Published May 16, 1989 | Version v1
Journal article Metadata-only

Calorimetric studies of the phase transition in ND4DSeO4 crystals

Creators

  • 1. Politechnika Wroclawska, Wroclaw (Poland)
  • 2. Moskovskij Gosudarstvennyj Univ., Moscow (USSR). Fizicheskij Fakul'tet

Description

In order to study the influence of deuteration on the physical properties and phase transitions in ND4DSeO4 (ADSe) crystals specific heat (Cp) measurements were carried out by the aid of a precise adiabatic calorimeter and a scanning microcalorimeter. Thermodynamic parameters of phase transitions for the polar modification and of the polymorphic (orthorhombic-monoclinic) transition between polar and non-polar modifications in AdSe crystals have been determined. A phase diagram [Cp = f (% D)] shows the regions of the ferroelectric, paraelectric, superionic and low temperature polar phases

Additional details

Publishing Information

Journal Title
Physica Status Solidi A
Journal Volume
113
Journal Issue
1
Series
Phys. Status Solidi A.
Journal Page Range
K31-K35
ISSN
0031-8965
CODEN
PSSAB

INIS

Country of Publication
Germany
Country of Input or Organization
German Democratic Republic
INIS RN
21005241
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S36: MATERIALS SCIENCE;
Descriptors DEI
AMMONIUM COMPOUNDS; CALORIMETRY; CRYSTAL-PHASE TRANSFORMATIONS; DEUTERIUM COMPOUNDS; IONIC CONDUCTIVITY; ISOTOPE EFFECTS; MONOCLINIC LATTICES; ORTHORHOMBIC LATTICES; PHASE DIAGRAMS; SELENATES; SPECIFIC HEAT; TEMPERATURE DEPENDENCE; TRANSITION HEAT
Descriptors DEC
CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIAGRAMS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ENTHALPY; HYDROGEN COMPOUNDS; INFORMATION; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; SELENIUM COMPOUNDS; THERMODYNAMIC PROPERTIES

Optional Information

Notes
Short note.