Accession Number:

AD0613474

Title:

THE CRYSTAL STRUCTURE OF YB4,

Descriptive Note:

Corporate Author:

CARBORUNDUM CO NIAGARA FALLS N Y

Report Date:

1965-03-01

Pagination or Media Count:

18.0

Abstract:

A structure determination of YB4 was carried out in order to determine the boron positions in metal tetraborides. The structure proposed by earlier workers using the ThB4 was confirmed however, significant departures in occupany of boron positions were noted. One boron position B III was found to be about 25 defective. As a consequence, each octahedral boron group is on the average one atom short. This argues against the earlier proposed structure interpretation based on a continuous framework of boron atoms. A new crystal chemical interpretation of the tetraboride structure is presented in terms of tetrahedral units which demonstrates a structural framework common to MB4, M3B2, and M2B type compounds. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE