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Project at a Glance Contents on the CD ROM
  • Neptunium is a chemical element with the Symbol Np, Atomic number 93, Electron configuration [Rn] 5f4 6d1 7s2,Atomic number 93, Atomic mass 237 u.

  • Neptunium lies in Row 7 of the periodic table.

  • Elements in Row 7 are also called actinide elements.

  • Neptunium is a silvery radioactive synthetic metal.

  • Neptunium melting point of 640C (1,180F) and a density of 20.45 grams per cubic centimeter.

  • Neptunium is harmful due to its radioactivity.

  • Neptunium forms numerous chemical compounds.

  • Neptunium and its compounds of neptunium have been made for research purposes.

  • Neptunium is a ductile, silver-colored metal about twice as dense as lead.

  • Chemically it is extremely reactive and is attacked by oxygen, steam and acids, but not by alkalis.

  • Neptunium is prepared by the reduction of NpF3 with barium or lithium vapor at about 1200oC.

  • Neptunium forms numerous chemical compounds.

  • Neptunium is the first transuranium element.

  • Neptunium is used commercially only in specialized detection devices.

  • Neptunium was once a very rare element, but it can now be somewhat easily produced in a nuclear reactor.

  • The element is named after the planet Neptune.

  • The Chemistry Of Elements Neptunium
  • Hydrolysis of Neptunium at Variable Temperatures
  • Neglected neptunium
  • Separated Neptunium and Americium
  • Neptunium World Inventories and Proliferation Concerns
  • Solvent extraction of neptunium
  • Neptunium Transport Behavior in the Vicinity of Underground Nuclear


  • Neptunium
  • Application of the underscreened Kondo lattice model to neptunium compounds
  • Thermodynamic Interpretation Of Neptunium
  • Possible Incorporation of
    Neptunium in Uranyl Alteration Phases


  • Effect Of Carbonate On The Solubility Of Neptunium
  • Irradiation Effects On Neptunium Oxidation States
  • Effects of Groundwater Humic Substances
    on Sorption of Np on Sandy materials
  • Measure Of Small Resonance Effects In Np


  • Development and Performance of Processes and Equipment to Recover Neptunium
  • The Crystal Chemistry Of Neptunium Compound

Fact Sheet

  • Chemical Fact Sheet Neptunium
  • Neptunium
  • Radiological and Chemical Fact Sheets


  • Np1


  • Neptunium Disposal To The Savannah River Ste Tank Farm
  • Recovery Of Uranium And Neptunium


  • The Kinetics of the
    Oxidation-Reduction Reactions Neptunium
  • Magnetic And Electronic Properties Of Neptunium
  • The Migration Chemistry Of Neptunium
  • The Radiochemistry Of Neptunium
  • Radiochemistry Of Neptunium
  • Rapid and Automated Determination of  Neptunium
  • Sorption and Direct Speciation of Neptunium
  • Spatial Distribution of Neptunium


  • The Homeopathic Proving Of Neptunium Muriaticum


  • Method Of Separating Neptunium
  •  Neptunium Extraction Process 
  • Method Of Recovering Neptunium From Spent Nuclear Fuel
  • Separation Of Neptunium From Uranium
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