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Silver
Silver information, including safety data and its properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.

Silver has a brilliant white metallic luster. It is a little harder than gold and is very ductile and malleable, being exceeded only by gold and perhaps palladium. Pure silver has the highest electrical and thermal conductivity of all metals, and possesses the lowest contact resistance. It is stable in pure air and water, but tarnishes when exposed to ozone, hydrogen sulfide, or air containing sulfur . Silver nitrate has wide application in painting, xerography, chemical electroplating, in compo nents for electric batteries and in medicine as catalyst. Silver chloride is another important compound, due to its ductility and malleability. The organic compounds of the element are used in the coating of several metals and in dynamite or other explosive bars. Metallic silver is used as a catalyst of several oxidation reactions such as those of ethanol and other alcohols. Silver is available as metal and compounds with purities from 99% to 99.9999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder.  Silver is also used in various metal alloys (See AE Alloys).

Silver facts, including appearance, CAS #, and molecular formula and safety data, research and properties are

 

  Hydrogen                                 Helium
  Lithium Beryllium                     Boron Carbon Nitrogen Oxygen Fluorine Neon
  Sodium Magnesium                     Aluminum Silicon Phosphorus Sulfur Chlorine Argon
  Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Hydrogen Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
  Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
  Cesium Barium Cerium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon
                                     
      Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium    
      Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawerencium    


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available for many specific states, forms and shapes on the product pages listed to the left. Elemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. Nanoparticles and nanopowders provide ultra high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits.

Oxides are available in forms including powders and dense pellets for such uses as optical coating and thin film applications. Oxides tend to be insoluble. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Silver is available in soluble forms including chlorides, nitrates and acetates. These compounds are also manufactured as solutions at specified stoichiometries.

Silver is a Block D, Group 11, Period 5 element. The electronic configuration is [Kr]4d105s1. In its elemental form silver's CAS number is 7440-22-4. The silver atom has a radius of 144.5.pm and it's Van der Waals radius is 144.pm.

All elemental metals, compounds and solutions may be synthesized in ultra high purity (e.g. 99.999%) for laboratory standards, advanced electronic, metallurgy and optical materials and other high technology advantages. Information is provided for stable (non-radioactive) isotopes. Organo-Metallic Silver compounds are soluble in organic or non-aqueous solvents. See Analytical Services for information on available certified chemical and physical analysis techniques including MS-ICP, X-Ray Diffraction, PSD and Surface Area (BET) analysis.

Silver was first discovered by Early Man.

French Argent German Silber Italian Argento Portuguese Prata Spanish Plata Swedish Silver

Silver Abundance. The following table shows the abundance of silver and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope.

Isotope
Atomic Mass
% Abundance on Earth
Ag-107
106.905
51.84
Ag-109
108.905
48.16

Silver Safety Data. The safety data for Silver metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.

Ionization Energy. The ionization energy for Silver (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table:

1st Ionization Energy
731.01 kJ mol-1
2nd Ionization Energy
2073.48 kJ mol-1
3rd Ionization Energy
3360.61 kJ mol-1

Conductivity. As to Silver's electrical and thermal conductivity, the electrical conductivity measured in terms of electrical resistivity @ 20 ºC is 1.59 µOcm and its electronegativities (or its ability to draw electrons relative to other elements) is 1.93. The thermal conductivity of Silver is 429 W m-1 K-1.

Thermal Properties of Silver. The melting point and boiling point for Silver are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.

Heat of Fusion
11.3 kJ mol-1
Heat of Vaporization
257.7 kJ mol-1
Heat of Atomization
284.09 kJ mol-1



 
Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point
Boiling Point
Vanderwaals radius
Ionic radius Energy of first ionization
Ag 47 107.87 g.mol -1 1.9 10.5 g.cm-3 at 20 °C 962 °C 2212 °C 0.144 nm 0.126 nm 758 kJ.mol-1

PRODUCT CATALOG UK Operations Submicron & Nanopowder Tolling Ultra High Purity Sputtering Target Crystal Growth Rod, Plate, Powder, etc. Foil
 
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Recent Research & Development for Silver

  • Tryptophan-Based Peptides to Synthesize Gold and Silver Nanoparticles: A Mechanistic and Kinetic Study.
    Chemistry. 2007 Jan 24; [Epub ahead of print]

  • A comparative study of the cytotoxicity of silver-based dressings in monolayer cell, tissue explant, and animal models.
    Wound Repair Regen. 2007 Jan-Feb;15(1):94-104.

  • In vitro evaluation of five core materials.
    J Prosthodont. 2007 Jan-Feb;16(1):25-30.

  • [Inheritance instability of chromosome 6q in patients with gastric cancer]
    Sichuan Da Xue Xue Bao Yi Xue Ban. 2006 Nov;37(6):852-5. Chinese.

  • Optical switching of coupled plasmons of Ag-nanoparticles by photoisomerisation of an azobenzene ligand.
    Phys Chem Chem Phys. 2007 Feb 7;9(5):651-8. Epub 2006 Dec 11.

  • A noninvasive optical system for the measurement of xylem and phloem sap flow in woody plants of small stem size.
    Tree Physiol. 2007 Feb;27(2):169-79.

  • Nutrition recommendations for masters athletes.
    Clin Sports Med. 2007 Jan;26(1):91-100.

  • Silver and gold nanoparticle-coated membranes for femtomole detection of small proteins and peptides by Dot and Western blot.
    Anal Biochem. 2006 Dec 20; [Epub ahead of print] No abstract available.

  • VGluT1- and GAD-immunoreactive terminals in synaptic contact with PAG-immunopositive neurons in principal sensory trigeminal nucleus of rat.
    Acta Pharmacol Sin. 2007 Feb;28(2):180-4.

  • Manipulation of the growth of gold and silver nanomaterials on glass by seeding approach.
    Langmuir. 2007 Jan 30;23(3):1435-42.

 

 

 

 

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