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  2. Gadolinium - Wikipedia

    en.wikipedia.org/wiki/Gadolinium

    Gadolinium is a chemical element; it has symbol Gd and atomic number 64. Gadolinium is a silvery-white metal when oxidation is removed. It is a malleable and ductile rare-earth element. Gadolinium reacts with atmospheric oxygen or moisture slowly to form a black coating. Gadolinium below its Curie point of 20 °C (68 °F) is ferromagnetic, with ...

  3. MRI contrast agent - Wikipedia

    en.wikipedia.org/wiki/MRI_contrast_agent

    Gadolinium (III) containing MRI contrast agents (often termed simply "gado" or "gad") are the most commonly used for enhancement of vessels in MR angiography or for brain tumor enhancement associated with the degradation of the blood–brain barrier (BBB). [3][4] Over 450 million doses have been administered worldwide from 1988 to 2017. [5]

  4. Isotopes of gadolinium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_gadolinium

    Isotopes of gadolinium (64Gd) Naturally occurring gadolinium (64 Gd) is composed of 6 stable isotopes, 154 Gd, 155 Gd, 156 Gd, 157 Gd, 158 Gd and 160 Gd, and 1 radioisotope, 152 Gd, with 158 Gd being the most abundant (24.84% natural abundance). The predicted double beta decay of 160 Gd has never been observed; only a lower limit on its half ...

  5. Gadolinium(III) oxide - Wikipedia

    en.wikipedia.org/wiki/Gadolinium(III)_oxide

    Nanoparticles of gadolinium oxide is a potential contrast agent for magnetic resonance imaging (MRI). A dextran-coated preparation of 20–40 nm sized gadolinium oxide particles had a relaxivity of 4.8 s −1 mM −1 per gadolinium ion at 7.05 T (an unusually high field compared to the clinically used MRI scanners which mostly range from 0.5 to ...

  6. Gadolinium (III) selenate - Wikipedia

    en.wikipedia.org/wiki/Gadolinium(III)_selenate

    Gadolinium(III) selenate is an inorganic compound with the chemical formula Gd 2 (SeO 4) 3. It exists as the anhydrate and octahydrate. The octahydrate transforms into the anhydrate when heated to 130 °C. Preparation. Gadolinium(III) selenate can be obtained by crystallizing from the reaction of gadolinium oxide and selenic acid solution:

  7. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    A comprehensive Wikipedia data page detailing the hardness levels of various elements.

  8. Palladium - Wikipedia

    en.wikipedia.org/wiki/Palladium

    Prior to 2004, the principal use of palladium in jewelry was the manufacture of white gold. Palladium is one of the three most popular alloying metals in white gold (nickel and silver can also be used). [38] Palladium-gold is more expensive than nickel-gold, but seldom causes allergic reactions (though certain cross-allergies with nickel may ...

  9. Doré bar - Wikipedia

    en.wikipedia.org/wiki/Doré_bar

    Doré bar. A doré bar is a semi-pure alloy of gold and silver. It is usually created at the site of a mine and then transported to a refinery for further purification. The proportions of silver and gold can vary widely. Doré bars weigh as much as 25 kg. During the 19th century gold rushes, gold nuggets and dust were melted into crude gold ...

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