Y occurs as chemical element in the periodic table that has the symbol Y & atomic number 39. The silvery metal transition metal, yttrium is green inside rare-earth minerals and deuce of its compounds come utilized to produce a red colourise color televisions.

Notable Characteristics
Atomic number 39 occurs as silver-metallic, lustrous uncommon globe metal that is relatively stable within air & chemically resembles a lanthanides. Shavings or even turnings of the metal can ignite inside air while it exceed 400 °C. While y is finely divided these are super unstable around air. the metal has a moo cross division for nuclear capture. A most common oxidation state of yttrium is +3.

Applications
Atomic number 39 oxide is the first y compound & is widely wont to produce YVO₄ europium and Y₂O_Trey atomic number 63 phosphors that give a red colorise color television picture tubes. More utilizes;

Yttrium oxide is besides wont to produce yttrium-iron-garnets which are super effectual microwave filters. Yttrium iron, aluminium, and gadolinium garnets (e.g. Y_TernionFe_FiveO_Xii & Y_TierceAl_QuintO_Twelve) use interesting magnetic properties. Atomic number 39 cast-iron garnet is very effective as an acoustical energy transmitter & transducer. Atomic number 39 al garnet has the hardness of Octad.V & is likewise utilized as a gemstone (simulated diamond). Small numbers of the element (Cipher.1 to 0.2%) use at times been utilized to reduce grain size of chromium, molybdenum, titanium, and zirconium. These are likewise wont to increase a nature & severity of atomic number 13 and magnesium alloys. Used as a catalyst for ethylene polymerization. atomic number 39 aluminum garnet, atomic number 39 li fluoride, & yttrium vanadate come utilized around combination using dopants like neodymium or erbium in infrared lasers. This metal may be utilized to deoxidize vanadium and other nonferrous metals. Yttrium is likewise utilized in the manufacture of gas mantles for propane lanterns. Cerium-doped atomic number 39 aluminum garnet (YAG:Ce) crystals come utilized to produce blue LEDs. Yttrium was utilized as a "secret" element inside a superconductor developed at the University of Houston. This superconductor operated above 90K, an amazing deed because it potty work at above liquid nitrogen's boiling point. (Y_Unity.TwoBa_Nought.OctadCuO_Quadruplet). the matter created was a multi-crystal multi-phase mineral, of which were black & green. Y has been exposed for imaginable utilise as a nodulizer in the making of noduled cast iron which has increased ductility (the graphite forms compact nodules instead of flakes to form noduled cast iron). Possibly, y may be utilized within ceramic and glass formulas, since yttrium oxide has the high melting point & imparts shock resistance and moo expansion characteristics to glass.

History
Y (known as for Ytterby, a Swedish village touching 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 (Y_TwoO_Troika) is the oxide of atomic number 39 & was found by Johan Gadolinside in 1794 in a gadolinite mineral from Ytterby.

Within 1843 Carl Mosander was able to show that yttria can be divided into a oxides (or even earths) of trey different elements. "Yttria" was a title utilized for the virtually all basic one & the others were known as erbia and terbia.

the quarry is placed touching the village of Ytterby (a village around Sweden touching Vauxholm) that yielded numerous unusual minerals that contained rare earths and more elements. A elements erbium, terbium, and ytterbium, and y keep close at hand whole been known as fallowing this equivalent town.

Occurrence
This element is incurred around nigh tons rare earth minerals and within uranium ores but is never detected inside nature and severity as a loose element. Atomic number 39 is commercially recovered from either monazite sand (3% content, [(Ce, La, etc.)PO₄]) and from bastnasite (0.2% content, [(Ce, La, etc.)(CO₃)F]). These are commercially by reducing y fluoride with calcium metal but it can besides become produced applying more techniques. These are hard to separate from either more uncommon earths & once extracted, occurs as dark gray powder.

Lunar rock samples from either a Apollo program have a relatively high y content.

Isotopes
Natural y is composed of sole 1 isotope (Y-89). A virtually all stable radioisotopes are Y-88 which has a half life of 106.65 days & Y-91 sustaining the half life of 58.51 years. All the more isotopes develop half lifes of to the lesser degree the day except Y-87 which has a half life of 79.Eighter hours. A dominant decay mode below the stable Y-89 is electron capture and the dominant mode when these are beta emission. Twenty six unstable isotopes develop been characterized.

Y-90 lives inside equilibrium by having its parent isotope strontium-90, which is a product of nuclear explosions.

Precautions
Compounds that contain this element come seldom found by virtually all population however should become considered to exist as extremely toxic possibly though numbers of compounds pose little chance. Atomic number 39 salts can be carcinogenic. This element is non unremarkably obtained within man tissue & plays there are no known biological role.