Accession Number:

AD0611197

Title:

THE STRUCTURE OF DIMOLYBDENUM CARBIDE BY NEUTRON DIFFRACTION TECHNIQUE,

Descriptive Note:

Corporate Author:

PENNSYLVANIA UNIV PHILADELPHIA SCHOOL OF METALLURGICAL ENGINEERING

Personal Author(s):

Report Date:

1962-01-01

Pagination or Media Count:

11.0

Abstract:

It is generally believed that Mo2C has either the hexagonal C6 Cadmium iodide anti-type structure or the related hexagonal L3 structure. A neutron diffraction study showed that this is not the case. Mo2C crystallizes with an orthorhombic unit cell with a 4.72 sub 4A, b 6.00 sub 4A, and c 5.19 sub 9A. The atomic arrangement of Mo2C presents a new structure type. Space group is D142h - Pbcn. Eight molybdenum atoms are in 8d with x 14, y 18, z 112 and four carbon atoms are in 4c with y 38. The carbon atoms in Mo2C arrange themselves in such a way, that each molybdenum atom has three nearly planar carbon neighbours. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE