Title of article :
Synthesis, structure and magnetic behaviour of mixed metal leucophosphite
Author/Authors :
Fa-Nian Shi، نويسنده , , Ant?nio Moreira dos Santos، نويسنده , , Lu?s Cunha-Silva، نويسنده , , Benilde F.O. Costa، نويسنده , , Jacek Klinowski، نويسنده , , Filipe A. Almeida Paz، نويسنده , , V?tor S. Amaral، نويسنده , , Joao Rocha، نويسنده , , Tito Trindade، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
A synthetic analogue of leucophosphite, an iron phosphate, was synthesized hydrothermally at 180 °C and its chemical composition determined to be {K[(FeV)(PO4)2(OH)(H2O)]·H2O}. The compound crystallizes in the monoclinic P21/c space group, with a=9.7210(19) Å, b=9.6500(19) Å, c=12.198(4) Å and β=128.569(18)°. While the original all-iron compound is reported to be antiferromagnetic, the inclusion of substitutional vanadium(III) ions renders the structure ferrimagnetic. Diffraction studies and magnetic characterization show that iron and vanadium are disordered throughout the crystallographic sites. The magnetic behaviour of this system was interpreted in terms of a classic ferrimagnetic mean field model, consisting of two antiferromagnetically coupled non-crystallographic “sublattices”.
Keywords :
Hydrothermal synthesis , Ferric phosphate , Vanadium , Leucophosphite , Magnetism
Journal title :
JOURNAL OF SOLID STATE CHEMISTRY
Journal title :
JOURNAL OF SOLID STATE CHEMISTRY