Journal of Chemical Crystallography

, Volume 37, Issue 9, pp 601–608 | Cite as

Crystal Structure and Vibrational Spectra of Erbium Trisodium Bis(Cyclotriphosphate) Nonahydrate, ErNa3(P3O9)2 · 9H2O

  • Hassane Assaaoudi
  • Mostafa Ijjaali
  • Abdelaziz Ennaciri
  • Ian S. Butler
  • Janusz A. Kozinski
Original Paper


The cyclotriphosphate salt, ErNa3(P3O9)2 · 9H2O, has been characterized by single-crystal X-ray diffraction [hexagonal, space group \(\hbox{R}\bar{ 3}\hbox{c}\) , with unit cell parameters of a = b =  30.8451(14), c =  12.8063(8) Å; Z = 18]. The structure consists of alternating layers of [P3O9]3− groups, ErO8 dodecahedra, Na(1)O6 and Na(2)O7 polyhedra linked together by water molecules. The P3O9 rings are grouped along the c-axis in a P3O9–ErO8 arrangement thereby producing broad, hexagonal channels of diameter of 6.65 Å with a side dimension of 3.907 Å. The absence of coincidences for the majority of the IR and Raman bands observed for the cyclotriphosphate salt is in accord with the centrosymmetric structure of the material. The vibrational spectra have been interpreted on the basis of factor group effects.

Graphical abstract

We report the crystal structure and vibrational spectra of erbium trisodium bis(cyclotriphosphate)nanohydrate salt ErNa 3 (P 3 O 9 ) 2  · 9H 2 O

H. Assaaoudi, M. Ijjaali, A. Ennaciri, I. S. Butler* and J. A. Kozinski

Crystal structure and vibrational spectra of erbium trisodium bis(cyclotriphosphate) nonahydrate,ErNa3(P3O9)2 · 9H2O.

Projection of the coordination polyhedra of ErNa3(P3O9)2 · 9H2O down the c axis


Open framework structure Crystal structure ErNa3(P3O9)2 · 9H2Vibrational spectra 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Hassane Assaaoudi
    • 1
  • Mostafa Ijjaali
    • 2
  • Abdelaziz Ennaciri
    • 3
  • Ian S. Butler
    • 1
  • Janusz A. Kozinski
    • 4
  1. 1.Department of Chemistry, Otto Maass BuildingMcGill UniversityMontrealCanada
  2. 2.Faculté des Sciences et Techniques Fès SaissFesMorocco
  3. 3.Spectroscopy Laboratory, Department of ChemistryIbn Tofail UniversityKenitraMorocco
  4. 4.College of Engineering, Department of Chemical EngineeringUniversity of SaskatchewanSaskatoonCanada

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