Taxonomy term

agi

Energy Notes: July 2012-2013

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
19 Nov 2013

Mineral Resource of the Month: Thallium

Thallium, a grayish-white metal similar to tin in appearance, was discovered spectroscopically in 1861. Like lead, it is heavy yet soft, and can be cut easily with a knife. When exposed to air, thallium’s luster quickly tarnishes to a blue-gray color owing to the formation of a film of thallium oxide. Its concentration in Earth’s crust is estimated at 0.7 parts per million; mostly it is found in association with potassium minerals in clays, soils and granites, but in general it is not commercially recoverable from those sources. Manganese nodules, found on the ocean floor, also contain thallium.

04 Nov 2013

Energy Notes: July 2012-2013

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

04 Nov 2013

Energy Notes: June 2012-2013

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
19 Oct 2013

Mineral Resource of the Month: Hafnium

Hafnium is a ductile metal with a brilliant silver luster. It does not exist as a free element in nature; it is always associated with zirconium. Its existence was predicted as early as 1869 by Dmitri Mendeleev, but it wasn’t discovered until 1923 when it was found in the mineral zircon by X-ray spectroscopic analysis. Hafnia is the Latin name for Copenhagen, the city where hafnium was discovered.

 
13 Oct 2013

Energy Notes: May 2012-2013

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
19 Sep 2013

Mineral Resource of the Month: Lithium

Lithium, the lightest of all metallic elements, has unique properties that have led to its use in a diverse array of applications. For many years, most lithium was used in the production of ceramics, glass and aluminum. More recently, the market for lithium has shifted toward batteries for consumer electronics and electric vehicles.

 
13 Sep 2013

Mineral Resource of the Month: Kyanite

Kyanite and the related minerals andalusite and sillimanite are anhydrous aluminum silicate polymorphs with the same chemical formula, but with different crystal structures and physical properties. These minerals form during metamorphism of clay-bearing sedimentary rocks or in pegmatites. In the United States, where kyanite is prevalent, these three minerals comprise the kyanite minerals group. It is also known as the “sillimanite group” where sillimanite is more common, particularly in India. The three minerals form under slightly different conditions and rarely occur together. They are composed of about 63 percent alumina and 37 percent silica. When “calcined,” or heated to 1,250 to 1,500 degrees Celsius, they convert to about 88 percent mullite and 12 percent silica (the percentages depend on grain size, impurities present and rate of temperature increase). 

 
13 Aug 2013

Energy Notes: March 2012-2013

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
19 Jul 2013

Energy Notes: April 2012-2013

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
19 Jul 2013

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