Erbium is a silvery white metal; Melting point 1529℃, boiling point 2863℃, density 9.006g/cm & amp； sup3； Erbium is antiferromagnetic at low temperature and ferromagnetic near absolute zero, so it is a superconductor. Erbium is slowly oxidized by air and water at room temperature, and erbium oxide is rosy. Erbium can be used as reactor control material; Erbium can also be used as an activator for some fluorescent materials. The first ionization energy is 6. 10 eV. The chemical and physical properties are almost the same as holmium and dysprosium. Silver gray metal, soft, insoluble in water, soluble in acid. Salts and oxides are pink to red. The isotopes of erbium are: 162Er, 164Er, 166Er, 167Er, 168Er, 170Er.

Element Name: Erbium

Element symbol: Er

English name: Er

Atomic weight of element: 167.3

Volume elastic modulus: Gpa:44.4

Enthalpy of atomization: kj/mol @ 25℃: 3 14.

Heat capacity: j/(mol k): 28.12.

Electrical conductivity:106/(cm ω): 0.0117.

Thermal conductivity: w/(m k):14.5

Heat of fusion: (kj/mol): 19.90

Heat of vaporization: (kj/mol): 26 1.0

Atomic volume: (cc/mol): 18.4

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Oxidation state: main Er+3

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Content of elements in the universe: (ppm): 0.002

Element content in the sun: (ppm):0.00 1+0.

Element content in seawater: (ppm): Atlantic surface layer 0.00059.

Content in the shell: (ppm): 3.8

Crystal structure: the unit cell is hexagonal.

Cell parameters:

a = 355.88 pm

b = 355.88 pm

c = 558.74 pm

α = 90

β = 90

γ = 120

Vickers hardness: 589 MPa

The speed of sound propagation in it: (m/s) 2830

Ionization energy (kJ/mol)

Male-male+588.7

M+ - M2+ 1 15 1

M2+ - M3+ 2 194

M3+ - M4+ 4 1 15

Element type: metal

Element symbol: Er

English name: Er

Chinese name: Er

Relative atomic mass: 167.2

Ordinary valence: +3

Electronegativity: 1.24

Peripheral electronic configuration: 4f 12 6s2

Extranuclear electron configuration: 2,8,18,30,8,2.

Electronic layer: K-L-M-N-O-P

Isotope and radiation: er-162 er-164 * er-166 er-167 er-168 er-169 [9.4d] er-/

Electron affinity energy and energy: 0 kj mol-1.

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The first ionization energy: 589 kj mol-1.

Secondary ionization energy:1151kj mol-1.

The third ionization energy: 0 kj mol-1.

Element density: 8.795g/cm3.

Melting point of single substance: 1522.0℃

Simple substance boiling point: 25 10.0℃

Atomic radius: 2.45a.

Ion radius:1.00 (+3) a.

* * * Price radius: 1.57 angstrom