Crystal chemistry, single crystal X-ray structure and magnetism of nickel manganese pyrophosphate
Identifieur interne : 000F91 ( Main/Exploration ); précédent : 000F90; suivant : 000F92Crystal chemistry, single crystal X-ray structure and magnetism of nickel manganese pyrophosphate
Auteurs : K. Benkhouja [Maroc] ; M. Zahir [Maroc] ; A. Sadel [Maroc] ; A. Handizi [Maroc] ; A. Boukhari [Maroc] ; E. M. Holt [États-Unis] ; J. Aride [Maroc] ; M. Drillon [France]Source :
- Materials Research Bulletin [ 0025-5408 ] ; 1994.
Abstract
A study of the crystal chemistry of the Ni2 − xMnxP2O7 systems in powder form, 0 ≤ x ≤ 2, has revealed the existence of three solid solutions. When x < 0.10, the solution is isostructural with low temperature form, α-Ni2P2O7. When 0.10 ≤ x ≤ 0.40, the structure of the solid solution is similar to that of σ-Ni2P2O7. When 0.60 ≤ x ≤ 2, a form similar to β-Ni2P2O7 (or Mn2P2O7) is seen. The single crystal structure of material corresponding to x = 0.816 has been determined in monoclinic space group Cm, a = 6.557(3), b = 8.738(5), c = 4.498(3), β = 103.24(1) °, V = 240.6(2)Å3, Z = 2, R Rw = 3.8 5.3% and shows a structural deformation of the parent lattice. The system shows antiferromagnetic interactions at low temperature.
Url:
DOI: 10.1016/0025-5408(94)00106-5
Affiliations:
- France, Maroc, États-Unis
- Alsace (région administrative), Grand Est, Rabat-Salé-Kénitra
- Rabat, Strasbourg
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