Strontium Elemental Symbol

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Strontium Strontium Stronzio Estrôncio Estroncio Strontium

Strontium(Sr) atomic and molecular weight, atomic number and elemental symbolStrontium is a Block S, Group 2, Period 5 element. Elemental StrontiumThe number of electrons in each of Strontium's shells is 2, 8, 18, 8, 2 and its electron configuration is [Kr] 5s2. Strontium Bohr ModelThe strontium atom has a radius of and its Van der Waals radius is In its elemental form, CAS 7440-24-6, strontium has a silvery white metallic appearance. Strontium is found in celestite and strontianite ores. Strontium was discovered by William Cruickshank in 1787 and first isolated by Humphry Davy in 1808. Strontium was named after the Scottish town it was discovered in.

Strontium has low tech applications as an additive to flares and pyrotechnics because of the bright crimson flame produced by its salts. It also has many high technology applications because of its high refractive index as a titanate in glass, as a "getter" in electron tubes and as a dopant for numerous perovskite formulations to produce cathodes for oxygen generation or solid oxide fuel cells. Historically the primary use of strontium has been to produce CRT glass for color televisions and computer monitors. High Purity (99.999%) Strontium (Sr) Sputtering TargetStrontium 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%) Strontium Oxide (SrO)PowderStrontium 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. Strontium is also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.

The non-radioactive isotopes of Strontium are not toxic. Safety data for Strontium 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.

  • Properties
  • Safety Data
  • Products
  • Research
  • Isotopes
  • Other Elements

Strontium Properties

Symbol: Sr Melting Point: 777 oC, 1430.6 oF, 1050.15 K
Atomic Number: 38 Boiling Point: 1377 oC, 2510.6 oF, 1650.15 K
Atomic Weight: 87.62 Density: 2.54 gm/cc
Element Category: alkaline earth metal Liquid Density @ Melting Point: 2.375 g·cm−3
Group, Period, Block: 2, 5, s Specific Heat: 0.0719Cal/g/K @ 25°C
    Heat of Vaporization 154.4 kJ mol-1
CHEMICAL STRUCTURE Heat of Fusion 9.16 kJ mol-1
Electrons: 38 Thermal Conductivity: 0.354W/cm/K @ 298.2 K
Protons: 38 Thermal Expansion: (25 °C) 22.5 µm·m−1·K−1
Neutrons: 50 Electrical Resistivity: 23.0 microhm-cm @ 20
Electron Configuration: [Kr]5s2 Electronegativity: 1.0 Paulings
Atomic Radius: 215 pm Tensile Strength: N/A
Covalent Radius: 195±10 pm Molar Heat Capacity: 26.4 J·mol−1·K−1
Van der Waals radius: 249 pm Young's Modulus: 15.7 GPa
Oxidation States: 2, 1 (strongly basic oxide) Shear Modulus: 6.03 GPa
Phase: Solid Bulk Modulus: N/A
Crystal Structure: face-centered cubic Poisson Ratio: 0.28
Magnetic Ordering: paramagnetic Mohs Hardness: 1.5
1st Ionization Energy: 549.48 kJ mol-1 Vickers Hardness: N/A
2nd Ionization Energy: 1064.25 kJ mol-1 Brinell Hardness: N/A
3rd Ionization Energy: 4138.29 kJ mol-1 Speed of Sound: N/A
CAS Number: 7440-24-6 Abundance in typical human body, by weight: 4600 ppb
ChemSpider ID: 4514263 Abundance in typical human body, by atom: 330 ppb
PubChem CID: 5359327 Abundance in universe, by weight: 40 ppb
MDL Number: MFCD00134060 Abundance in universe, by atom: 0.06 ppb
EC Number: 231-133-4 Discovered By: William Cruickshank
Beilstein Number: N/A Discovery Date: 1787
SMILES Identifier: [SrH2]  
InChI Identifier: InChI=1S/Sr Other Names: Stronzio, Estrôncio

