Document Details
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Title:
Identification and Crystal Structure of Neptunium Dioxide, NpO2
Author(s):
Zachariasen, W.H. [Univ. of Chicago, IL (United States)]
Document Type:
REPORT
Publication Date:
1944 Jun 22
Declassification Date:
1955 Jan 23
Declassification Status:
Declassified
Document Pages:
7 p.
Accession Number:
none
Document Number(s):
CN-1807
Originating Research Org.:
Chicago Operations Office, Argonne, IL (United States)
OpenNet Entry Date:
2017 Sep 29
OpenNet Modified Date:
2017 Oct 25
Description/Abstract:
A sample of neptunium oxide submitted by C.C. Cunningham has been definitely identified as NpO2. NpO2 is cubic face-centered with four molecules per unit cell. The lattice constant is a = 5.42A and the calculated density is 11.14. NpO2 has the fluorite type of structure. The crystal chemical significance of the results is discussed.