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Sr
Strontium

Strontium , Sr

Strontium is a chemical element with the symbol Sr and the atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when exposed to air. It occurs naturally in the minerals celestine and strontianite. The 90Sr isotope is present in radioactive fallout and has a half-life of 28.90 years.

 

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S7-5000-M
Sr 6mm Pieces and smaller 99.9% PureStrontium
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S7-5010-M
SrTiO3 1-6mm Pieces (melted)0.999Strontium Titanate
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S7-5011-M
SrTaO 1-6mm Pieces (melted) 99.9%Strontium tantalum oxide
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S7-5012-M
Sr 3-6mm Pieces 99.9% PurePacked under high purity oilStrontium
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S7-10000-P
SrAl2O4 -100 Mesh 99.5%Strontium Aluminate
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S7-10004-P
SrC2 -8 Mesh 99% PureStrontium Carbide
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S7-10005-P
SrCO3 -20 Mesh 99.999% PureStrontium Carbonate
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S7-10006-P
SrCO3 -100 Mesh 99.5% PureStrontium Carbonate
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S7-10007-P
SrCl2 -40 Mesh 99.5% PureStrontium Chloride
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S7-10008-P
SrCrO4 -80 Mesh 99% PureStrontium Chromate
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S7-10009-P
SrFe12O19 -325 Mesh (typ =10 microns) 99.5%Strontium Ferrite
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S7-10010-P
SrF2 -200 Mesh (precipitated) 99.9%Strontium Fluoride
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S7-10011-P
SrF2 -325 Mesh (typ. =10 microns) 99%Strontium Fluoride
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S7-10012-P
SrGa2S4 -200 Mesh 99.0.09Strontium Gallium Sulphide
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S7-10015-P
SrMoO4 -200 Mesh 99.9% PureStrontium Molybdate
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S7-10016-P
SrNb2O6 -200 Mesh 99.9% PureStrontium Niobate
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S7-10017-P
Sr(NO3)2 -8 Mesh 99.999% PureStrontium Nitrate
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S7-10018-P
Sr3N2 -60 Mesh 99.5% PureStrontium Nitride
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S7-10019-P
SrO -100 Mesh 99.5% PureStrontium Oxide
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S7-10020-P
SrSe -20 Mesh 99.5% PureStrontium Selenide
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S7-10021-P
SrSnO3 -200 Mesh 99.5% PureStrontium Stannate
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S7-10022-P
SrSO4 -10 Mesh 99.9% PureStrontium Sulphate
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S7-10023-P
SrS -100 Mesh 99.999% PureStrontium Sulphide
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S7-10024-P

SrS -200 Mesh 99.9% Pure

Strontium Sulphide

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S7-10025-P

SrTa2O6 -200 Mesh 99.9% Pure

Strontium Tantalate

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S7-10026-P
SrTe -20 Mesh 99.5% PureStrontium Telluride
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S7-10027-P
SrTiO3 -200 Mesh 99.9% PureStrontium Titanate
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S7-10028-P
SrWO4 -200 Mesh 99.9% PureStrontium Tungstate
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S7-10029-P
SrZrO3 -100 +200 Mesh 99.5Strontium Zirconate
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S7-10030-P
SrZrO3 -150 +325 Mesh 99.5%Strontium Zirconate
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S7-10031-P
SrZrO3 -325 Mesh +10 microns 99.5%Strontium Zirconate
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S7-10032-P
SrZrO3 -325 Mesh (typ. =10 microns) 99.5%Strontium Zirconate
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S7-2000-R

Sr Rod 12.7mm diameter 99.9% pure

Strontium

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S7-2000-R1
Sr Rod Min 98% (Sr+Ba) 22mm dia x 15mm - 30mm longMaterial packed in oilStrontium
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S7-9000-D

Strontium Sr,

Available Purities 99.9% & 99.99%

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S7-9001-D

Strontium-Cobalt-Titanium-Iron oxide SrCo2Ti2Fe8O19,

Purity 99.5%

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S7-9002-D

Strontium cobalt oxide SrCoO,

Available in various ratios wt% or at%, Purity 99.5% & 99.9%

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S7-9003-D

Strontium Titanate SrTiO3,

Available Purities 99.9% & 99.99%

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S7-9004-D

Strontium Lanthanum Aluminium oxide SrLaAlO4,

Purity 99.9%

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S7-9005-D

Strontium-Iron oxide SrFe12O19,

Purity 99.9%

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S7-9006-D

Strontium Ruthenium oxide SrRuO3,

Purity 99.9%

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S7-9007-D

Strontium Vanadate SrVO3,

Purity 99.9%

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S7-9008-D

Strontium Titanium Niobium oxide Sr-Ti-NbO3,

Available in various ratios wt% or at%, Purity 99.95%

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S7-9009-D

Strontium Lanthanum Titanate Sr-La-TiO3,

Available in various ratios wt% or at%, Purity 99.9%

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S7-9010-D

Strontium Molybdenum oxide SrMoO3,

Purity 99.9%

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S7-9011-D
Strontium Titanate-Niobium SrTiO3-Nb, Available in various ratios wt% or at%, Purity 99.99%
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S7-9012-D

Strontium Manganese oxide SrMnO3,

Purity 99.9%

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S7-9013-D

Strontium Titanate doped with Niobium SrTiO3-Nb,

Available in various ratios wt% or at%, Purity 99.95%

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S7-9014-D

Strontium-Chromium-Rhenium oxide Sr2CrReO6,

Purity 99.95%

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S7-9015-D

Strontium-Iron-Molybdenum oxide Sr2FeMoO6,

Purity 99.95%

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S7-9017-D

Strontium oxide SiO,

Purity 99.9%

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S7-9018-D

Strontium Chromium oxide SrCrO3,

Purity 99.9%

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S7-9019-D

Strontium Zirconium oxide SrZrO3,

Purity 99.9%

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S7-9020-D

Strontium Cobalt Iron Oxide Sr-Co-FeO,

Available in various ratios wt% or at%, Purity 99.9%

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Can't find what you are looking for?

S7-9017-D1
SrO TRG 25.4mm dia. x 3.18mm Tk 99.9% PureDensity ~80%Strontium oxide
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S7-9003-D60

SrTiO3 substrate 10mm x 10mm x 0.5mm Tk

Strontium titanate

CRY-SrTiO3

Strontium Titanate Single Crystal SrTiO3

 

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CRY-SrTiO3-Fe

Iron-doped Strontium titanate single crystal substrate

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CRY-SrTiO3-Nb

Niobium doped Strontium titanate substrate

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CRY-SrTiO3-Nd

Neodymium doped strontium titanate Single Crystal

Concentration 0.05wt%

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Due to its extreme reactivity to air, this element occurs naturally only in compounds with other elements, as in the minerals strontianite and celestite.

Strontium is a bright silvery metal that is softer than calcium and even more reactive in water, which strontium decomposes on contact with to produce strontium hydroxide and hydrogen gas. It burns in air to produce both strontium oxide and strontium nitride, but since it does not react with nitrogen below 380°C it will only form the oxide spontaneously at room temperature. It should be kept under kerosene to prevent oxidation; freshly exposed strontium metal rapidly turns a yellowish color with the formation of the oxide. Finely powdered strontium metal will ignite spontaneously in air. Volatile strontium salts impart a crimson color to flames, and these salts are used in pyrotechnics and in the production of flares. Natural strontium is a mixture of four stable isotopes.

Symbol Sr
Atomic number 38
No. of naturally occurring isotopes 4
Atomic weight 87.62
Electronic configuration [Kr]5s2
Metal radius/pm 215
Ionic radius(6-coordinate)/pm 118
Ionization energy/kJmolI 549.2
Ionization energy/kJmolII 1064
Density (20°C)/gcm 2.63
Melting point / °C 768
Boiling point / °C 1381
ΔHfus/kJmol-1 8.2
ΔHvap/kJmol-1 158
Electrical resistivity (20°C)/μohm cm 23
E° (M2+(aq)\ + 2e- →M(s))/V -2.89
Temperature (oC) @Vap. Pressure
10-8 Torr 239
10-6 Torr 309
10-4 Torr 403
Techniques
Electron Beam Poor
Crucible Vitreous Graphite
Coil Tungsten
Boat Tungsten, Molybdenum & Tantalum
Remarks
Wets but does not alloy with refractory metals. May react violently in air.