašov Aragonite Caves are a national nature monument in Teplice nad Bečvou in the Olomouc Region, Czech Republic. The main subject of protection are important hydrothermal karst areas of Europe.

Wikipédia

Aragonite

Aragonite is a carbonate mineral, one of the three most common naturally occurring crystal forms of calcium carbonate, CaCO3 (the other forms being the minerals calcite and vaterite). It is formed by biological and physical processes, including precipitation from marine and freshwater environments.

The crystal lattice of aragonite differs from that of calcite, resulting in a different crystal shape, an orthorhombic crystal system with acicular crystal. Repeated twinning results in pseudo-hexagonal forms. Aragonite may be columnar or fibrous, occasionally in branching helictitic forms called flos-ferri ("flowers of iron") from their association with the ores at the Carinthian iron mines.

Exemples du corpus de texte pour aragonite
1. Orr‘s team immersed pteropod snails in such aragonite undersaturated water.
2. The models project that: "Southern Ocean waters will begin to become undersaturated with respect to aragonite, a form of calcium carbonate, by the year 2050.