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Title

Synthesis and crystal structures of Ba6Mg11F34 and the solid solutions Ba6Mg11-xM(II)xF34 (M(II)=Mn,Fe)and luminescence of Ba6Mg11F34:Eu2+

Authors
Kerbe, W.
Weil, M.
Published in Materials Research Bulletin. 2004, vol. 39, no. 3, p. 343-355
Abstract Ba[6]Mg[11]F[34], a new compound of the pseudobinary BaF[2]–MgF[2] system, has been synthesized by solid state techniques from stoichiometric amounts of BaF[2] and MgF[2] and its crystal structure determined by single crystal X-ray diffraction (space group P1,a=7.5084(6), b=9.9192(8), c=10.0354(8) Å, α=81.563(2), β=72.402(2), γ=71.198(1)°, 3899 structure factors, 233 parameters, R(F[2]>2σ(F[2]))=0.018, wR(F[2] all) = 0.046). It is isotypic with the copper(II) analogue, Ba[6]Cu[11]F[34]. The main features of the structure are a network of [MgF[6]] octahedra and three different [BaF[x]] polyhedra with x=12, 11+1 and 13. Ba[6]Mg[11−x]Fe[x]F[34] and Ba[6]Mg[11−x]Mn[x]F[34] solid solutions were prepared and their composition determined by single crystal structure analyses. The luminescence properties of Ba[6]Mg[11]F[34] doped with Eu[2+] were studied using fluorescence spectroscopy. The observed luminescence was pale blue with a maximum at 465 nm.
Keywords FluoridesX-ray diffractionCrystal structureLuminescence
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Research group Groupe Hagemann
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KERBE, W. et al. Synthesis and crystal structures of Ba6Mg11F34 and the solid solutions Ba6Mg11-xM(II)xF34 (M(II)=Mn,Fe)and luminescence of Ba6Mg11F34:Eu2+. In: Materials Research Bulletin, 2004, vol. 39, n° 3, p. 343-355. https://archive-ouverte.unige.ch/unige:3707

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Deposited on : 2009-10-06

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