Strontium Products

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


Lanthanum Strontium Chromite (LSC)
Lanthanum Strontium Cobalt Chromite
Lanthanum Strontium Cobalt Chromite Paste
Lanthanum Strontium Cobalt Ferrite (LSCF)
Lanthanum Strontium Cobalt Ferrite Paste
Lanthanum Strontium Ferrite (LSF)
Lanthanum Gallate, Strontium and Magnesium-Doped (LSGM)
Lanthanum Strontium Manganite (LSM)
Lanthanum Strontium Manganite Paste
Lanthanum Strontium Manganite/Zirconia Paste
Palladium on Strontium Carbonate
Strontium Acetate
Strontium Acetate Hydrate
Strontium Acetate Solution
Strontium Aluminate
Strontium Aluminide
Strontium Arsenate
Strontium Boride
Strontium Bromate
Strontium Bromide
Strontium Bromide, Ultra Dry
Strontium Bromide Hexahydrate
Strontium Carbide
Strontium Carbonate
Strontium Chloride
Strontium Chloride, Ultra Dry
Strontium Chloride Hexahydrate
Strontium Chloride Solution
Strontium Chromate
Strontium Ferrite
Strontium Fluoride
Strontium Hydride
Strontium Hydroxide
Strontium Hydroxide Octahydrate
Strontium Iodate
Strontium Iodide
Strontium Lanthanum Aluminate
Strontium Lanthanum Sulfide
Strontium Molybdate
Strontium Niobate
Strontium Nitrate
Strontium Nitrate Solution
Strontium Nitride
Strontium Oxalate
Strontium Oxide
Strontium Perchlorate Hydrate
Strontium Peroxide
Strontium Phosphate
Strontium Pyrophosphate
Strontium Selenate
Strontium Silicide
Strontium Stannate
Strontium Sulfate
Strontium Sulfate Solution
Strontium Tin Oxide
Strontium Zirconate

Organometallic Compounds



Strontium 2-Ethylhexanoate
Strontium Acetylacetonate
Strontium Isopropoxide
Strontium Ranelate
Strontium Tetramethylheptanedionate
Strontium Trifluoromethanesulfonate
Crystal/ Semiconductor Materials

Barium Strontium Titanate
LSAT Single Crystral Substrate
Strontium Aluminate, Eu and Dy Doped Long Persistent Green Phosphor
Strontium Aluminate, Eu and Dy Doped Long Persistent Blue-Green Phosphor
Strontium Titanate Single Crystal Substrate
Strontium Arsenide
Strontium Barium Niobate
Strontium Phosphide
Strontium Selenide
Strontium Silicate Aluminate, Europium and Dysprosium Doped
Strontium Sulfide
Strontium Telluride
Strontium Titanate
Strontium Titanate (Bismuth Doped)
Strontium Titanate (Iron Doped)
Strontium Titanate (Niobium Doped)


Barium Strontium Titanate Nanopowder
Lanthanum Strontium Manganite Nanopowder
Lanthanum Nickelate, Strontium Doped Nanopowder
Lanthanum Nickelate Nanopowder
Samarium Strontium Cobalt Oxide Nanopowder
Strontium Aluminum Oxide Nanopowder
Strontium Carbonate Nanoparticles
Strontium Ferrite Nanopowder
Strontium Iron Oxide Nanopowder
Strontium Nanoprisms
Strontium Oxide Nanopowder
Strontium Titanate Nanoparticles
Strontium Titanate Nanopowder

Sputtering Targets

Barium Strontium Titanate Sputtering Target
Lanthanum Strontium Chromite Sputtering Target
Lanthanum Strontium Manganite Sputtering Target
Strontium Fluoride Sputtering Target
Strontium Oxide Rotatable Sputtering Target
Strontium Oxide Sputtering Target
Strontium Phosphide Sputtering Target
Strontium Rotatable Sputtering Target
Strontium Ruthenate Sputtering Target
Strontium Selenide Sputtering Target
Strontium Sputtering Target
Strontium Telluride Sputtering Target
Strontium Titanate Sputtering Target

Oxide Forms

Barium Strontium Niobium Oxide
Barium Strontium Titanium Oxide
Samarium Strontium Cobalt Oxide
Strontium Lanthanum Aluminum Oxide
Strontium Lanthanum Gallium Oxide
Strondium Oxide Pellets
Strondium Oxide Pieces
Strondium Oxide Powder
Strontium Oxide Shot
Strontium Oxide Tablets


Aluminum Strontium Alloy

Recent Research & Development for Strontium

  • Narendar Nasani, Devaraj Ramasamy, Isabel Antunes, Budhendra Singh, Duncan P. Fagg, Structural and electrical properties of strontium substituted Y2BaNiO5, Journal of Alloys and Compounds, Volume 620, 25 January 2015
  • Wolfgang Rheinheimer, Michael Bäurer, Harry Chien, Gregory S. Rohrer, Carol A. Handwerker, John E. Blendell, Michael J. Hoffmann, The equilibrium crystal shape of strontium titanate and its relationship to the grain boundary plane distribution, Acta Materialia, Volume 82, 1 January 2015
  • Leliang Li, Jun Zheng, Yuhua Zuo, Buwen Cheng, Qiming Wang, Efficient 1.54-µm emission through Eu2+ sensitization of Er3+ in thin films of Eu2+/Er3+ codoped barium strontium silicate under broad ultraviolet light excitation, Journal of Luminescence, Volume 157, January 2015
  • Agata Bialy, Peter B. Jensen, Didier Blanchard, Tejs Vegge, Ulrich J. Quaade, Solid solution barium–strontium chlorides with tunable ammonia desorption properties and superior storage capacity, Journal of Solid State Chemistry, Volume 221, January 2015
  • Poonam Pahuja, R.K. Kotnala, R.P. Tandon, Effect of rare earth substitution on properties of barium strontium titanate ceramic and its multiferroic composite with nickel cobalt ferrite, Journal of Alloys and Compounds, Volume 617, 25 December 2014
  • Muhammad Naeem Ashiq, Raheela Beenish Qureshi, Muhammad Aslam Malana, Muhammad Fahad Ehsan, Synthesis, structural, magnetic and dielectric properties of zirconium copper doped M-type calcium strontium hexaferrites, Journal of Alloys and Compounds, Volume 617, 25 December 2014
  • Ding Rong Ou, Mojie Cheng, Stability of manganese-oxide-modified lanthanum strontium cobaltite in the presence of chromia, Journal of Power Sources, Volume 272, 25 December 2014
  • Li Wang, P. Zhang, M.H. Habibi, Jeffrey I. Eldridge, S.M. Guo, Infrared radiative properties of plasma-sprayed strontium zirconate, Materials Letters, Volume 137, 15 December 2014
  • Boxun Hu, Manoj K. Mahapatra, Michael Keane, Heng Zhang, Prabhakar Singh, Effect of CO2 on the stability of strontium doped lanthanum manganite cathode, Journal of Power Sources, Volume 268, 5 December 2014
  • Hui Fan, Michael Keane, Prabhakar Singh, Minfang Han, Electrochemical performance and stability of lanthanum strontium cobalt ferrite oxygen electrode with gadolinia doped ceria barrier layer for reversible solid oxide fuel cell, Journal of Power Sources, Volume 268, 5 December 2014

Strontium Isotopes

Strontium has four stable isotopes: 84Sr (0.56%), 86Sr (9.86%), 87Sr (7.0%) and 88Sr (82.58%).

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
84Sr 83.913425 Observationally Stable 0+
86Sr 85.9092607309 Stable 0+
87Sr 86.9088774970 Stable 9/2+
88Sr 87.9056122571 Stable 0+