Accession Number:

AD0701376

Title:

HABIT CHANGES OF SAPPHIRE GROWN FROM PbO-PbF2 AND MoO3-PbF2 FLUXES.

Descriptive Note:

Rept. for Jul 67-Apr 68,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s):

• Chase,Armond B.
• Osmer,Judith A.

Report Date:

1969-10-10

Pagination or Media Count:

22.0

Abstract:

Single crystals of Al2O3 sapphire were grown from both PbO-PbF2 and MoO3-PbF2 fluxes. Their habits varied from flat plates PbF2-rich melts to equidimensional crystals PbO- or MoO3-rich melts. The primary growth planes on these crystals are basal planes 0001, first-order rhombs 10-11, and second-order rhombs 01-12. The habit change is interpreted on the basis of F1- crystal contamination and Pb2 surface adsorption. Possible ion species in the melt and their relative importance on crystal growth from these melt systems are discussed. Author

Descriptors:

• (*SAPPHIRE
• *CRYSTAL GROWTH)
• SINGLE CRYSTALS
• CRYSTAL STRUCTURE
• IMPURITIES
• SURFACE PROPERTIES
• ADSORPTION
• LEAD COMPOUNDS
• OXIDES
• FLUORIDES
• MOLYBDENUM COMPOUNDS

Subject Categories:

• Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE