Published February 1, 1985 | Version v1
Journal article Metadata-only

Crystal chemistry and structure of Na2SO4(I) and its solid solutions

Creators

  • 1. Heidelberg Univ. (Germany, F.R.). Mineralogisch-Petrographisches Inst.
  • 2. Technische Hochschule Aachen (Germany, F.R.). Lehrstuhl und Inst. fuer Kristallographie

Description

In the high-temperature polymorph Na2SO4(I) up to 30% cation vacancies can be generated by substitution of Na+ by bi- and trivalent ions. Phase diagrams and lattice parameters of these solid solutions are presented. The hexagonal high-temperature form and its monoclinic distortions can be quenched to room temperature. A structure determination was carried out. The crystal structure is characterized by strong orientational disorder of the SO4 tetrahedra. The disorder, aliovalent solid solutions, thermal expansion and ionic conductivity are discussed. (orig./TWO)

Additional details

Publishing Information

Journal Title
Acta Crystallogr., Sect. B
Journal Volume
41
Journal Issue
1
Series
Acta Crystallogr., Sect. B.
Journal Page Range
5-11
ISSN
0567-7408
CODEN
ASBSD

INIS

Country of Publication
Denmark
Country of Input or Organization
Denmark
INIS RN
17009029
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CALCIUM SULFATES; DENSITY; HEXAGONAL LATTICES; LATTICE PARAMETERS; NICKEL SULFATES; PHASE DIAGRAMS; QUANTITY RATIO; QUENCHING; SODIUM SULFATES; SOLID SOLUTIONS; SPACE GROUPS; STRONTIUM SULFATES; VACANCIES; X-RAY DIFFRACTION; YTTRIUM SULFATES; ZINC SULFATES
Descriptors DEC
ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; COHERENT SCATTERING; CRYSTAL DEFECTS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIAGRAMS; DIFFRACTION; DISPERSIONS; HEAT TREATMENTS; HOMOGENEOUS MIXTURES; INFORMATION; MIXTURES; NICKEL COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POINT DEFECTS; SCATTERING; SODIUM COMPOUNDS; SOLUTIONS; STRONTIUM COMPOUNDS; SULFATES; SULFUR COMPOUNDS; SYMMETRY GROUPS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; ZINC COMPOUNDS