Variation in crystal structure, ionic conductivity, and magnetic properties with the water uptake of a new hydrated sodium. beta. double prime ferrite

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(90)90032-S· OSTI ID:6387548

Nicolopoulos, S; Vincent, H; Anne, M ^[1]; Joubert, J C ^[2]

---

1. CNRS, Grenoble (France)
2. ENSPG, Saint Martin d'Heres (France)

The room temperature single-crystal x-ray data of Na{sub 1.5}(H{sub 3}O){sub 0.5}Fe{sub 10}ZnO{sub 17} + 0.3H{sub 2}O (hydrated sodium {beta}{double prime} alumina-like ferrite) were refined. The space group is R{anti 3}m and the hexagonal cell parameters are a = 5.940, c = 35.731 {angstrom}. Water molecules are localized in the conduction region and the total amount of absorbed water depends on hydration conditions, leading to different possible chemical compositions. By thermogravimetric methods the amount of the absorbed water could be measured. This compound is a poor ionic conductor in comparison with {beta}{minus}{double prime} aluminas. Two distinct types of magnetic behavior were observed for crystals of the same preparation, but in all cases water uptake leads to an enhancement of a ferromagnetic component.

• OSTI ID: 6387548
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 87:2; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALLOYS
CARBON ADDITIONS
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
FERRITE
HYDRATION
INFORMATION
IRON ALLOYS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
PHASE STUDIES
PHYSICAL PROPERTIES
SOLVATION