Accession Number : AD0688948

Title :   NEW MATERIALS FROM HIGH-PRESSURE HIGH-TEMPERATURE PROCESSES.

Descriptive Note : Final rept. 22 Apr 65-21 Apr 69,

Corporate Author : PENNWALT CORP KING OF PRUSSIA PA RESEARCH AND DEVELOPMENT DEPT

Personal Author(s) : Silverman,M. S. ; Chappell,W. H. , Jr. ; Soulen,J. R.

Report Date : MAY 1969

Pagination or Media Count : 5

Abstract : High-pressure (to 80 kbar) high-temperature (to 2500C.) synthesis work to obtain entirely novel chemical compositions and structures briefly is reviewed. Much of the work was devoted to identification and characterization of new sulfides and selenides, and determining the conditions under which these materials are formed. The crystal structure and superconducting behavior of a new high temperature polymorph of CaSi2 was investigated. (Author)

Descriptors :   (*SULFIDES, SYNTHESIS(CHEMISTRY)), (*SELENIDES, SYNTHESIS(CHEMISTRY)), (*SILICIDES, *SUPERCONDUCTORS), HIGH PRESSURE, HIGH TEMPERATURE, CALCIUM COMPOUNDS, CRYSTAL STRUCTURE

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE