CRYSTAL-STRUCTURE AND DIELECTRIC MEASUREMENTS OF MIXED CESIUM-AMMONIUM MERCURY-CHLORIDE - CS-0.7(NH4)(0.3)HGCL3

Authors
KABADOU A BENHASSEN R BENSALAH A JOUINI T
Citation
A. Kabadou et al., CRYSTAL-STRUCTURE AND DIELECTRIC MEASUREMENTS OF MIXED CESIUM-AMMONIUM MERCURY-CHLORIDE - CS-0.7(NH4)(0.3)HGCL3, Physica status solidi. b, Basic research, 208(2), 1998, pp. 387-395
Citations number
13
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. b, Basic research → ACNP
ISSN journal
03701972
Volume
208
Issue
2
Year of publication
1998
Pages
387 - 395
Database
ISI
SICI code
0370-1972(1998)208:2<387:CADMOM>2.0.ZU;2-V
Abstract
The title compound crystallises in the space group P3(2) and has the u nit cell dimensions a = 13.295(11) Angstrom, c = 9.419(8) Angstrom, V = 1441.82(2), Z = 9, D-exp = 4.17, D-calc = 4.153. The structure at ro om temperature is considered as distorted perovskite tentatively with R = 0.057 and WR2 = 0.153 for 700 observed reflections. The dielectric permittivity measured in the frequency and temperatures ranges 10(3) to 10(6) Hz and 307 to 613 K, respectively, reveals a transition at T = 449 K. Transport properties in this material appear to be due to the high mobility of NH4+ in the tunnels.