Crystallization of BeO, Be2SiO4, and SiO2 from Li2MoO4-MoO3

reportActive / Technical Report | Accession Number: AD0742981 | Open PDF

Abstract:

Single crystals of phenacite Be2SiO4, bromelliteBeO, and tridymite SiO2 were grown from a MoO3-Li2MoO4 flux. Phenacite, with rhombohedral symmetry, grew in three distinct shapes. For most experiments the temperature was held constant at 1165C and the Li2MoO4MoO3 ratio at 116. The growth mechanism for crystallization was the evaporation of MoO3. Bromellite grew as a hemipyramidal crystal. Tridymite grew in small hexagonal plates when the BeOSiO2 ratio was less than 1.5. The effect of temperature, nucleation, and flux composition on crystal shape, twinning, and occurrence is discussed.

Author(s):
Osmer, Judith A. ; Chase, Armond B.
Author Organization(s):
AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
Descriptive Note:
Rept. for Jun-Sep 1971
Pagination:
0025

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-0172(9230-10)-11, SAMSO-TR-72-112
Contract/Grant Number(s):
F04701-71-C-0172
Monitor Series:
TR-72-112, SAMSO
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation; JCA_5_Command and Control
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*SILICON DIOXIDE, *CRYSTAL GROWTH, *BERYLLIUM OXIDES, *BERYLLIUM COMPOUNDS, OPTICAL MATERIALS, SILICATES, REFRACTORY MATERIALS, SYMMETRY(CRYSTALLOGRAPHY), MOLYBDATES, MINERALS, MOLYBDENUM COMPOUNDS, SINGLE CRYSTALS, SALTS
Field(s)/Group(s):
Crystallography
Keyword(s):
FUSED SALTS, TRIDYMITE
Report Date:
1972 Mar 01