Silver, Ag

Silver is a chemical element with the symbol "Ag" and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal conductivity of any metal. It occurs as a pure free metal (native silver) and alloyed with gold, as well as in various minerals, such as argentite and chlorargyrite. Most silver is produced as a by-product of copper, gold, lead, and zinc mining.

Silver has been known since ancient times, and it is used as a bonus metal. It has long been valued as a precious metal used to make ornaments, jewellery and high-value tableware and utensils (hence the term "silverware"). Today, silver metal is used in electrical contacts and conductors, in mirrors and in catalysis of chemical reactions. Its compounds are used in photographic film and dilute solutions of silver nitrate and other silver compounds are used as disinfectants. Although the antimicrobial uses of silver have largely been supplanted by the use of antibiotics, its antiseptic properties are still a useful tool in the prevention and treatment of sepsis and infections caused by antibiotic-resistant microorganisms such as MRSA.

Technical Data
Symbol Ag Density (20°C)/gcm-3 10.49
Atomic number 47 Melting point /°C 961
No. of naturally occurring isotopes 2 Boiling point /°C 2155
Atomic weight 107.8682(+/-3) ΔHfus/kJmol-1 11.1
Electronic configuration [Kr]4d105s1 ΔHvap/kJmol-1 258(+/-6)
Metal radius(12-coordinate)/pm 144 ΔHf(monoatomic gas)/kJmol-1 284(+/-4)
Ionic radius(6-coordinate)/pm III 75 Ionization energy/kJmol-1 I 730.8
Ionic radius(6-coordinate)/pm II 94 Ionization energy/kJmol-1 II 2072.6
Ionic radius(6-coordinate)/pm I 115 Ionization energy/kJmol-1 III 3359.4
Electrical resistivity (20°C)/M.ohm cm 1.59 Electronegativity χ 1.9
Evaporation Techniques
Temperature (oC) @Vap. Pressure Techniques Remarks
10-8 Torr 10-6 Torr 10-4 Torr Electron Beam Crucible Coil Boat
847 958 1105 Excellent Al2O3 & Molybdenum Tungsten Molybdenum & Tantalum Evaporates well from any source

Evaporation Materials
S5-5002-M pellets 6mm diameter x 6mm long
S5-5003-M pellets 6mm diameter x 12mm long
S5-5005-M pieces 1-3mm
S5-5009-M pieces 2-8mm

The foils are available in either rectangular or circular shape. Please enter width and length or diameter of the required foil.

Foil
S5-3001-F 0.002" (0.050mm)
S5-3003-F 0.004" (0.10mm)
S5-3005-F 0.006" (0.152mm)
S5-3007-F 0.008" (0.20mm)
Powder
S5-10000-P -20 mesh (electrolytic)
S5-10002-P -325 mesh
S5-10005-P typ. 1 micron (agglomerated)
Rods
S5-2000-R 0.0625" (1.58mm)
S5-2001-R 0.125" (3.175mm)
S5-2002-R 0.250" (6.35mm)
S5-2003-R 0.500" (12.7mm)
S5-2004-R 0.625" (15.88mm)
S5-2005-R 0.750" (19.05mm)
S5-2006-R 1" (25.4mm)
Sheet
S5-4001-S 0.015" (0.38mm)
S5-4002-S 0.020" (0.5mm)
S5-4003-S 0.030" (0.76mm)
S5-4004-S 0.040" (1mm)
S5-4006-S 0.060" (1.5mm)
S5-4008-S 0.125" (3.175mm)
S5-4009-S 0.250" (6.35mm)
S5-4010-S 0.375" (9.525mm)
S5-4011-S 0.500" (12.7mm)
S5-4012-S 0.750" (19.05mm)
S5-4013-S 1" (25.4mm)
Wire
S5-1004-W 0.004" (0.10mm)
S5-1008-W 0.008" (0.203mm)
S5-1012-W 0.020" (0.5mm)
S5-1014-W 0.040" (1.0mm)
S5-1016-W 0.060" (1.5mm)
S5-1018-W 0.080" (2.0mm)