News tagged with carbonate
From lemons to lemonade: Reaction uses carbon dioxide to make carbon-based semiconductor
(Phys.org) -- A materials scientist at Michigan Technological University has discovered a chemical reaction that not only eats up the greenhouse gas carbon dioxide, it also creates something useful. And, by ...
May 21, 2012 |
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Carbon nanotubes: The weird world of 'remote Joule heating'
(Phys.org) -- A team of University of Maryland scientists have discovered that when electric current is run through carbon nanotubes, objects nearby heat up while the nanotubes themselves stay cool, like a ...
Apr 10, 2012 |
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Modified microbes turn carbon dioxide to liquid fuel
Imagine being able to use electricity to power your car — even if it's not an electric vehicle. Researchers at the UCLA Henry Samueli School of Engineering and Applied Science have for the first time ...
Mar 29, 2012 |
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Researchers develop graphene supercapacitor holding promise for portable electronics
(PhysOrg.com) -- Electrochemical capacitors (ECs), also known as supercapacitors or ultracapacitors, differ from regular capacitors that you would find in your TV or computer in that they store substantially ...
Mar 15, 2012 |
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1981 climate change predictions were eerily accurate
A paper published in the journal Science in August 1981 made several projections regarding future climate change and anthropogenic global warming based on manmade CO2 emissions. As it turns out, the authors’ ...
Space & Earth / Earth Sciences
Apr 09, 2012 |
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Thawing permafrost 50 million years ago led to extreme global warming events
In a new study reported in Nature, climate scientist Rob DeConto of the University of Massachusetts Amherst and colleagues elsewhere propose a simple new mechanism to explain the source of carbon that fed a ...
Space & Earth / Earth Sciences
Apr 04, 2012 |
4.3 / 5 (28) |
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Solar thermal process produces cement with no carbon dioxide emissions
(Phys.org) -- While the largest contributor to anthropogenic greenhouse gas emissions is the power industry, the second largest is the more often overlooked cement industry, which accounts for 5-6% of all ...
Apr 10, 2012 |
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Present ocean acidification rates are unprecedented: research
The world's oceans may be turning acidic faster today from human carbon emissions than they did during four major extinctions in the last 300 million years, when natural pulses of carbon sent global temperatures ...
Mar 01, 2012 |
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Global sea level likely to rise as much as 70 feet for future generations
Even if humankind manages to limit global warming to 2 degrees C (3.6 degrees F), as the Intergovernmental Panel on Climate Change recommends, future generations will have to deal with sea levels 12 to 22 meters (40 to 70 ...
Space & Earth / Earth Sciences
Mar 19, 2012 |
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All-carbon-nanotube transistor can be crumpled like a piece of paper
(PhysOrg.com) -- Thanks to the flexible yet robust properties of carbon nanotubes, researchers have previously fabricated transistors that can be rolled, folded, and stretched. Now a team from Japan has made ...
Mar 02, 2012 |
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New simulation predicts higher average Earth temperatures by 2050 than other models
(PhysOrg.com) -- Over the past several years, researchers have built a variety of computer simulations created to predict Earth’s climate in the future. Most recently, most models have suggested that ...
Space & Earth / Earth Sciences
Mar 26, 2012 |
3.1 / 5 (30) |
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Molecular graphene heralds new era of 'designer electrons'
Researchers from Stanford University and SLAC National Accelerator Laboratory have created the first-ever system of "designer electrons" – exotic variants of ordinary electrons with tunable properties ...
Nanotechnology / Nanomaterials
Mar 14, 2012 |
5 / 5 (18) |
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Barrier to faster graphene devices identified and suppressed
These days graphene is the rock star of materials science, but it has an Achilles heel: It is exceptionally sensitive to its electrical environment.
Nanotechnology / Nanomaterials
Mar 13, 2012 |
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Planck mission steps closer to the cosmic blueprint
(PhysOrg.com) -- ESA's Planck mission has revealed that our Galaxy contains previously undiscovered islands of cold gas and a mysterious haze of microwaves. These results give scientists new treasure to mine ...
Feb 13, 2012 |
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NASA shows off new algae farming technique for making biofuel
(Phys.org) -- NASA is clearly looking far into the future for a way to handle both human waste and a need for fuel on either long space flights or when attempting to colonize another planet. To that end, they’ve ...
Apr 16, 2012 |
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Carbonate
In chemistry, a carbonate is a salt of carbonic acid, characterized by the presence of the carbonate ion, CO2− 3. The name may also mean an ester of carbonic acid, an organic compound containing the carbonate group C(=O)(O–)2.
The term is also used as a verb, to describe carbonation: the process of raising the concentrations of carbonate and bicarbonate ions in water to produce carbonated water and other carbonated beverages — either by the addition of carbon dioxide gas under pressure, or by dissolving carbonate or bicarbonate salts into the water.
In geology and mineralogy, the term "carbonate" can refer both to carbonate minerals and carbonate rock (which is made of chiefly carbonate minerals), and both are dominated by the carbonate ion, CO2− 3. Carbonate minerals are extremely varied and ubiquitous in chemically-precipitated sedimentary rock. The most common are calcite or calcium carbonate, CaCO3, the chief constituent of limestone (as well as the main component of mollusc shells and coral skeletons); dolomite, a calcium-magnesium carbonate CaMg(CO3)2; and siderite, or iron (II) carbonate, FeCO3, an important iron ore. Sodium carbonate ("soda" or "natron") and potassium carbonate ("potash") have been used since antiquity for cleaning and preservation, as well as for the manufacture of glass. Carbonates are widely used in industry, e.g. in iron smelting, as a raw material for Portland cement and lime manufacture, in the composition of ceramic glazes, and more.
For more information about Carbonate, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
