Accession Number : ADA296931

Title :   The Crystal Structures of CeB4, ThB4, and UB4,

Corporate Author : ATOMIC ENERGY COMMISSION WASHINGTON DC

Personal Author(s) : Zalkin, Allan ; Templeton, D. H.

PDF Url : ADA296931

Report Date : 04 JAN 1950

Pagination or Media Count : 3

Abstract : The compounds CeB4, ThB4, and UB4 have been shown to crystallize in a new structure, which has been worked out from x-ray diffraction patterns. This structure is designated as the "ThB4-type structure," since that was the compound first observed. These borides were prepared by D. L. Sawyer and L. Brewer of this laboratory, who heated the metals and boron together in vacuum at about 1500 deg C. Powder diffraction patterns were obtained of the three compounds. Rotation and Weissenberg patterns were obtained for 110 and 001 axes of a small single crystal of ThB4. The patterns were indexed on tetragonal lattices whose dimensions are listed in Table 1. jg p.2

Descriptors :   *CRYSTAL STRUCTURE, *CERIUM, *URANIUM, *BORIDES, *THORIUM, METALS, POWDERS, X RAY DIFFRACTION, VACUUM, SINGLE CRYSTALS, DIFFRACTION, PATTERNS, BORON, ROTATION.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE