AErF 2O 7 (A = Rb, Cs) and HEuP 2O 7·3H 2O

Crystal structures, vibrational studies and thermal behaviours

Rachid Essehli, A. Lamhamdi, A. Tahiri Alaoui, B. El Bali, E. Mejdoubi, M. Lachkar, M. Dusek, K. Fejfarova

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

New diphosphates AErP 2O 7, A = Rb (1), Cs (2), and HEuP 2O 7·3H 2O (3) have been prepared via soft chemistry route from evaporation of aqueous solution. Their crystal structures have been solved by single crystal diffraction data. The compounds (1) and (2) crystallize in the monoclinic space group P2 1/c with the following unit cell dimensions: (1) a = 7.7248(4) Å, b = 10.9342(6) Å, c = 8.6716(3) Å, β = 105.434(4)° and Z = 4; (2) a = 7.9192(4) Å, b = 10.8606(4) Å, c = 8.7684(5) Å, β = 104.317(5)° and Z = 4. Compound (3) crystallises in the triclinic space group P - 1, with the unit cell parameters: a = 6.4036(5) Å, b = 6.8753(6) Å, c = 9.7964(8) Å, α = 81.706(7)°, β = 80.218(7)°, γ = 88.381(7)°. Crystal structure of (1) and (2) consists of 3D open framework built from [ErO 6] octahedra sharing corners with [P 2O 7] units, leading to the formation of channels running along c direction in which A + [A = Rb(1), Cs(2)] ions are located. The compound (3), on the other hand, exhibits a lamellar structure, in which edge-sharing polyhedra of eightfold coordinated europium form chains along [010]. These chains are joined in turn to each others using diphosphates bridges. A network of O-H...O hydrogen bonds reinforces the cohesion of the structure of (3). The diphosphate groups in (1), (2) and (3) adopts an eclipsed configuration. IR and Raman spectra of the three new phosphates show usual signals related to the P2O7 diphosphate group and the water molecule. TG and DTA studies were carried out on crystals of (3). The data are correlated to the crystal structures ones.

Original languageEnglish
Pages (from-to)475-485
Number of pages11
JournalJournal of Chemical Crystallography
Volume42
Issue number5
DOIs
Publication statusPublished - May 2012
Externally publishedYes

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diphosphates
Diphosphates
Crystal structure
crystal structure
Europium
Lamellar structures
cohesion
europium
polyhedrons
cells
Differential thermal analysis
Raman scattering
Hydrogen bonds
phosphates
thermal analysis
Evaporation
Diffraction
Phosphates
routes
evaporation

Keywords

  • Caesium
  • Crystal structure
  • Diphosphates
  • Erbium
  • Europium
  • IR and Raman
  • Rubidium
  • TG and TDA
  • X-ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

AErF 2O 7 (A = Rb, Cs) and HEuP 2O 7·3H 2O : Crystal structures, vibrational studies and thermal behaviours. / Essehli, Rachid; Lamhamdi, A.; Alaoui, A. Tahiri; El Bali, B.; Mejdoubi, E.; Lachkar, M.; Dusek, M.; Fejfarova, K.

In: Journal of Chemical Crystallography, Vol. 42, No. 5, 05.2012, p. 475-485.

Research output: Contribution to journalArticle

Essehli, R, Lamhamdi, A, Alaoui, AT, El Bali, B, Mejdoubi, E, Lachkar, M, Dusek, M & Fejfarova, K 2012, 'AErF 2O 7 (A = Rb, Cs) and HEuP 2O 7·3H 2O: Crystal structures, vibrational studies and thermal behaviours', Journal of Chemical Crystallography, vol. 42, no. 5, pp. 475-485. https://doi.org/10.1007/s10870-011-0272-7
Essehli, Rachid ; Lamhamdi, A. ; Alaoui, A. Tahiri ; El Bali, B. ; Mejdoubi, E. ; Lachkar, M. ; Dusek, M. ; Fejfarova, K. / AErF 2O 7 (A = Rb, Cs) and HEuP 2O 7·3H 2O : Crystal structures, vibrational studies and thermal behaviours. In: Journal of Chemical Crystallography. 2012 ; Vol. 42, No. 5. pp. 475-485.
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title = "AErF 2O 7 (A = Rb, Cs) and HEuP 2O 7·3H 2O: Crystal structures, vibrational studies and thermal behaviours",
abstract = "New diphosphates AErP 2O 7, A = Rb (1), Cs (2), and HEuP 2O 7·3H 2O (3) have been prepared via soft chemistry route from evaporation of aqueous solution. Their crystal structures have been solved by single crystal diffraction data. The compounds (1) and (2) crystallize in the monoclinic space group P2 1/c with the following unit cell dimensions: (1) a = 7.7248(4) {\AA}, b = 10.9342(6) {\AA}, c = 8.6716(3) {\AA}, β = 105.434(4)° and Z = 4; (2) a = 7.9192(4) {\AA}, b = 10.8606(4) {\AA}, c = 8.7684(5) {\AA}, β = 104.317(5)° and Z = 4. Compound (3) crystallises in the triclinic space group P - 1, with the unit cell parameters: a = 6.4036(5) {\AA}, b = 6.8753(6) {\AA}, c = 9.7964(8) {\AA}, α = 81.706(7)°, β = 80.218(7)°, γ = 88.381(7)°. Crystal structure of (1) and (2) consists of 3D open framework built from [ErO 6] octahedra sharing corners with [P 2O 7] units, leading to the formation of channels running along c direction in which A + [A = Rb(1), Cs(2)] ions are located. The compound (3), on the other hand, exhibits a lamellar structure, in which edge-sharing polyhedra of eightfold coordinated europium form chains along [010]. These chains are joined in turn to each others using diphosphates bridges. A network of O-H...O hydrogen bonds reinforces the cohesion of the structure of (3). The diphosphate groups in (1), (2) and (3) adopts an eclipsed configuration. IR and Raman spectra of the three new phosphates show usual signals related to the P2O7 diphosphate group and the water molecule. TG and DTA studies were carried out on crystals of (3). The data are correlated to the crystal structures ones.",
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T1 - AErF 2O 7 (A = Rb, Cs) and HEuP 2O 7·3H 2O

