Accession Number : AD0768963

Title :   Growth Twinning and Stacking Faults in Corundum.

Descriptive Note : Rept. for Jul 61-Jan 63,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF

Personal Author(s) : Chase,A. B. ; Stofel,E. ; Janowski,K.

Report Date : 29 OCT 1973

Pagination or Media Count : 30

Abstract : Several corundum crystals gorwn by the flux method were etched with hot KHSO4 and studied with an optical microscope. Examination showed a new form of line and pit pattern in addition to the more usual patterns formed by twin boundaries and dislocations. Several photographs and a simple model of atomic packing arrangement are presented to show that the new patterns probably are the result of stacking faults and partial dislocations. (Author)

Descriptors :   (*CORUNDUM, *TWINNING(CRYSTALLOGRAPHY)), DISLOCATIONS, CRYSTAL DEFECTS, DEFECTS(MATERIALS)

Subject Categories : Ceramics, Refractories and Glass
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE