Tantalum Elemental Symbol
Tantalum



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Tantale Tantal Tantalio Tântalo Tántalo Tantal

Tantalum(Ta) atomic and molecular weight, atomic number and elemental symbolTantalum is a Block D, Group 5, Period 6 element. The number of electrons in each of tantalum's shells is 2, 8, 18, 32, 11, 2 and its electron configuration is [Xe] 4f14 5d3 6s2. Tantalum Bohr ModelThe tantalum atom has a radius of 143.pm and its Van der Waals radius is 200.pm. In its elemental form, CAS 7440-25-7, tantalum has a gray blue appearance. High Purity (99.999%) Tantalum (Ta) MetalTantalum is found in the minerals tantalite, microlite, wodginite, euxenite, and polycrase. Tantalum was first discovered by Anders G. Ekeberg in 1802 in Uppsala, Sweden. Due to the close relation of tantalum to niobium in the periodic table, Tantalum's name originates from the Greek word Tantalos, meaning Father of Niobe in Greek mythology.

Tantalum has a number of interesting properties that make it particularly useful in electronic applications. It has the third highest melting point, surpassed only by rhenium and tungsten, yet it is highly conductive to heat and electricity. This has made it the material of choice for the electronic capacitors used in most telecommunications and hand held electronics equipment, such as cell phones, laptop computers and pagers.Tantalum compounds, such as the oxide and chloride, are the basis for di-electric coatings. High Purity (99.999%) Tantalum Oxide (Ta2O5) PowderTantalum is added to glass for its high refractive index. It also has various applications in nuclear energy. Tantalum 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%) Tantalum Sputtering Target Tantalum 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. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Tantalum is also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.

Tantalum is not toxic in its elemental form; however, safety data for Tantalum 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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Tantalum Properties


GENERAL PROPERTIES   PHYSICAL PROPERTIES  
Symbol: Ta Melting Point: 3290 K, 3017 °C, 5463 °F
Atomic Number: 73 Boiling Point: 5731 K, 5458 °C, 9856 °F
Atomic Weight: 180.94788 Density: 16.69 g·cm−3
Element Category: transition metal Liquid Density @ Melting Point: 15 g·cm−3
Group, Period, Block: 5, 6, d Specific Heat: 0.14 (kJ/kg K)
    Heat of Vaporization 758.22 kJ mol-1
CHEMICAL STRUCTURE Heat of Fusion 31.4 kJ mol-1
Electrons: 73 Thermal Conductivity: 57.5 W·m−1·K−1
Protons: 73 Thermal Expansion: (25 °C) 6.3 µm·m−1·K−1
Neutrons: 108 Electrical Resistivity: (20 °C) 131 nΩ·m
Electron Configuration: [Xe] 4f145d36s2 Electronegativity: 1.5 (Pauling scale)
Atomic Radius: 146 pm Tensile Strength: N/A
Covalent Radius: 170±8 pm Molar Heat Capacity: 25.36 J·mol−1·K−1
Van der Waals radius: 200.pm Young's Modulus: 186 GPa
Oxidation States: 5, 4, 3, 2, -1 (mildly acidic oxide) Shear Modulus: 69 GPa
Phase: Solid Bulk Modulus: 200 GPa
Crystal Structure: body-centered cubic Poisson Ratio: 0.34
Magnetic Ordering: paramagnetic Mohs Hardness: 6.5
1st Ionization Energy: 761 kJ·mol−1 Vickers Hardness: 873 MPa
2nd Ionization Energy: 1500 kJ·mol−1 Brinell Hardness: 800 MPa
3rd Ionization Energy: N/A Speed of Sound: (20 °C) 3400 m·s−1
       
IDENTIFIERS   MISCELLANEOUS  
CAS Number: 7440-25-7 Abundance in typical human body, by weight: N/A
ChemSpider ID: 22395 Abundance in typical human body, by atom: N/A
PubChem CID: 23956 Abundance in universe, by weight: 0.08 ppb
MDL Number: MFCD00011252 Abundance in universe, by atom: 0.0006 ppb
EC Number: 231-135-5 Discovered By: Anders Gustaf Ekeberg
Beilstein Number: N/A Discovery Date: 1802
SMILES Identifier: [Ta]  
InChI Identifier: InChI=1S/Ta Other Names: Tantale, Tantal, Tántalo
InChI Key: GUVRBAGPIYLISA-UHFFFAOYSA-N  
       
