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Neptunium is a hard metal, having a bulk modulus of 118 GPa, comparable to that of manganese. [9] Neptunium metal is similar to uranium in terms of physical workability. When exposed to air at normal temperatures, it forms a thin oxide layer. This reaction proceeds more rapidly as the temperature increases. [8]
Neptunium chalcogen and pnictogen compounds have been well studied primarily as part of research into their electronic and magnetic properties and their interactions in the natural environment. Pnictide and carbide compounds have also attracted interest because of their presence in the fuel of several advanced nuclear reactor designs, although ...
Physical properties; Phase at ... Spectral lines of neptunium: Other properties; Natural occurrence: from decay: Crystal structure
Neptunium(IV) phosphide is a binary inorganic compound of neptunium metal and phosphorus with the chemical formula Np 3 P 4. [1] Preparation ... Physical properties
Neptunium arsenide is a binary inorganic compound of neptunium and arsenic with the chemical formula NpAs. [1] The compound forms crystals. ... Physical properties
Physical properties. Neptunium tetrabromide forms red-brown hygroscopic crystals of monoclinic crystal system, spatial group P 2/c, [7] [8] ...
Neptunium(IV) nitrate is an inorganic compound, a salt of neptunium and nitric acid with the chemical formula Np(NO 3) 4. ... Physical properties. Neptunium ...
Neptunium (IV) oxalate [1] is an inorganic compound, a salt of neptunium and oxalic acid with the chemical formula Np(C 2 O 4) 2. [2] The compound is slightly soluble in water, forms crystalline hydrates—green crystals.