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Crystal structures of Eu(II) substituted barium magnesium fluorides: Ba0.78(3)Eu0.22(3)MgF4 and Ba5.20(6)Eu0.80(6)Mg7F26

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Published in Zeitschrift für Kristallographie. 1999, vol. 214, p. 139-142
Abstract Barium in BaMgF[4] and in Ba[6]Mg[7]F[26] can be partially replaced by Sr or Eu. The single crystal structural analysis of the title compounds (a = 409.06 pm, b = 1452.7 pm, c = 579.02 pm, space group Cmc2[1] for Ba[0.78(3)]Eu[0.22(3)]MgF[4] [Z = 2, R[w] = 0.023 for 998 reflections] and a = 583.47 pm, b = 1209.09 pm and c = 1506.56 pm, space group Immm for Ba[5.20(6)]Eu[0.80(6)]Mg[7]F[26]) MgF[4] [Z = 2, R[w] = 0.019 for 2694 reflections] confirms the substitution of barium by europium. A split refinement of the substituted barium site in both crystals reveals a trend of europium to get closer to the nearest fluoride neighbors by simultaneously reducing the coordination sphere.
Keywords Experimental studyXRDCrystal structureBarium fluoridesMagnesium fluoridesEuropium fluoridesIon substitutionChemical compositionInorganic compoundsRare earth compounds
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Structures
Research group Groupe Bill
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KUBEL, Frank, HAGEMANN, Hans-Rudolf, BILL, Hans. Crystal structures of Eu(II) substituted barium magnesium fluorides: Ba0.78(3)Eu0.22(3)MgF4 and Ba5.20(6)Eu0.80(6)Mg7F26. In: Zeitschrift für Kristallographie, 1999, vol. 214, p. 139-142. https://archive-ouverte.unige.ch/unige:3710

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Deposited on : 2009-10-06

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