Metals
- Elements List
- 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
- Thorium, Th
- Thulium, Tm
- Tin, Sn
- Titanium, Ti
- Tungsten, W
- Vanadium, V
- Ytterbium, Yb
- Yttrium, Y
- Zinc, Zn
- Zirconium, Zr
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Chromium, Cr
Description
Chromium is a chemical element which has the symbol Cr and atomic number 24. It is a steel-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odourless, tasteless, and malleable.
Available Forms:
| Technical Data | ||||||||
| Symbol | Cr | Ionic radius(6-coordinate)/pm IV | 55 | |||||
| Atomic number | 24 | Density (20°C)/gcm-3 | 7.14 | |||||
| No. of naturally occurring isotopes | 4 | Melting point / °C | 1900 | |||||
| Atomic weight | 51.996 | Boiling point / °C | 2690 | |||||
| Electronic configuration | [Ar]3d54s1 | ΔHfus/kJmol-1 | 21 (+/-2) | |||||
| Ionization energy/kJmol -1 | 653 | ΔHvap/kJmol-1 | 342 (+/-6) | |||||
| II | 1592 | ΔHf(monoatomic gas)/kJmol-1 | 397 (+/-3) | |||||
| III | 2987 | Electrical resistivity | ||||||
| Metal radius(12-coordinate)/pm | 128 | (20°C)/ μohm cm | 13 | |||||
| Ionic radius(6-coordinate)/pm VI | 44 | Electronegativity χ | 1.6 | |||||
| Ionic radius(6-coordinatc)/pm V | 49 | |||||||
| Evaporation Techniques | ||||||||
| Temperature (oC) @Vap. Pressure | Techniques | Remarks | ||||||
| 10-8 Torr | 10-6 Torr | 10-4 Torr | Electron Beam | Crucible | Coil | Boat | ||
| 837 Sublimes | 977 Sublimes | 1157 Sublimes | Good | Vitreous Graphite | Tungsten | Cr plated rod or strip | Films very adherent. High rates possible. Cr plated rods are ideal for depositing Cr. Go to Evaporation Sources Page | |
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