Cesium
MATERIAL OVERVIEW
Characteristics: Liquid at slightly above room temperature; soft solid below melting point. Highly reactive. Decomposes in water, with evolution of hydrogen, which ignites instantly. Also reacts violently with oxygen, the halogens, sulfur, and phosphorus, with spontaneous ignition and/or explosion. Mohs hardness 0.2. Cesium has highest position in the electromotive series; it also has the lowest melting point of any alkali metal, and the lowest ionization potential of any element. Soluble in acids and alcohol. Low toxicity.
Derivation: By thermochemical reduction of CsCl with calcium, or by electrolysis of fused cyanide. Its chief ore is pollucite, found in Maine, S. Dakota, Manitoba, Elba, S. Africa.
Hazard: Dangerous fire and explosion risk. Ignites spontaneously in moist air; may explode in contact with sulfur or phosphorus. Reacts violently with oxidizing materials. Causes burns on contact with skin.
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GENERAL PROPERTIES
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Symbol: |
Cs |
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Atomic Number: |
55 |
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Atomic Weight: |
132.9054 |
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Density: |
1.873 gm/cc |
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Melting Point: |
28.40 oC |
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Boiling Point: |
669.3 oC |
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Thermal Conductivity: |
0.359 W/cm/K @ 298.2 K |
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Electrical Resistivity: |
20 microhm-cm @ 20 oC |
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Electronegativity: |
0.7 Paulings |
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Specific Heat: |
0.057 Cal/g/K @ 25 oC |
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Heat of Vaporization: |
16.3 K-Cal/gm atom at 669.3 oC |
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Heat of Fusion: |
0.5 Cal/gm mole |
ALKALI METALS VIDEO CLIPS
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Courtesy of Open University
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TYPICAL ANALYSES - Impurities in ppm
| Material / Purity: | 3N | Material / Purity: | 3N |
| Al | 7 | Fe | 7 |
| Mg | 1 | Mn | <1 |
| Ni | <7 | Pb | <7 |
| V | <1 | Ba | <4 |
| B | <7 | Ca | 1 |
| Cu | <7 | Cr | <7 |
| Si | <7 | Na | <7 |
| K | <1 | Rb | <1 |
| Be | <1 | Ag | <1 |
| Zr | <13 | Sn | <7 |
| Sr | <1 | Co | <7 |
| Ti | <7 | Mo | <7 |
SPECIFICATIONS:
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Pre-Scored: |
Size |
O.D. |
Length |
Glass Type |
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1 Gram |
10.5 mm |
50-52 mm |
Pyrex |
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5 Gram |
16.6 mm |
70 mm |
Pyrex |
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25 Gram |
22.5 mm |
115 mm |
Pyrex |
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50 Gram |
28.5 mm |
160 mm |
Pyrex |
CESIUM METAL
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Material |
Purity |
| Cesium Metal 1 gm Pre-Scored Ampoule | 3N+ |
| Cesium Metal 5 gm Pre-Scored Ampoule | 3N+ |
| Cesium Metal 25 gm Pre-Scored Ampoule | 3N+ |
| Cesium Metal 0.5 gm Breakseal Ampoule | 3N+ |
| Cesium Metal 10 gm Breakseal Ampoule | 3N+ |
Cesium metals are packaged in glass ampoules under argon and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.
CESIUM COMPOUNDS
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Material |
Purity |
Cesium Acetate CsC2H3O2 -100 Mesh  |
2N |
| Cesium Carbonate Cs2CO3 -20 Mesh |
3N |
| Cesium Chloride CsCl -60 Mesh |
2N |
| Cesium Chloride CsCl -100 Mesh |
3N |
| Cesium Chromate CsCrO4 -20 Mesh |
3N |
| Cesium Fluoride CsF -40 Mesh |
3N |
| Cesium Iodide CsI -8 Mesh |
3N |
| Cesium Molybdate Cs2MoO4 -20 Mesh |
2N |
| Cesium Sulfate Cs2SO4 |
3N |
Compounds are packaged in glass ampoules under argon and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.
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ALLOYS 
