These include iron ore (magnetite or lodestone), cobalt and nickel, as well as the rare earth metals gadolinium and dysprosium (when at a very low temperature).
en.wikipedia.org While these compounds do exist, analogous chemicals that contain lanthanum, praseodymium, gadolinium, holmium, terbium, or ytterbium have not been discovered, as of 2008.
en.wikipedia.org This leads to a signal increase which can be visualised with the late gadolinium enhancement technique.
en.wikipedia.org There have been concerns raised recently regarding the toxicity of gadolinium-based contrast agents and their impact on persons with impaired kidney function.
en.wikipedia.org Elsewhere, smartphone screens are also made up of extremely rare elements called praseodymium, gadolinium and terbium.
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