Yttrium - Occurrence

Yttrium is a chemical element in the periodic table that has the symbol Y and atomic number 39. A silvery metallic transition metal, yttrium is common in rare-earth minerals and two of its compounds are used to make the red color in color televisions. Yttrium - Notable Characteristics. Yttrium is a silver-metallic, lustrous rare earth metal that is relatively stable in air and chemically resembles the lanthanides. Shavings or turnings of the metal can ignite in air when they exceed 400 °C. When yttr ...

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• Yttrium - Notable Characteristics
• Yttrium - Applications
• Yttrium - History
• Yttrium - Occurrence
• Yttrium - Isotopes
• Yttrium - Precautions

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This element is found in almost all rare earth minerals and in uranium ores but is never found in nature as a free element. Yttrium is commercially recovered from monazite sand (3% content, [(Ce, La, etc.)PO4]) and from bastnasite (0.2% content, [(Ce, La, etc.)(CO3)F]). It is commercially produced by reducing yttrium fluoride with calcium metal but it can also be produced using other techniques. It is difficult to separate from other rare earths and when extracted, is a dark gray powder. Lunar rock samples from the Apollo program h ...

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Yttrium, Yttrium - Notable Characteristics, Yttrium - Applications, Yttrium - History, Yttrium - Occurrence, Yttrium - Isotopes, Yttrium - Precautions

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Yttrium(III) oxide is the most important yttrium compound and is widely used to make YVO4 europium and Y2O3 europium phosphors that give the red color in color television picture tubes. Other uses; Yttrium oxide is also used to make yttrium-iron garnets which are very effective microwave filters. Yttrium iron, aluminium, and gadolinium garnets (e.g. Y3Fe5O12 and Y3Al5O12) have interesting magnetic properties. Yttrium iron ...

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Yttrium, Yttrium - Notable Characteristics, Yttrium - Applications, Yttrium - History, Yttrium - Occurrence, Yttrium - Isotopes, Yttrium - Precautions

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Yttrium (named for Ytterby, a Swedish village near Vaxholm) was discovered by Johan Gadolin in 1794 and isolated by Friedrich Wohler in 1828 as an impure extract of yttria through the reduction of yttrium anhydrous chloride (YCl3) with potassium. Yttria (Y2O3) is the oxide of yttrium and was discovered by Johan Gadolin in 1794 in a gadolinite mineral from Ytterby. In 1843 Carl Mosander was able to show that yttria could be divided into the oxides (or earths) of three different elements. "Yttria" was the name used for the most basic one and the ...

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Yttrium, Yttrium - Notable Characteristics, Yttrium - Applications, Yttrium - History, Yttrium - Occurrence, Yttrium - Isotopes, Yttrium - Precautions

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Natural yttrium is composed of only one isotope (Y-89). The most stable radioisotopes are Y-88 which has a half life of 106.65 days and Y-91 with a half life of 58.51 days. All the other isotopes have half lifes of less than a day except Y-87 which has a half life of 79.8 hours. The dominant decay mode below the stable Y-89 is electron capture and the dominant mode after it is beta emission. Twenty six unstable isotopes have been characterized. Y-90 exists in equilibrium with its parent isotope strontium-90, which ...

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Yttrium, Yttrium - Notable Characteristics, Yttrium - Applications, Yttrium - History, Yttrium - Occurrence, Yttrium - Isotopes, Yttrium - Precautions

Read more here: » Yttrium: Encyclopedia II - Yttrium - Isotopes