Study concerns crystal structures and lattice parameters for a number of new intermetallic compounds. Crystal structure data have been collected on equiatomic compounds, formed between an element of the Sc, Ti, V, or Cr group and an element of the Co or Ni group. The data, obtained by conventional methods, are presented in an easily usable tabular form

Conner, R. A., Jr.

Downey, J. W.

Dwight, A. E.

English

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AEC-NASA TECH BRIEF 
ICY C 
TES
June 1968
	
Brief 68-10198 
AEC-NASA Tech Briefs describe innovations resulting from the research and development program 
of the U.S. AEC or from AEC-NASA interagency efforts. They are issued to encourage commercial 
application. Tech Briefs are published by NASA and may be purchased, at 15 cents each, from 
the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 	 - 
Crystal Structure Analysis of Intermetallic Compounds 
.
A continuing study on the alloy chemistry of the 
transition elements concerns crystal structures and 
lattice parameters for a number of new intermetallic 
compounds. Crystal structure data have been collected 
on equiatomic compounds, formed between an ele-
ment of the Sc, Ti, V, or Cr group and an element of 
the Co or Ni group. The data, obtained by conven-
tional methods,, are presented in an easily usable 
tabular form. Representatives of the orthorhombic 
B19, Bf , and B27 structures and the cubic B2 struc-
tures have been found and confirmed. 
The study has been published as "Equiatomic Com-
pounds of the Transition and Lanthanide Elements with 
Rh, Ir, Ni and Pt," by A. E. Dwight, R. A. Conner, Jr., 
and J. W. Downey, Argonne National Laboratory, 
which is published in Ada Crystallographica, (1965) 
vol. 18, p.. 835. This report includes experimental 
procedures, results and discussion, and the following 
tables: 
(I) Lattice parameters of equiatomic compounds. 
The table covers 59 alloys, their type, structure, 
and metallographic observations. 
(2) Calculated and observed d spacings and intensi-
ties for TiPt. 
(3) Calculated and observed d spacings and intensi-
ties for GdNi. 
(4) Calculated and observed d spacings and intensi-
ties for LuNi. 
(5) Observed and calculated values of d spacings 
and intensities for Holr. 
The alloys were prepared by arc melting on a water-
cooled copper hearth under argon atmosphere. The 
arc-melted buttons were homogenized in evacuated 
capsules at temperatures approximately below their 
melting points. Powder specimens for X-ray dif -
fraction were then prepared and heat treated at the 
same temperature of homogenation.
X-ray powder photographs were taken with CrKa 
or Cuka radiation and a powder camera. The lattice 
parameters for patterns showing a bc cubic structure 
were obtained by an extrapolation method. For pat-
terns showing an orthorhombic structure, indices were 
obtained by the use of Battelle Indexing Charts. A 
computer was used to calculate d spacings, for con3- 
parison with observed d spacings, and to calculate F 
Intensity calculations were made to verify the assign-
ment of indices. 
Notes: 
I. This information should be of interest to metal-
lurgists and crystallographers working with new 
metal alloys. 
2. Inquiries concerning this innovation may be di-
rected to:
Office of Industrial Cooperation 
Argonne National Laboratory 
9700 South Cass Avenue 
Argonne, Illinois 60439 
Reference: B68-10198 
Source: A. E. Dwight, R. A. Conner, Jr., 
and J. W. Downey
Metallurgy Division
(A RG- 10092) 
Patent status: 
Inquiries about obtaining rights for commercial 
use of this innovation may be directed to: 
Mr. George H. Lee, Chief 
Chicago Patent Group 
U.S. Atomic Energy Commission 
Chicago Operations Office 
9800 South Cass Avenue 
Argonne, Illinois 60439
Category 03 
This document was prepared under the sponsorship of the Atomic 
Energy Commission and/or the National Aeronautics and Space 
Administration. Neither the United States Government nor any per-
son acting on behalf of the United States Government assumes any
liability resulting from the use of the information contained in this 
document, or warrants that the use of any information, apparatus, 
method, or process disclosed in this document may not infringe pri-
vately owned rights.
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Crystal structure analysis of intermetallic compounds

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