Accession Number : AD0285512

Title :   STUDIES IN CRYSTAL PREPARATION AND STRUCTURAL MECHANISMS FOR NEW PHYSICAL PROPERTIES OF SOLIDS

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK

Personal Author(s) : PEPINSKY,R.

Report Date : MAR 1962

Pagination or Media Count : 1

Abstract : Ferroelectric mechanism studies were concerned with the optical rotatory power phenomenon and other physial behaviors. Structural studies were made of highly-optical-absorbing organic crystals of the electron-donor electron-acceptor class, to determine whether some crystal-structural basis could be established for their electrical conductivity. The crystal structures of chloranil-pyrene and coronene-I2 were determined work on photoconductivity of these compounds was initiated. The possibility of molecular orientation of the imprisoned molecules in clathrate structures led to an examination of the dielectric behavior of certain clathrates. It was found that (quinol)3.MeOH shows a large dielectric peak in the neighborhood of 60 K. Order-disorder phenomena in ferroelectrics and antiferroelectrics were examined by the use of diffuse x-ray scattering. Interesting results were obtained for (glycine)3.H2SO4 and NaNO2. (Author)

Descriptors :   *FERROELECTRIC CRYSTALS, *FERROELECTRIC MATERIALS, *FERROELECTRICITY, ACOUSTICS, ANTIFERROELECTRICITY, COMPLEX COMPOUNDS, CRYSTAL DEFECTS, CRYSTAL STRUCTURE, CRYSTALS, DIELECTRICS, ELECTRICAL CONDUCTIVITY, LABORATORY EQUIPMENT, OPTICS, ORGANIC COMPOUNDS, PHASE STUDIES, PHOTOCONDUCTIVITY, POLARIZATION, RESONANCE, SALTS, SINGLE CRYSTALS, SOLID STATE PHYSICS, SULFATES, TARTRATES, X RAY DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE