Hydrothermal synthesis, structural and physico-chemical characterizations of two Nasicon phosphates: M0.50                         IITi2(PO4)3 (M = Mn, Co)

Rachid Essehli; Brahim El Bali; S. Benmokhtar; Karla Fejfarová; Michal Dusek

doi:10.1016/j.materresbull.2009.02.013

Hydrothermal synthesis, structural and physico-chemical characterizations of two Nasicon phosphates: M_0.50 ^IITi₂(PO₄)₃ (M = Mn, Co)

Rachid Essehli, Brahim El Bali, S. Benmokhtar, Karla Fejfarová, Michal Dusek

Research output: Contribution to journal › Article › peer-review

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Abstract

The family of titanium Nasicon-phosphates of generic formula M_0.5 ^IITi₂(PO₄)₃ has been revisited using hydrothermal techniques. Two phases have been synthesized: Mn_0.5 ^IITi₂(PO₄)₃ (MnTiP) and Co_0.5 ^IITi₂(PO₄)₃ (CoTiP). Single crystal diffraction studies show that they exhibit two different structural types. Mn_0.5 ^IITi₂(PO₄)₃ phosphate crystallizes in the R-3 space group, with the cell parameters a = 8.51300(10) Å and c = 21.0083(3) Å (V = 1318.52(3) Å³ and Z = 6). The Co_0.5 ^IITi₂(PO₄)₃ phosphate crystallizes in the R-3c space group, with a = 8.4608(9) Å and c = 21.174(2) Å (V = 1312.7(2) Å³ and Z = 6). These two compounds are clearly related to the parent Nasicon-type rhombohedral structure, which can be described using [Ti₂(PO₄)₃] framework composed of two [TiO₆] octahedral interlinked via three [PO₄] tetrahedra. ³¹P magic-angle spinning nuclear magnetic resonance (MAS-NMR) data are presented as supporting data. Curie-Weiss-type behavior is observed in the magnetic susceptibility. The phases are also characterized by IR spectroscopy and UV-visible.

Original language	English
Pages (from-to)	1502-1510
Number of pages	9
Journal	Materials Research Bulletin
Volume	44
Issue number	7
DOIs	https://doi.org/10.1016/j.materresbull.2009.02.013
State	Published - Jul 1 2009
Externally published	Yes

Funding

We acknowledge the grant Ag only of the Czech Republic for grant No. 202/06/0757 and Rachid Essehli gratefully thanks the Institut Darmstadt and particularly Prof H. Fuess, S. Ingrid.

Funders	Funder number
Ag only of the Czech Republic	202/06/0757
Institut Darmstadt

Keywords

D: Crystal structure

Access to Document

10.1016/j.materresbull.2009.02.013

Cite this

@article{5b64610097694a038835fccf40afcab9,

title = "Hydrothermal synthesis, structural and physico-chemical characterizations of two Nasicon phosphates: M0.50 IITi2(PO4)3 (M = Mn, Co)",

abstract = "The family of titanium Nasicon-phosphates of generic formula M0.5 IITi2(PO4)3 has been revisited using hydrothermal techniques. Two phases have been synthesized: Mn0.5 IITi2(PO4)3 (MnTiP) and Co0.5 IITi2(PO4)3 (CoTiP). Single crystal diffraction studies show that they exhibit two different structural types. Mn0.5 IITi2(PO4)3 phosphate crystallizes in the R-3 space group, with the cell parameters a = 8.51300(10) {\AA} and c = 21.0083(3) {\AA} (V = 1318.52(3) {\AA}3 and Z = 6). The Co0.5 IITi2(PO4)3 phosphate crystallizes in the R-3c space group, with a = 8.4608(9) {\AA} and c = 21.174(2) {\AA} (V = 1312.7(2) {\AA}3 and Z = 6). These two compounds are clearly related to the parent Nasicon-type rhombohedral structure, which can be described using [Ti2(PO4)3] framework composed of two [TiO6] octahedral interlinked via three [PO4] tetrahedra. 31P magic-angle spinning nuclear magnetic resonance (MAS-NMR) data are presented as supporting data. Curie-Weiss-type behavior is observed in the magnetic susceptibility. The phases are also characterized by IR spectroscopy and UV-visible.",

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T2 - M0.50 IITi2(PO4)3 (M = Mn, Co)

AU - Essehli, Rachid

AU - Bali, Brahim El

AU - Benmokhtar, S.

AU - Fejfarová, Karla

AU - Dusek, Michal

PY - 2009/7/1

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N2 - The family of titanium Nasicon-phosphates of generic formula M0.5 IITi2(PO4)3 has been revisited using hydrothermal techniques. Two phases have been synthesized: Mn0.5 IITi2(PO4)3 (MnTiP) and Co0.5 IITi2(PO4)3 (CoTiP). Single crystal diffraction studies show that they exhibit two different structural types. Mn0.5 IITi2(PO4)3 phosphate crystallizes in the R-3 space group, with the cell parameters a = 8.51300(10) Å and c = 21.0083(3) Å (V = 1318.52(3) Å3 and Z = 6). The Co0.5 IITi2(PO4)3 phosphate crystallizes in the R-3c space group, with a = 8.4608(9) Å and c = 21.174(2) Å (V = 1312.7(2) Å3 and Z = 6). These two compounds are clearly related to the parent Nasicon-type rhombohedral structure, which can be described using [Ti2(PO4)3] framework composed of two [TiO6] octahedral interlinked via three [PO4] tetrahedra. 31P magic-angle spinning nuclear magnetic resonance (MAS-NMR) data are presented as supporting data. Curie-Weiss-type behavior is observed in the magnetic susceptibility. The phases are also characterized by IR spectroscopy and UV-visible.

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