Investor Profile of Rhenium

Investor Profile of Rhenium - Rhenium Son Of Moly Features...

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1/22/11 7:00 PM Rhenium: Son Of Moly - Features and Interviews - Hard Assets Investor Page 1 of 7 http://www.hardassetsinvestor.com/component/content/article/1002.html?tmpl=component&print=1&page= Rhenium: Son Of Moly Written by Tom Vulcan August 05, 2008 12:00 am EDT Back in 1870, had you scanned the periodic table below to find rhenium, you wouldn't have found it - it wasn't there. There were still gaps for predicted, but-as-yet-undiscovered, elements, and one of them was waiting for rhenium. The Periodic Table In fact the element (atomic number 75), was only discovered some 55 years later, in 1925, by a team of German scientists: Otto Berg, Walter Noddack and Ida Tacke. They subsequently named rhenium after the river Rhine. Indeed, rhenium was one of the two last naturally occurring chemical elements to be discovered. One of the reasons is that it occurs neither freely in nature nor as a compound in a distinct mineral species. Once it has been extracted, however, rhenium is a heavy, silvery white metal. Son Of Moly Rhenium is the "Son of Moly" for a couple of reasons. Not only is most rhenium today produced as a by-product of the copper and molybdenum mining industries, but like molybdenum, rhenium has some very special, if not unique, properties. Like moly, also, there's not much of it around. In fact, there's considerably less rhenium than there is moly. In the Earth's crust, it is only to be found in single-digit parts in a billion. Only about 50 metric tonnes of it are produced each year, and total world reserves of the metal are probably not much more than 10,000 metric tonnes.
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1/22/11 7:00 PM Rhenium: Son Of Moly - Features and Interviews - Hard Assets Investor Page 2 of 7 http://www.hardassetsinvestor.com/component/content/article/1002.html?tmpl=component&print=1&page= Characteristics Why is rhenium so special? Here are just some of the reasons: Extraordinarily high melting point : Around 3,180 ºC, a melting point exceeded only by tungsten and carbon. It is, therefore, a refractory metal (extremely resistant to heat and wear), but the only such metal not to form carbides. Extremely dense : A density exceeded only by iridium, osmium and platinum. No ductile-to-brittle transition temperature : It remains ductile (i.e., malleable or being able to be deformed plastically without fracturing) from Absolute Zero (-273.15 ºC) to its melting point. A unique property. High modulus of elasticity : Extremely stable and rigid under stress (great tensile strength), rhenium has the third-highest modulus of elasticity of any metal. High electrical resistivity : This is true; however, rhenium-molybdenum alloys actually become super-conducting at 10 ºK (-263.15 ºC). Low friction High resistance to creep : i.e., the tendency to move slowly or deform permanently when under stress. Exceptionally resistant to chemical poisoning : Rhenium is particularly resistant to poisoning from nitrogen, sulfur and phosphorus and can be used very effectively for the hydrogenation (the addition of hydrogen - H 2 ) of fine chemicals.
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