Ytterbium metal ingot - one troy ounce - .999 bullion
Jean Charles Galissard de Marignac separated ytterbia from erbia in 1878 and named it after the nearby village of Ytterby, Sweden. It wasn't until 1907 that Georges Urbain, a French chemist separated ytterbia into ytterbium and lutetium and despite disputes over naming rights among other chemists from Austria and America who separated these two rare earths at about the same time, Marignac and Urbain were eventually credited by The Commission on Atomic Mass with the discoveries of ytterbium and lutetium respectively. It wasn't until ion exchange techniques were developed in the 1950s that pure samples of either were obtained and their true chemical and physical properties became known. Ytterbium has some unique properties relative to the other rare earth elements. It has paramagnetic and diamagnetic properties at different temperatures and in different allotropic forms. It has the smallest liquid range (670 °F) of all the metals. It also demonstrates varied electrical conductance of 10 times under different extrinsic pressures, alternating between a conductor and semiconductor. Ytterbium atomic clocks are the world's most stable. Most of its industrial use is as a dopant in the production of stainless steel to improve its properties. It's unique compression dependent conductive properties are used in stress sensors that monitor for earthquakes and explosions. It is also used in solid state lasers, x-ray machines, and in nuclear medicine. It slowly oxidizes in air and slowly dissolves in water. Worldwide annual production is about 50 tonnes. It along with the other rare earth metals sit atop the British Geologic Survey's Risk List.
Each ingot will be shipped with an assay certificate and with our velvet logo bag for storage. If you are not completely satisfied with any purchase from us, you have 30 days to return it for a full refund (buyer to pay return shipping). Domestic shipping is free for all orders over $199 (enter code free shipping at checkout). For orders of $199 or under, domestic shipping is $9.95. International shipping is now via USPS international priority express and costs $45 for shipments up to a pound (9 one ounce ingots or less including packaging materials) and $10 for each additional pound.