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:

1973-10-29

Pagination or Media Count:

30.0

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