This work was supported by the Department of Energy through the Joint Program on Critical Compilation of Physical and Chemical
Data coordinated through the Office of Standard Reference Data, National Institute of Standards and Technology. Additional
support was contributed by: Molycorp Inc., Union Oil Co. of California, Los Angeles; Reactive Metals & Alloys Corp., West
Pittsburg, PA; Renson Metals Corp., Newark, NJ; and Santoku Metal Industry Co., Ltd., Kobe, Japan. Literature searched through
1983. Professor Gschneidner is the ASM/NIST Data Program Category Editor for binary rare-earth alloys.