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

  • 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
  • Guoquan Yang, Jie Feng, Wang Sun, Ningning Dai, Mingyue Hou, Xiaoming Hao, Jinshuo Qiao, Kening Sun, The characteristic of strontium-site deficient perovskites SrxFe1.5Mo0.5O6-d (x = 1.9–2.0) as intermediate-temperature solid oxide fuel cell cathodes, Journal of Power Sources, Volume 268, 5 December 2014
  • Juliane Hanzig, Matthias Zschornak, Melanie Nentwich, Florian Hanzig, Sibylle Gemming, Tilmann Leisegang, Dirk C. Meyer, Strontium titanate: An all-in-one rechargeable energy storage material, Journal of Power Sources, Volume 267, 1 December 2014
  • K.V. Zakharchuk, A.A. Yaremchenko, D.P. Fagg, Electrical properties and thermal expansion of strontium aluminates, Journal of Alloys and Compounds, Volume 613, 15 November 2014
  • Tran Thi Viet Nga, Nguyen Phuc Duong, To Thanh Loan, Than Duc Hien, Key step in the synthesis of ultrafine strontium ferrite powders (SrFe12O19) by sol–gel method, Journal of Alloys and Compounds, Volume 610, 15 October 2014
  • A. Friederich, C. Kohler, M. Nikfalazar, A. Wiens, M. Sazegar, R. Jakoby, W. Bauer, J.R. Binder, Microstructure and microwave properties of inkjet printed barium strontium titanate thick-films for tunable microwave devices, Journal of the European Ceramic Society, Volume 34, Issue 12, October 2014
  • Dinesh Varshney, Arvind Yogi, Structural, electrical and magnetoresistance of titanium-doped iron (II,III) oxide (Fe3O4) thin films deposited on strontium titanate, alumina, silicon, and Float Glass, Materials Science in Semiconductor Processing, Volume 26, October 2014
  • M. Souadkia, B. Bennecer, F. Kalarasse, Elastic and lattice dynamical properties of ternary strontium chalcogenide alloys, Materials Science in Semiconductor Processing, Volume 26, October 2014
  • Li Zhang, Jie Xiao, Yongmin Xie, Yubao Tang, Jiang Liu, Meilin Liu, Behavior of strontium- and magnesium-doped gallate electrolyte in direct carbon solid oxide fuel cells, Journal of Alloys and Compounds, Volume 608, 25 September 2014
  • Feng Mao, Fei Chen, Qiang Han, Jingyu Han, Zhiqiang Cao, Tongmin Wang, Tingju Li, Real time observation on the solidification of strontium-modified zinc–aluminum–silicon alloys by synchrotron microradiography, Journal of Alloys and Compounds, Volume 608, 25 September 2014
  • Xinmin Zhang, Qing Lian, Qi Pan, Guangming Yuan, Hyo Jin Seo, Unusual Ce3+ luminescence and Ce3+ ? Tb3+ energy transfer behavior in strontium lithium borate SrLiB9O15, Journal of Alloys and Compounds, Volume 607, 15 September 2014
  • Tae-Sik Oh, Anthony S. Yu, Lawrence Adijanto, Raymond J. Gorte, John M. Vohs, Infiltrated lanthanum strontium chromite anodes for solid oxide fuel cells: Structural and catalytic aspects, Journal of Power Sources, Volume 262, 15 September 2014
  • Anindya Sundar Patra, Natarajan Vinoth Kumar, Dipankar Barpuzary, Mahuya De, Mohammad Qureshi, Strontium doped lanthanum manganites for efficient and robust photocatalytic water oxidation coupled with graphene oxide, Materials Letters, Volume 131, 15 September 2014
  • Dong-Ae Kim, Hany A. Abo-Mosallam, Hye-Young Lee, Gyu-Ri Kim, Hae-Won Kim, Hae-Hyoung Lee, Development of a novel aluminum-free glass ionomer cement based on magnesium/strontium-silicate glasses, Materials Science and Engineering: C, Volume 42, 1 September 2014
  • Shao-Ju Shih, Wei-Lung Tzeng, Manipulation of morphology of strontium titanate particles by spray pyrolysis, Powder Technology, Volume 264, September 2014
  • J.X. Liao, X.B. Wei, Z.Q. Xu, P. Wang, Effect of potassium-doped concentration on structures and dielectric performance of barium-strontium-titanate films, Vacuum, Volume 107, September 2014
  • Li Zhang, Pei Yun Tan, Chee Lap Chow, Chiew Keat Lim, Ooi Kiang Tan, Man Siu Tse, Chun Chau Sze, Antibacterial activities of mechanochemically synthesized perovskite strontium titanate ferrite metal oxide, Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 456, 20 August 2014
  • Emanuel Makrlík, Stanislav Böhm, Petr Vanura, Ivan Raich, Extraction and DFT study on the complexation of the strontium cation with enniatin B, Chemical Physics, Volume 439, 17 August 2014
  • Majid Jamalian, Ali Ghasemi, Ebrahim Paimozd, Influence of multiwalled carbon nanotube addition on the magnetic and reflection-loss characteristics of Mn–Sn–Ti substituted strontium ferrite nanoparticles, Journal of Alloys and Compounds, Volume 604, 15 August 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+