Properties

CAS Number7440-19-9
PubChem CID23951
Atomic Radius180
Atomic Volume20
Atomic Weight150.36
Blockf
Boiling Point1,794
Bulk Modulus
CategoryLanthanides
Crystal StructureSimple Trigonal
ColorSilver
Covalent Radius198
Density7.52
Electrical Resistivity
Electron Configuration[Xe] 4f6 6s2
Electrons per shell2, 8, 18, 24, 8, 2
Electronegativity1.17
Electrons62
Groupna
Heat of Fusion8.6
Heat of Vaporization175
Ionization Potential5.644
Magnetic Ordering
Magnetic Susceptibility
Mass150.36
Mass Number62
Melting Point1,072
NameSamarium
Neutrons88
Atomic Number150
Oxidation States2, 3
Period6
PhaseSolid
Poisson Ratio
Protons62
Shear Modulus
Specific Heat Capacity0.197
SymbolSm
Thermal Conductivity0.133
Van der Waals radius
Young's Modulus
Abundance
Abundance in Earth's crust0.0006%
Abundance in Universe5×10-7%
Sm Samarium 62 150.36 6 f 62 1074.0 1794.0 [Xe] 4f6 6s2 2 8 18 24 8 2 7.52 0.0006% Silver Rhombohedral 1.2 {"1":"544.5","2":"1070","3":"2260","4":"3990"} 545 50 +3,2 1.81 19.9 11.09 191.63 0.197 13.3 106.K 0 Solid, Paramagnetic, Conductor, Lanthanide, Stable, Natural seh-MER-i-em Silvery rare earth metal. It is used in the electronics and ceramics industries. It is easily magnetized and very difficult to demagnetize. This suggests important future applications in solid-state and superconductor technologies. Found with other rare earths in monazite sand. The sand is often 50% rare earths by weight and 2.8% samarium. LpTkBg8HpvY Samarium
Ferdinand Reich and Hieronymous Theodor Richter first identified indium in sphalerite by its bright indigo-blue spectroscopic emission line.

As no element was known with a bright blue emission they concluded that a new element was present in the minerals.

Richter went on to isolate the metal in 1864. From the brilliant indigo line in its spectrum 62 1879 Paul Emile Lecoq de Boisbaudran France Named after "Samarskite" (a mineral)

Isotopes of Indium

Standard Atomic Weight

150.36(2)

Stable Isotopes

144Sm 147Sm 148Sm 149Sm 150Sm 152Sm 154Sm

Unstable Isotopes

128Sm 129Sm 130Sm 131Sm 132Sm 133Sm 134Sm 135Sm 136Sm 137Sm 138Sm 139Sm 140Sm 141Sm 142Sm 143Sm 145Sm 146Sm 151Sm 153Sm 155Sm 156Sm 157Sm 158Sm 159Sm 160Sm 161Sm 162Sm 163Sm 164Sm 165Sm

Indium is considered to be of low toxicity
When it is bent, indium emits a high-pitched 'cry'
Indium's current primary application is to form transparent electrodes from indium tin oxide in liquid crystal displays and touchscreens.

It is widely used in thin-films to form lubricated layers.

It is also used for making particularly low melting point alloys, and is a component in some lead-free solders.