T2 - Crystal structures, vibrational studies and thermal behaviours

AU - Essehli, Rachid

AU - Lamhamdi, A.

AU - Alaoui, A. Tahiri

AU - El Bali, B.

AU - Mejdoubi, E.

AU - Lachkar, M.

AU - Dusek, M.

AU - Fejfarova, K.

PY - 2012/5

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N2 - New diphosphates AErP 2O 7, A = Rb (1), Cs (2), and HEuP 2O 7·3H 2O (3) have been prepared via soft chemistry route from evaporation of aqueous solution. Their crystal structures have been solved by single crystal diffraction data. The compounds (1) and (2) crystallize in the monoclinic space group P2 1/c with the following unit cell dimensions: (1) a = 7.7248(4) Å, b = 10.9342(6) Å, c = 8.6716(3) Å, β = 105.434(4)° and Z = 4; (2) a = 7.9192(4) Å, b = 10.8606(4) Å, c = 8.7684(5) Å, β = 104.317(5)° and Z = 4. Compound (3) crystallises in the triclinic space group P - 1, with the unit cell parameters: a = 6.4036(5) Å, b = 6.8753(6) Å, c = 9.7964(8) Å, α = 81.706(7)°, β = 80.218(7)°, γ = 88.381(7)°. Crystal structure of (1) and (2) consists of 3D open framework built from [ErO 6] octahedra sharing corners with [P 2O 7] units, leading to the formation of channels running along c direction in which A + [A = Rb(1), Cs(2)] ions are located. The compound (3), on the other hand, exhibits a lamellar structure, in which edge-sharing polyhedra of eightfold coordinated europium form chains along [010]. These chains are joined in turn to each others using diphosphates bridges. A network of O-H...O hydrogen bonds reinforces the cohesion of the structure of (3). The diphosphate groups in (1), (2) and (3) adopts an eclipsed configuration. IR and Raman spectra of the three new phosphates show usual signals related to the P2O7 diphosphate group and the water molecule. TG and DTA studies were carried out on crystals of (3). The data are correlated to the crystal structures ones.

AB - New diphosphates AErP 2O 7, A = Rb (1), Cs (2), and HEuP 2O 7·3H 2O (3) have been prepared via soft chemistry route from evaporation of aqueous solution. Their crystal structures have been solved by single crystal diffraction data. The compounds (1) and (2) crystallize in the monoclinic space group P2 1/c with the following unit cell dimensions: (1) a = 7.7248(4) Å, b = 10.9342(6) Å, c = 8.6716(3) Å, β = 105.434(4)° and Z = 4; (2) a = 7.9192(4) Å, b = 10.8606(4) Å, c = 8.7684(5) Å, β = 104.317(5)° and Z = 4. Compound (3) crystallises in the triclinic space group P - 1, with the unit cell parameters: a = 6.4036(5) Å, b = 6.8753(6) Å, c = 9.7964(8) Å, α = 81.706(7)°, β = 80.218(7)°, γ = 88.381(7)°. Crystal structure of (1) and (2) consists of 3D open framework built from [ErO 6] octahedra sharing corners with [P 2O 7] units, leading to the formation of channels running along c direction in which A + [A = Rb(1), Cs(2)] ions are located. The compound (3), on the other hand, exhibits a lamellar structure, in which edge-sharing polyhedra of eightfold coordinated europium form chains along [010]. These chains are joined in turn to each others using diphosphates bridges. A network of O-H...O hydrogen bonds reinforces the cohesion of the structure of (3). The diphosphate groups in (1), (2) and (3) adopts an eclipsed configuration. IR and Raman spectra of the three new phosphates show usual signals related to the P2O7 diphosphate group and the water molecule. TG and DTA studies were carried out on crystals of (3). The data are correlated to the crystal structures ones.

KW - Caesium

KW - Crystal structure

KW - Diphosphates

KW - Erbium

KW - Europium

KW - IR and Raman

KW - Rubidium

KW - TG and TDA

KW - X-ray diffraction

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