Mineral Species containing Neptunium (Np)

**Neptunium (Np) Element Properties**
Atomic Mass	237.0482
Atomic Number	93
Name Origins	Named after the planet Neptune.
Year Discovered	1940
Discovery Credits	E. M. McMillan and P. Abelson at Berkeley, California, USA.
Remarks	Radioactive silvery metal which does not occur naturally. Attacked by oxygen, steam, and acids, but not alkalis.
References	Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also	WebElements, ChemiCool

Atomic Mass

237.0482

Atomic Number

93

Name Origins

Named after the planet Neptune.

Year Discovered

1940

Discovery Credits

E. M. McMillan and P. Abelson at Berkeley, California, USA.

Remarks

Radioactive silvery metal which does not occur naturally. Attacked by oxygen, steam, and acids, but not alkalis.

References

Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.

There are no minerals containing Neptunium (Np)