Accession Number : AD0258414

Title :   THE CRYSTAL STRUCTURE OF RU2SI

Corporate Author : UPPSALA UNIV (SWEDEN)

Personal Author(s) : ARONSSON,BERTIL ; ASELIUS,JAN

Report Date : 17 APR 1961

Pagination or Media Count : 1

Abstract : Alloys of Ru and Si were prepared by arc-melting or by sintering. By examining the powder photographs of the arc-melted alloys which had been allowed to cool rapidly in the arc furnace, it was found that alloys with nominal compositions ranging from RuSi.33 to RuSi.50 contained Ru and Ru2Si, while alloys RuSi.54 to RuSi.56 contained Ru2Si and an unknown phase (or phases) probably more Si-rich than Ru2Si. In the powder photograph of RuSi.52, only the powder lines of Ru2Si could be detected. The powder photographs ofALLOYS PREPARED BY SINTERING AT 1100 C were complex and no phase with the C23 structure was present in these alloys. An intermediate phase was observed in the Ru-Si system with a composition closely corresponding to the formula Ru2Si. The crystal structure of Ru2Si was refined from ingle crystal data until the difference synthesis did not display any gradients at the atomic positions. Structural data indicated that a is equal to 5.27 sub 9, b is equal to 4.00 sub 5, c is equal to 7.41 sub 8, and U is equal to 156.8 angstroms.

Descriptors :   *RUTHENIUM COMPOUNDS, *SILICIDES, ALLOYS, CRYSTAL STRUCTURE, CRYSTALS, INTERMETALLIC COMPOUNDS, PHASE STUDIES, POWDER ALLOYS, X RAY DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE