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- Strontium Metal (Sr) & Powder Synonyms:
Strontium metal, Sr, strontium, strontium metal granules, strontium pieces, strontium metal ingot, CAS 7440-24-6, UN 1393, UN 3132,
- Strontium Metal (Sr) & Powder Designations:
Chemical Name: Strontium
Chemical Formula: Sr
a) 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.
b) Both strontium and strontianite are named after Strontian, a village in Scotland near which the mineral was first discovered.
99%, 99.5%, and 99.95%
Pieces, granules and ingot
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Atomic Number
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38
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Molecular Weight (g/mol.)
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87.62
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Apparent Density (g/cm3)
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2.6
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Heat of Fusion (cal/g-atom)
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2.1
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Specific Heat @25°C (cal/g-°C)
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0.176
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Melting Point (°C)
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770
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Boiling Point (°C)
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1380
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RTECS Number
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WK7700000
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Heat of Vaporization (cal/g)
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42.3
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Atomic Volume (W/D)
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33.7
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Mohs Hardness @20 deg.C
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1.8
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Covalent Radius (angstroms)
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1.91
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Crystallography
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cubic
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a) Producing glass for color television picture tubes, ferrite magnets, refining zinc, high-energy beta emitter known, and used in the promising nuclear SNAP devices.
b) As a pure metal strontium is used in strontium 90%-aluminium 10% alloys of an eutectic composition for the modification of aluminium-silicon casting alloys. Strontium is 2% by weight of AJ62 alloy, a durable creep resistant magnesium alloy used in car and motorcycle engines by BMW.
c) CRT computer monitor front panel made from strontium and barium oxide containing glassThe primary use for strontium compounds is in glass for colour television cathode ray tubes to prevent X-ray emission. All parts of the CRT tube have to absorb X-rays. In the neck and the funnel of the tube lead glass is used for this purpose, but this type of glass shows a browning effect due to the interaction of the X-rays with the glass. Therefore the front panal has to use a different glass mixture, in which strontium and barium are the X-ray absorbing materials. The avarage values for the class mixture determined for a recycling studie in 2005 is 8.5% strontium oxide and 10% barium oxide.
Ampouled under argon with a thin oil layer, & packaged under argon
Listed. For further information please call the E.P.A. at +1.202.554.1404
CAS# 7440-24-6
1393 and 3132
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