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

Abstract

Single crystals of phenacite (Be2SiO4), bromellite(BeO), 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 Li2MoO4/MoO3 ratio at 1/16. The growth mechanism for crystallization was the evaporation of MoO3. Bromellite grew as a hemipyramidal crystal. Tridymite grew in small hexagonal plates when the BeO/SiO2 ratio was less than 1.5. The effect of temperature, nucleation, and flux composition on crystal shape, twinning, and occurrence is discussed.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1972
Accession Number
AD0742981

Entities

People

  • Armond B. Chase
  • Judith A. Osmer

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical
  • Counter WMD
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Aspect Ratio
  • Bricks
  • Chemistry
  • Crystal Growth
  • Crystallization
  • Crystals
  • High Temperature
  • Materials
  • Mechanics
  • Phase Diagrams
  • Single Crystals
  • Tectosilicates
  • Temperature Gradients
  • Transition Temperature
  • X Rays

Readers

  • Marine Propulsion Engineering and Naval Architecture
  • Materials Science and Engineering.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers