CAS Number7440-36-0
PubChem CID5354495
Atomic Radius140
Atomic Volume18.22
Atomic Weight121.76
Boiling Point1,587
Bulk Modulus
Crystal StructureSimple Trigonal
Covalent Radius139
Electrical Resistivity
Electron Configuration[Kr] 4d10 5s2 5p3
Electrons per shell2, 8, 18, 18, 5
Heat of Fusion19.7
Heat of Vaporization68
Ionization Potential8.608
Magnetic Ordering
Magnetic Susceptibility
Mass Number51
Melting Point630.63
Atomic Number122
Oxidation States-3, 3, 5
Poisson Ratio
Shear Modulus
Specific Heat Capacity0.207
Thermal Conductivity0.243
Van der Waals radius
Young's Modulus
Abundance in Earth's crust0.00002%
Abundance in Universe4×10-8%
Sb Antimony 51 121.76 15 5 p 51 631.0 1950.0 [Kr] 4d10 5s2 5p3 2 8 18 18 5 6.69 0.00002% Silver Rhombohedral 2.1 1.984 {"1":"834","2":"1594.9","3":"2440","4":"4260","5":"5400","6":"10400"} 834 103.2 138 +3,5 1.59 18.4 19.83 67.97 0.207 24.3 0 Solid, Diamagnetic, Conductor, Metal, Stable, Natural, Metalloid AN-teh-MOH-ni Hard, brittle, silvery-white semimetal. It is alloyed with other metals to increase their hardness. Also in the manufacture of a few special types of semiconductor devices. Also in plastics and chemicals. A few kinds of over-the-counter cold and flu remedies use antimony compounds. Found in stibnite (Sb2S3) and in valentinite (Sb2O3). kcc6qNT3BoU Antimony
In 1787, Carl Axel Arrhenius found a new mineral near Ytterby in Sweden and named it ytterbite, after the village.

Johan Gadolin discovered yttrium's oxide in Arrhenius' sample in 1789, and Anders Gustaf Ekeberg named the new oxide yttria.

Elemental yttrium was first isolated in 1828 by Friedrich Wöhler. Named after Ytterby, a village in Sweden near Vauxholm 51 From the Greek words "anti + monos" meaning "not alone" (the origin of the symbol Sb comes from the Latin word "stibium")

Isotopes of Yttrium

Standard Atomic Weight


Stable Isotopes

121Sb 123Sb

Unstable Isotopes

103Sb 104Sb 105Sb 106Sb 107Sb 108Sb 109Sb 110Sb 111Sb 112Sb 113Sb 114Sb 115Sb 116Sb 117Sb 118Sb 119Sb 120Sb 122Sb 124Sb 125Sb 126Sb 127Sb 128Sb 129Sb 130Sb 131Sb 132Sb 133Sb 134Sb 135Sb 136Sb 137Sb 138Sb 139Sb

Exposure to yttrium compounds in humans may cause lung disease
Finely divided yttrium is very unstable in air
Yttrium is often used in alloys, increasing the strength of aluminum and magnesium alloys.

Yttrium is one of the elements used to make the red color in CRT televisions.

It is also used as a deoxidizer for non-ferrous metals such as vanadium.

Yttrium can be used in laser systems and as a catalyst for ethylene polymerization reactions.