Testbourne Ltd - Products for Research, Development and Industry
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Instruments
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Ceramaseal® UHV Components
- Feedthroughs
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- Terminals
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Inficon/Maxtek/Sigma - Thin Film Measurement and Vacuum Control
- Thin Film Deposition
- Research Quartz Crystal Microbalance (RQCM)
- Vacuum Feedthroughs
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Vacuum Components
- ISO-KF Connection Elements
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- ISO-KF Pipe Fittings
- ISO-KF Bellows & Hoses with Flanges
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- ISO-KF Hose & Hose Connection
- ISO-KF Protective Lids
- ISO-K Connection Elements
- ISO-K Centering Rings & Seals
- ISO-K Flanges
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- ISO-K Bellows & Hoses with Flanges
- ISO-K Transition Pieces
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- ISO-F Flange Components
- CF Connection Elements
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- Inspection Documents Service
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Wide Range Vacuum Gauges
- NEW Inverted Magnetron Pirani Gauges
- Inverted Magnetron Pirani Gauges
- Penning Cold Cathode Gauges
- NEW Bayard-Alpert Gauges
- Bayard - Alpert Pirani Gauges
- High Pressure Hot Ionization Pirani Gauges
- Bayard Alpert Pirani Capacitance Diaphragm Gauges - Triple Gauge™
- Pirani Standard Gauges
- Pirani Standard Gauges - advanced series
- Pirani Capacitance Diaphragm Gauges
- EtherCAT Vacuum Instrumentation
- Calibration Service for Vacuum Gauges
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High Precision Vacuum Gauges
- Compact Capacitance Diaphragm Gauges
- Ambient Capacitance Diaphragm Gauges
- 45°C Capacitance Diaphragm Gauges
- Heated 100 ... 200°C Capacitance Diaphragm Gauges
- Compact heated 45°... 100°C Capacitance Diaphragm Gauges
- High speed heated 45 ... 200°C Capacitance Diaphragm Gauges
- Reference Capacitance Diaphragm Gauges
- Vacuum Switch
- OEM Capacitance Diaphragm Sensor
- EtherCAT Vacuum Instrumentation
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- Quartz Sensor Crystals
- Moorfield Nanotechnology
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Vacuum Evaporation Sources
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Materials
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Metals
- Aluminium, Al
- Antimony, Sb
- Arsenic, As
- Barium, Ba
- Beryllium, Be
- Bismuth, Bi
- Boron, B
- Cadmium, Cd
- Calcium, Ca
- Carbon, C (Graphite)
- Cerium, Ce
- Cesium, Cs
- Chromium, Cr
- Cobalt, Co
- Copper, Cu
- Dysprosium, Dy
- Erbium, Er
- Europium, Eu
- Gadolinium, Gd
- Gallium, Ga
- Germanium, Ge
- Gold, Au
- Hafnium, Hf
- Holmium, Ho
- Indium, In
- Iridium, Ir
- Iron, Fe
- Lanthanum, La
- Lead, Pb
- Lithium, Li
- Lutetium, Lu
- Magnesium, Mg
- Manganese, Mn
- Mercury, Hg
- Molybdenum, Mo
- Neodymium, Nd
- Nickel, Ni
- Niobium, Nb
- Osmium, Os
- Palladium, Pd
- Phosphorus, P
- Platinum, Pt
- Potassium, K
- Praseodymium, Pr
- Rhenium, Re
- Rhodium, Rh
- Rubidium, Rb
- Ruthenium, Ru
- Samarium, Sm
- Scandium, Sc
- Selenium, Se
- Silicon, Si
- Silver, Ag
- Sodium, Na
- Strontium, Sr
- Sulphur, S
- Tantalum, Ta
- Tellurium, Te
- Terbium, Tb
- Thallium, Tl
- Thulium, Tm
- Tin, Sn
- Titanium, Ti
- Tungsten, W
- Vanadium, V
- Ytterbium, Yb
- Yttrium, Y
- Zinc, Zn
- Zirconium, Zr
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Compounds
- Aluminium, Al
- Antimony, Sb
- Arsenic, As
- Barium, Ba
- Beryllium, Be
- Bismuth, Bi
- Boron, B
- Cadmium, Cd
- Calcium, Ca
- Carbon, C (Graphite)
- Cerium, Ce
- Cesium, Cs
- Chromium, Cr
- Cobalt, Co
- Copper, Cu
- Dysprosium, Dy
- Erbium, Er
- Europium, Eu
- Gadolinium, Gd
- Gallium, Ga
- Germanium, Ge
- Gold, Au
- Hafnium, Hf
- Holmium, Ho
- Indium, In
- Iridium, Ir
- Iron, Fe
- Lanthanum, La
- Lead, Pb
- Lithium, Li
- Lutetium, Lu
- Magnesium, Mg
- Manganese, Mn
- Molybdenum, Mo
- Neodymium, Nd
- Nickel, Ni
- Niobium, Nb
- Palladium, Pd
- Phosphorus, P
- Platinum, Pt
- Potassium, K
- Praseodymium, Pr
- Rhenium, Re
- Rubidium, Rb
- Ruthenium, Ru
- Samarium, Sm
- Scandium, Sc
- Selenium, Se
- Silicon, Si
- Silver, Ag
- Sodium, Na
- Strontium, Sr
- Tantalum, Ta
- Tellurium, Te
- Terbium, Tb
- Thallium, Tl
- Thulium, Tm
- Tin, Sn
- Titanium, Ti
- Tungsten, W
- Vanadium, V
- Ytterbium, Yb
- Yttrium, Y
- Zinc, Zn
- Zirconium, Zr
- Alloy/Mixture
- Precious Metals
- Sputtering Targets
- Electron Beam Gun Crucibles
- Single crystals & Ceramics
- Hard wearing & Decorative Coatings
- Architectural, Automotive Glass & WEB Coating
- Semiconductor Materials
- Nanometre Powders
Cesium, Cs
Caesium or cesium is the chemical element with the symbol Cs and atomic number 55. It is a soft silvery-gold alkali metal with a melting point of 28 °C (83 °F), which makes it one of the metals that are liquid at or near room temperature, along with rubidium (39 °C [102 °F]), francium (27 °C [81 °F]), mercury (−39 °C [−38 °F]), and gallium (30 °C [86 °F]). This element is most notably used in atomic clocks.
The variant spelling cesium is used especially in North American English, but caesium is the spelling used by the IUPAC.
Evaporation Materials| Symbol | Cs | Density (25°C)/gcm-3 | 1.9 |
| Atomic number | 55 | Melting point / °C | 28.5 |
| No. of naturally occurring isotopes | 1 | Boiling point / °C | 705 |
| Atomic weight | 132.9054 | ΔHfus/kJmol-1 | 2.09 |
| Electronic configuration | [Xe] 6s1 | ΔHvap/kJmol-1 | 67 |
| Ionization energy/kJmol-1 | 375.6 | ΔHf(monoatomic gas)/kJmol-1 | 79 |
| Metal radius/pm | 265 | Eo(M+(aq)+e- →M(S))/V | -2.92 |
| Ionic radius (6-coordinate)/pm | 167 |
| Temperature (oC) @Vap. Pressure | Techniques | Remarks | |||||
| 10-8 Torr | 10-6 Torr | 10-4 Torr | Electron Beam | Crucible | Coil | Boat | |
| -16 | +22 | +30 | - | Quartz | - | Stainless Steel | |
| C5-5000-M solid pieces (sealed in glass) |