       
       
       
       

Tantalum Products

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

Compounds

Ammonium Heptafluorotantalate(V)
Barium Tantalum Oxide
Magnesium Tantalate
PZT (Lead Zirconate Titanate)
Potassium Heptafluorotantalate
Potassium Tantalum Niobium Oxide
Potassium Tantalum Oxide
Rubidium Tantalate
Tantalum Acetate Solution
Tantalum Aluminide
Tantalum Boride TaB
Tantalum Boride TaB2
Tantalum(III) Bromide TaBr3
Tantalum(V) Bromide TaBr5
Tantalum Carbide TaC
Tantalum Carbide Ta2C
Tantalum Carbide Foam
Tantalum Carbide Honeycomb
Tantalum Carbide Powder
Tantalum Carbide Sponge
Tantalum Carbide Wool
Tantalum(V) Chloride
Tantalum Chloride Solution
Tantalum Fluoride TaF3
Tantalum(V) Fluoride TaF5
Tantalum Hafnium Carbide
Tantalum(IV) Iodide TaI4
Tantalum(V) Iodide TaI5
Tantalum Hafnium Carbide
Tantalum Hydride
Tantalum Niobium Carbide
Tantalum Nitrate
Tantalum Nitride
Tantalum Oxide
Tantalum Silicide TaSi2
Tantalum Silicide Ta5Si3
Tantalum Trichloride


Sputtering Targets

Aluminum Magnesium Copper Sputtering Target
Aluminum Tantalum Sputtering Target
Chromium Molybdenum Tantalum Sputtering Target
Cobalt Chromium Tantalum Boron Sputtering Target
Tantalum Aluminum Sputtering Target
Tantalum Carbide Sputtering Target
Tantalum Molybdenum Sputtering Target
Tantalum Nitride Sputtering Target
Tantalum Oxide Rotatable Sputtering Target
Tantalum Oxide Sputtering Target
Tantalum Phosphide Sputtering Target
Tantalum Rotatable Sputtering Target
Tantalum Selenide Sputtering Target
Tantalum Silicide Sputtering Target
Tantalum Sputtering Target
Tantalum Telluride Sputtering Target


Oxide Forms

Tantalum Oxide Nanopowder
Tantalum Oxide Particles
Tantalum Oxide Pellets
Tantalum Oxide Pieces
Tantalum Oxide Powder
Tantalum Oxide Rotatable Sputtering Target
Tantalum Oxide Shot
Tantalum Oxide Sputtering Target
Tantalum Oxide Tablets


