Hydrothermal synthesis, structural and physico-chemical characterizations of two Nasicon phosphates: M{sub 0.50}{sup II}Ti{sub 2}(PO{sub 4}){sub 3} (M = Mn, Co)
Journal Article
·
· Materials Research Bulletin
- Laboratory of Mineral Solid and Analytical Chemistry 'LMSAC', Department of Chemistry, Faculty of Sciences, University Mohamed I, Po. Box 717, 60000 Oujda (Morocco)
- Laboratoire de Chimie des Materiaux Solides (LCMS) Universite HassanII-Mohammedia, Faculte des Sciences Ben M'Sik, Departement de Chimie, Casablanca (Morocco)
- Institute of Physics, Na Slovance 2, 182 21 Praha 8 (Czech Republic)
The family of titanium Nasicon-phosphates of generic formula M{sub 0.5}{sup II}Ti{sub 2}(PO{sub 4}){sub 3} has been revisited using hydrothermal techniques. Two phases have been synthesized: Mn{sub 0.5}{sup II}Ti{sub 2}(PO{sub 4}){sub 3} (MnTiP) and Co{sub 0.5}{sup II}Ti{sub 2}(PO{sub 4}){sub 3} (CoTiP). Single crystal diffraction studies show that they exhibit two different structural types. Mn{sub 0.5}{sup II}Ti{sub 2}(PO{sub 4}){sub 3} phosphate crystallizes in the R-3 space group, with the cell parameters a = 8.51300(10) A and c = 21.0083(3) A (V = 1318.52(3) A{sup 3} and Z = 6). The Co{sub 0.5}{sup II}Ti{sub 2}(PO{sub 4}){sub 3} phosphate crystallizes in the R-3c space group, with a = 8.4608(9) A and c = 21.174(2) A (V = 1312.7(2) A{sup 3} and Z = 6). These two compounds are clearly related to the parent Nasicon-type rhombohedral structure, which can be described using [Ti{sub 2}(PO{sub 4}){sub 3}] framework composed of two [TiO{sub 6}] octahedral interlinked via three [PO{sub 4}] tetrahedra. {sup 31}P 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.
- OSTI ID:
- 22029803
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 7 Vol. 44; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis, structure and characterisation of Fe{sub 0.50}Ti{sub 2}(PO{sub 4}){sub 3}: A new material with Nasicon-like structure
Synthesis, structure and magnetic properties of new phosphates K{sub 2}Mn{sub 0.5}Ti{sub 1.5}(PO{sub 4}){sub 3} and K{sub 2}Co{sub 0.5}Ti{sub 1.5}(PO{sub 4}){sub 3} with the langbeinite structure
Equilibrium relations in the system TiO{sub 2}/V{sub 2}O{sub 5}/P{sub 2}O{sub 5} and crystal structure of a NASICON-related vanadyl(V) titanium(IV) phosphate
Journal Article
·
Sun Jul 15 00:00:00 EDT 2007
· Journal of Solid State Chemistry
·
OSTI ID:21015866
Synthesis, structure and magnetic properties of new phosphates K{sub 2}Mn{sub 0.5}Ti{sub 1.5}(PO{sub 4}){sub 3} and K{sub 2}Co{sub 0.5}Ti{sub 1.5}(PO{sub 4}){sub 3} with the langbeinite structure
Journal Article
·
Tue Nov 14 23:00:00 EST 2006
· Journal of Solid State Chemistry
·
OSTI ID:20900887
Equilibrium relations in the system TiO{sub 2}/V{sub 2}O{sub 5}/P{sub 2}O{sub 5} and crystal structure of a NASICON-related vanadyl(V) titanium(IV) phosphate
Journal Article
·
Fri Dec 14 23:00:00 EST 2012
· Journal of Solid State Chemistry
·
OSTI ID:22149983