Browse "Chemistry"
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Radium
Radium (Ra) is a rare radioactive metal found with naturally occurring URANIUM (about 1 part radium to 3 million parts uranium). It was discovered in 1898 by Pierre and Marie Curie and G.
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Salt
Sodium chloride (NaCl), or common salt, is ubiquitous in the environment. In its solid form, salt crystallizes as colourless cubes and is called rock salt. Salt is also known to geologists as halite. Its crystal structure was the first to be determined by X-rays.
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Spodumene
Spodumene is a lithium aluminum silicate (8.0% Li2O, 27.4% Al2O3, 64.6%SiO2) and is the world's most common commercially mined lithium ore mineral. Petalite, lepidolite and amblygonite are also mined in different parts of the world.
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Synchrotron
A synchrotron is a source of brilliant light that acts like a giant microscope to allow matter to be seen at the atomic level. Synchrotron light is millions of times brighter than sunlight and millions of times more intense than conventional X-rays.
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Talc
Talc is a mineral composed of 31.7% magnesium oxide (MgO), 63.5% silicon dioxide (SiO2) and 4.8% water. It is formed by the alteration of dolomite or ultramafic IGNEOUS rocks. A formula for pure talc would look like this: 3 dolomite + 4 quartz + 1 water = 1 talc + 3 calcite + 3 CO2.
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Tantalum
Tantalum (Ta) is a grey, heavy, very hard metal with a high melting point. Tantalum is a chemical element with the chemical symbol Ta and atomic number 73. The name of this metal is derived from King Tantalus, a figure in Greek mythology. Due to its properties tantalum is used in the electronics industry.
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Thalidomide in Canada
The drug thalidomide was developed in Germany in the 1950s and was first available in Canada in 1959. It was originally prescribed as a sedative but was also given to pregnant women for nausea relief. By the end of 1962, however, thalidomide had been withdrawn from markets worldwide, following reports of babies born with severe birth defects. The tragic consequences led to changes in drug licensing and regulation in Canada and other countries, including the US and UK. More than 10,000 children around the world were born with deformities caused by thalidomide; many died within months of birth. In Canada, more than 100 children were born with congenital malformations caused by thalidomide. In the 21st century, thalidomide was approved by Health Canada for the treatment of leprosy, multiple myeloma, and some autoimmune diseases.
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Titanium
Titanium (Ti) is a metallic element estimated to form about 0.5% of the rocks of the Canadian SHIELD. Titanium minerals of commercial importance include the dioxides rutile and anatase, which are polymorphs of TiO2 and ilmenite (FeO.TiO2), a mineral that contains 52.7% TiO2.
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Tungsten
Tungsten (W), also called Wolfram, lapis ponderosus or Heavy Stone, is a silver-grey metallic element with the highest melting point of any metal (3410° C). Tungsten has a high density, high strength at elevated temperatures and extreme hardness.
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Uranium
Uranium oxide was first identified in 1789 by M.H. Klaproth in the MINERAL pitchblende, but its distinctive property of radioactivity was discovered much later (1896) by Henri Becquerel.
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