Recent Research & Development for Tantalum

  • Alkyl chlorido hydridotris(3,5-dimethylpyrazolyl)borate imido niobium and tantalum(v) complexes: synthesis, conformational states of alkyl groups in solid and solution, X-ray diffraction and multinuclear magnetic resonance spectroscopy studies. Galájov M, García C, Gómez M, Gómez-Sal P. Dalton Trans. 2014.
  • Corrosion behavior of tantalum-coated cobalt-chromium modular necks compared to titanium modular necks in a simulator test. Dorn U, Neumann D, Frank M. J Arthroplasty. 2014.
  • Tantalum coating on TiO2 nanotubes induces superior rate of matrix mineralization and osteofunctionality in human osteoblasts. Frandsen CJ, Brammer KS, Noh K, Johnston G, Jin S. Mater Sci Eng C Mater Biol Appl. 2014
  • Design of porous silica supported tantalum oxide hollow spheres showing enhanced photocatalytic activity. Sharma M, Das D, Baruah A, Jain A, Ganguli AK. Langmuir. 2014.
  • Uncemented porous tantalum acetabular components: early follow-up and failures in 613 primary total hip arthroplasties. Noiseux NO, Long WJ, Mabry TM, Hanssen AD, Lewallen DG. J Arthroplasty. 2014.
  • Separation of no-carrier-added rhenium from bulk tantalum by the sodium malonate-PEG aqueous biphasic system. Dutta B, Lahiri S, Tomar BS. Appl Radiat Isot. 2014 Feb.
  • Alkyl chlorido hydridotris(3,5-dimethylpyrazolyl)borate imido niobium and tantalum(v) complexes: synthesis, conformational states of alkyl groups in solid and solution, X-ray diffraction and multinuclear magnetic resonance spectroscopy studies. Galájov M, García C, Gómez M, Gómez-Sal P. Dalton Trans. 2014
  • Tantalum oxide honeycomb architectures for the development of a non-enzymatic glucose sensor with wide detection range. Suneesh PV, Chandhini K, Ramachandran T, Nair BG, Satheesh Babu TG. Biosens Bioelectron. 2013 Dec.
  • New azido-substituted tantalum compounds: syntheses and DFT examination of nitrogen-rich mono-, di-, and trinuclear tantalum(v) compounds. Huang SH, Nesterov VN, Richmond MG. Dalton Trans. 2014 Feb.
  • Method of low tantalum amounts determination in niobium and its compounds by ICP-OES technique. Smolik M, Turkowska M. Talanta. 2013 Oct.
  • Strontium adsorption on tantalum-doped hexagonal tungsten oxide. Li X, Mu W, Xie X, Liu B, Tang H, Zhou G, Wei H, Jian Y, Luo S. J Hazard Mater. 2014 Jan.
  • New azido-substituted tantalum compounds: syntheses and DFT examination of nitrogen-rich mono-, di-, and trinuclear tantalum(v) compounds. Huang SH, Nesterov VN, Richmond MG. Dalton Trans. 2014 Jan.
  • Formation of Methyl Radicals from Decomposition of Methyl-Substituted Silanes over Tungsten and Tantalum Filament Surfaces. Toukabri R, Alkadhi N, Shi YJ. J Phys Chem A. 2013 Aug.
  • Laser ablation ignition of premixed methane and oxygen-enriched air mixtures using a tantalum target. Li X, Yu X, Fan R, Yu Y, Liu C, Chen D. Opt Lett. 2014 Jan.
  • Acetabular revision in THA using tantalum augments combined with impaction bone grafting. Gehrke T, Bangert Y, Schwantes B, Gebauer M, Kendoff D. Hip Int. 2013 Sep.
  • Long-Lived Radical Cation Salts Obtained by Interaction of Monocyclic Arenes with Niobium and Tantalum Pentahalides at Room Temperature: EPR and DFT Studies. Marchetti F, Pampaloni G, Pinzino C. Chemistry. 2013 Aug.
  • Uncemented Porous Tantalum Acetabular Components: Early Follow-Up and Failures in 613 Primary Total Hip Arthroplasties. Noiseux NO, Long WJ, Mabry TM, Hanssen AD, Lewallen DG. J Arthroplasty. 2013.
  • Bone Ingrowth and Initial Stability of Titanium and Porous Tantalum Dental Implants: A Pilot Canine Study. Kim DG, Huja SS, Tee BC, Larsen PE, Kennedy KS, Chien HH, Lee JW, Wen HB. Implant Dent. 2013 Aug.
  • Phosphoramidate tantalum complexes for room-temperature c?h functionalization: hydroaminoalkylation catalysis. Garcia P, Lau YY, Perry MR, Schafer LL. Angew Chem Int Ed Engl. 2013 Aug.
  • Sol-gel synthesis of tantalum oxide and phosphonic acid-modified carbon nanotubes composite coatings on titanium surfaces. Maho A, Detriche S, Delhalle J, Mekhalif Z. Mater Sci Eng C Mater Biol Appl. 2013.

Tantalum Isotopes


Naturally occuring tantalum (Ta) has two stable isotopes: 180Ta (0.012%) and 181Ta (99.988%).

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
180Ta 179.9474648 Observationally Stable 9-
181Ta 180.9479958 Observationally Stable 7/2+