Gadolinium metal ingot - one troy ounce - .995 bullion
Named after gadolinite, one of the minerals which contains gadolinium among other rare earth elements by the Finnish chemist Johan Gadolin in 1800, gadolinium was first detected spectroscopically in 1880 by Jean Charles Galissard de Marignac who was credited with the discovery of this element. Very small amounts of gadolinium are used in metallurgy to improve the physical and chemical characteristics of other metals including iron and chromium. It has a very high affinity for thermal neutrons. It is ferromagnetic at temperatures below its Curie point of 68 °F and above this temperature is strongly paramagnetic. It along with praseodymium has a magnetocaloric effect causing it to increase in temperature upon entering a magnetic field and decrease in temperature upon leaving one. These properties have allow for specialized industrial applications in metallurgy, MRI, X-ray, and PET imaging, nuclear reactors, solid state laser systems, and solid oxide fuel cells. Its magnetocaloric property may allow for magnetic refrigeration systems in the future. Worldwide annual production is about 400 tonnes per year. It along with the other rare earth metals sit atop the British Geologic Survey's Risk List. We had fun with a recent article about the rising gadolinium levels in San Francisco Bay. The link is included below.
Each ingot will be shipped with an assay certificate and every shipment will include our velvet logo bag. 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 $99 (enter code free shipping at checkout). For orders of $99 or under, domestic shipping is $9.95. International shipping is via DHL, FedEx, or USPS international 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.