SYNTHESIS, CRYSTAL-STRUCTURE AND MAGNETIC-PROPERTIES OF K2MNP2O7

Authors
ELMAADI A BOUKHARI A HOLT EM FLANDROIS S
Citation
A. Elmaadi et al., SYNTHESIS, CRYSTAL-STRUCTURE AND MAGNETIC-PROPERTIES OF K2MNP2O7, Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre, 318(6), 1994, pp. 765-770
Citations number
11
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre → ACNP
ISSN journal
07644450
Volume
318
Issue
6
Year of publication
1994
Part
1
Pages
765 - 770
Database
ISI
SICI code
0764-4450(1994)318:6<765:SCAMOK>2.0.ZU;2-X
Abstract
Crystalline K2MnP2O7: monoclinic, P2(1)/n, a = 12.649(6), b = 5.527(2) , c = 9.571(3) angstrom, beta = 104.45(3)degrees, Z = 4, lambda MoK(al pha) = 0.71069 angstrom, R/R(w) = 4.1/5.4%, 869 obs. refl., shows a pa cking of PO4 and MnO6 polyhedra surrounding tunnels (parallel to the b axis) which contain the K+ ions. Mn2+ ions are found at the comers of planar networks of hexagons parallel to the crystallographic (100) pl ane. Magnetic measurements on powder (2-300 K) show a maximum chi(M) a t 2.6 K which could be associated with three-dimensional magnetic orde r.