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Latest Calcite Stories

aragonite crystal
2014-09-07 03:00:23

Study shows calcium carbonate takes multiple, simultaneous roads to different minerals, provides insight into trapping carbon dioxide in underground rock.

Ancient Climate Change Evidence From Fossilized Plankton
2013-10-26 05:41:11

Climate change dating as far back as hundreds of million years ago was recorded in the shells of ancient oceanic plankton, according to new research published in the journal Earth and Planetary Sciences Letters.

2012-04-03 08:40:22

Corals may be better placed to cope with the gradual acidification of the world’s oceans than previously thought – giving rise to hopes that coral reefs might escape climatic devastation.

Structure Of Tough Sea Urchin Spines May Inspire Engineers
2012-02-16 14:10:27

A team of German scientists recently decoded the molecular structure of the unusually sturdy spines of sea urchins, a discovery that they believe could eventually prove useful in helping engineers construct stronger, more stable buildings.

2011-05-10 16:02:52

The acidification of the world’s oceans could have major consequences for the marine environment.

1e541c8ddbe28a46076b84edebbc53ae1
2011-02-23 10:56:19

An international research team, with Spanish participation, has discovered a new species of mollusk, Polyconites hadriani, in various parts of the Iberian Peninsula.

4f1dd5ddbc07f25308a3e381b4642a4f
2011-02-02 06:00:00

Researchers in Britain and Denmark have unveiled an ‘invisibility cloak’ that uses a common crystalline material known as calcite, which works by sending its two "polarizations" of light in different directions.

2010-11-18 09:15:00

The ability to tell the difference between crystals that formed naturally and those formed by human activity can be important to archaeologists in the field.

6b604c1311781263aa087c385655aae7
2010-07-15 06:35:00

Which came first: the chicken or the egg? It is an age old question that has spurred on many a debate, but now a group of scientists might actually be close to having an answer.

2010-03-08 12:47:48

Scientists have made synthetic ‘sea shells’ from a mixture of chalk and polystyrene cups – and produced a tough new material that could make our homes and offices more durable.


Latest Calcite Reference Libraries

28_3f12abda63415a07ee5b6c5d30ef8239
2005-05-26 12:17:18

Aragonite is a polymorph of the mineral calcite, both having the chemical composition CaCO3. Its structure differs from calcite and leads to a different crystal shape, an orthorhombic system with acicular crystals. By repeated twinning pseudo-hexagonal forms result. It may be columnar or fibrous, occasionally in branching stalactitic forms called flos-ferri (flowers of iron) from their association with the ores at the Carthinian iron mines. The type location for aragonite is Molina de...

28_9c404ab9a4754b403781670c9e631915
2005-05-26 11:59:32

he mineral calcite is a calcium carbonate corresponding to the formula CaCO3 and is one of the most widely distributed minerals on the Earth's surface. It is a common constituent of sedimentary rocks, limestone in particular. It is also the primary mineral in metamorphic marble. It also occurs as a vein mineral in deposits from hot springs, and also occurs in caverns as stalactites and stalagmites. Calcite is often the primary constituent of the shells of marine organisms (e.g. plankton,...

28_af149e6f4821ab4ec3c213f12d27e305
2005-05-26 09:38:30

Limestone is a sedimentary rock composed of the mineral calcite (calcium carbonate). The primary source of this calcite is usually marine organisms. These organisms secrete shells that settle out of the water column and are deposited on ocean floors as pelagic ooze (see lysocline for information on calcite dissolution). Secondary calcite may also be deposited by supersaturated meteoric waters (groundwater that precipitates the material in caves). This produces speleothems such as stalagmites...

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Word of the Day
edulcoration
  • The act of sweetening by admixture of some saccharine substance.
The word 'edulcoration' comes from a Latin word meaning 'making sweet'.