Terbium Elemental Symbol

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Terbium Terbium Terbio Térbio Terbio Terbium

Terbium Bohr ModelTerbium Element SymbolTerbium is a Block F, Group 3, Period 6 element. The number of electrons in each of Terbium's shells is 2, 8, 18, 27, 8, 2 and its electronic configuration is [Xe]4f9 6s2. The terbium atom has a radius of 177.pm and it's Van der Waals radius is 221.pm. In its elemental form, CAS 7440-27-9, terbium has a silvery-white appearance. Terbium was discovered and first isolated by Carl Gustaf Mosander in 1842. It is named after "Ytterby", the town in Sweden where it was discovered..

Elemental TerbiumTerbium is primarily used in phosphors, particularly in fluorescent lamps and as the high intensity green emitter used in projection televisions, such as the yttrium-aluminum-garnet (Tb:YAG) variety. Terbium responds efficiently in x-ray excitation and is, therefore, used as an x-ray phosphor. Terbium alloys are also used in magneto-optic recording films, such as Tb-Fe-Co. Terbium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity). Elemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. High Purity (99.999%) Terbium (Tb) Sputtering TargetTerbium nanoparticles and nanopowders provide ultra-high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits. Oxides are available in powder and dense pellet form for such uses as optical coating and thin film applications. Oxides tend to be insoluble. High Purity (99.999%) Terbium Oxide (Tb4O7) PowderFluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Terbium is also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.

Terbium is considered to be somewhat toxic. Safety data for Terbium and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the Products tab below.

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Terbium Properties

Symbol: Tb Melting Point: 1356 oC, 2472.8 oF, 1629.15 K 
Atomic Number: 65 Boiling Point: 3230 oC, 5846 oF, 3503.15 K
Atomic Weight: 158.93 Density: 8219 kg/m³
Element Category: Lanthanides Liquid Density @ Melting Point: 7.65 g·cm−3
Group, Period, Block: n/a, 6, f Specific Heat: 0.0437 Cal/g/K @ 25 °C
    Heat of Vaporization 70 K-Cal/gm atom at 3123 °C
CHEMICAL STRUCTURE Heat of Fusion 3.90 Cal/gm mole 
Electrons: 65 Thermal Conductivity: 0.111 W/cm/K @ 298.2 K
Protons: 65 Thermal Expansion: (r.t.) (α, poly) 10.3 µm/(m·K)
Neutrons: 94 Electrical Resistivity: (r.t.) (α, poly) 1.150 µΩ·m
Electron Configuration: [Xe] 4f96s2 Electronegativity: 1.2 Paulings
Atomic Radius: 177 pm Tensile Strength: 60 MPa
Covalent Radius: 194±5 pm Molar Heat Capacity: 28.91 J·mol−1·K−1
Van der Waals radius: 221 pm Young's Modulus: (α form) 55.7 GPa
Oxidation States: 4, 3, 2, 1 (weakly basic oxide) Shear Modulus: (α form) 22.1 GPa
Phase: Solid Bulk Modulus: (α form) 38.7 GPa
Crystal Structure: hexagonal close-packed Poisson Ratio: (α form) 0.261
Magnetic Ordering: paramagnetic Mohs Hardness: N/A
1st Ionization Energy: 565.77 kJ mol-1 Vickers Hardness: 863 MPa
2nd Ionization Energy: 1111.52 kJ mol-1 Brinell Hardness: 677 MPa
3rd Ionization Energy: 2114.01 kJ mol-1 Speed of Sound: (20 °C) 2620 m·s−1
CAS Number: 7440-27-9 Abundance in typical human body, by weight: N/A
ChemSpider ID: 22397 Abundance in typical human body, by atom: N/A
PubChem CID: 23958 Abundance in universe, by weight: N/A
MDL Number: MFCD00011256 Abundance in universe, by atom: N/A
EC Number: 231-137-6 Discovered By: Carl Gustaf Mosander
Beilstein Number: N/A Discovery Date: 1842
SMILES Identifier: [Tb]  
InChI Identifier: InChI=1S/Tb Other Names: Terbio, Térbio

Terbium Products

Metal Forms  •  Compounds  •  Alloys  •  Oxide Forms  •  Organometallic Compounds
Sputtering Targets  •  Nanomaterials  •  Semiconductor Materials

Recent Research & Development for Terbium

  • Jintai Lin, Yuhui Zheng, Qianming Wang, Conversion of Lewis acid-base interaction into readable emission outputs by novel terbium hybrid nanosphere, Dyes and Pigments, Volume 112, January 2015
  • Jinyuan Zhou, Dengfei Song, Hao Zhao, Xiaojun Pan, Zhenxing Zhang, Yanzhe Mao, Yujun Fu, Tao Wang, Erqing Xie, Microstructural and photoluminescent properties of terbium-doped SiC nanotubes prepared by sputtering using electrospun polymer templates, Journal of Luminescence, Volume 157, January 2015
  • Li Fu, Haiping Xia, Yanming Dong, Shanshan Li, Xuemei Gu, Jianli Zhang, Dongjie Wang, Haochuan Jiang, Baojiu Chen, Upconversion luminescence from terbium and ytterbium codoped LiYF4 single crystals, Journal of Alloys and Compounds, Volume 617, 25 December 2014
  • Youngku Sohn, Structural and spectroscopic characteristics of terbium hydroxide/oxide nanorods and plates, Ceramics International, Volume 40, Issue 9, Part A, November 2014
  • Qi Ma, Hailong Wang, Yanli Chen, Jianzhuang Jiang, Tetrakis(phthalocyaninato) terbium–cadmium quadruple-decker liquid crystals with good semiconducting properties, Organic Electronics, Volume 15, Issue 11, November 2014
  • Dmitry V. Lapaev, Victor G. Nikiforov, Georgy M. Safiullin, Vladimir S. Lobkov, Kev M. Salikhov, Andrey A. Knyazev, Yury G. Galyametdinov, Laser control and temperature switching of luminescence intensity in photostable transparent film based on terbium(III) ß-diketonate complex, Optical Materials, Available online 11 September 2014
  • Žaneta Dohnalová, Nataliia Gorodylova, Petra Šulcová, Milan Vlcek, Synthesis and characterization of terbium-doped SrSnO3 pigments, Ceramics International, Volume 40, Issue 8, Part B, September 2014
  • Duong Thi Mai Huong, Le Thi Trang, Le Van Vu, Nguyen Ngoc Long, Structural and optical properties of terbium doped lanthanum orthophosphate nanowires synthesized by hydrothermal method, Journal of Alloys and Compounds, Volume 602, 25 July 2014
  • N.K. Za'aba, M.A. Mohd Sarjidan, W.H. Abd. Majid, Eny Kusrini, Muhammad I. Saleh, Junction properties and conduction mechanism of new terbium complexes with triethylene glycol ligand for potential application in organic electronic device, Journal of Rare Earths, Volume 32, Issue 7, July 2014
  • Wei Sun, Jinzeng Wang, Houting Liu, Siyuan Chang, Xiaoting Qin, Zhiliang Liu, A luminescent terbium metal-organic framework for selective sensing of nitroaromatic compounds in high sensitivity, Materials Letters, Volume 126, 1 July 2014

Terbium Isotopes

Naturally occurring terbium (Tb) has one stable isotope: 159Tb

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
159Tb 158.9253468 Stable 3/2+