Co0.5TiOPO4

Crystal structure, magnetic and electrochemical properties

Rachid Essehli, Brahim El Bali, Helmut Ehrenberg, Ingrid Svoboda, Natalia Bramnik, Hartmut Fuess

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The new titanium oxyphosphate Co0.5TiPO5 has been prepared by solid state reaction. Its structure has been determined by single crystal X-ray diffraction and was further investigated by FT-IR spectroscopy and magnetic measurements. The compound crystallizes in the monoclinic system, S.G: P21/c [a = 7.358(1) Å, b = 7.378(2) Å, c = 7.383(3) Å, β = 119.66(3)°, Z = 4, R1 = 0.0142, wR2 = 0.0429]. The structure can be described as a network of very distorted TiO6 octahedra, in which the Ti4+ ions are displaced from the centres of the octahedra, and slightly distorted PO4 tetrahedra. Half of the octahedral cavities are occupied by Co atoms. The other half of octahedral sites is vacant and favourable for the electrochemical insertion of lithium. The insertion of lithium was studied by galvanostatic charging and discharging between different voltage limits.

Original languageEnglish
Pages (from-to)817-821
Number of pages5
JournalMaterials Research Bulletin
Volume44
Issue number4
DOIs
Publication statusPublished - 2 Apr 2009
Externally publishedYes

Fingerprint

Electrochemical properties
Lithium
insertion
Magnetic properties
lithium
Crystal structure
magnetic properties
crystal structure
Magnetic variables measurement
Titanium
Solid state reactions
tetrahedrons
magnetic measurement
charging
Infrared spectroscopy
titanium
Single crystals
Ions
solid state
X ray diffraction

Keywords

  • Crystal structure
  • IR-spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Co0.5TiOPO4 : Crystal structure, magnetic and electrochemical properties. / Essehli, Rachid; Bali, Brahim El; Ehrenberg, Helmut; Svoboda, Ingrid; Bramnik, Natalia; Fuess, Hartmut.

In: Materials Research Bulletin, Vol. 44, No. 4, 02.04.2009, p. 817-821.

Research output: Contribution to journalArticle

Essehli, Rachid ; Bali, Brahim El ; Ehrenberg, Helmut ; Svoboda, Ingrid ; Bramnik, Natalia ; Fuess, Hartmut. / Co0.5TiOPO4 : Crystal structure, magnetic and electrochemical properties. In: Materials Research Bulletin. 2009 ; Vol. 44, No. 4. pp. 817-821.
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