Accession Number : AD0266618

Title :   CRYSTAL CHEMISTRY STUDIES

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK COLL OF MINERAL INDUSTRIES

Personal Author(s) : ROY,RUSTUM ; DATTA,R.

Report Date : 20 OCT 1961

Pagination or Media Count : 1

Abstract : The study revealed that order-disorder of both the normal inverse type as well as possible 1:3 ordering on the octahedral sites is a common phenomenon in spinel structure phases. The existence of an equilibrium second-order phase transition in these phases was established. The usefulness of X-ray diffraction intensities, absorption spectra in the visible and IR, and lattice parameters to characterize the degree of disorder was demonstrated. Work on the synthesis of new ferrimagnetic materials is directed to the study of phases present and relative stabilities of successive Te oxides under controlled oxygen pressures. The building of simple crystal growth equipment was started.

Descriptors :   *FERROELECTRIC CRYSTALS, *FERROELECTRIC MATERIALS, *GROUND POSITION INDICATORS, *PIEZOELECTRIC CRYSTALS, *SPINEL, ALUMINUM COMPOUNDS, CHROMIUM COMPOUNDS, COBALT COMPOUNDS, CRYSTAL LATTICES, CRYSTAL STRUCTURE, CRYSTALS, DIELECTRIC PROPERTIES, DIFFUSION, GALLIUM COMPOUNDS, GARNET, GERMANIUM COMPOUNDS, INFRARED SPECTROSCOPY, IONS, LITHIUM COMPOUNDS, MAGNESIUM COMPOUNDS, NICKEL COMPOUNDS, OXIDES, PHASE STUDIES, QUARTZ, SILICON COMPOUNDS, SINGLE CRYSTALS, SOLID STATE PHYSICS, TEMPERATURE, TITANIUM COMPOUNDS, X RAY DIFFRACTION, ZINC COMPOUNDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE