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Crystal Structure, Vibrational Spectra and Activation of BaCa(P 4 O 12 ) with Eu 2+ Compared with β‐Sr(PO 3 ) 2 :Eu
Author(s) -
Höppe Henning A.,
Panzer J. Michel U.
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900098
Subject(s) - chemistry , phosphor , crystal structure , crystallography , luminescence , excited state , crystal (programming language) , emission spectrum , spectroscopy , doping , spectral line , atomic physics , physics , optics , programming language , optoelectronics , astronomy , computer science , quantum mechanics
The polyphosphates β‐Sr(PO 3 ) 2 and BaCa(PO 3 ) 4 were doped with Eu 2+ , BaCa(PO 3 ) 4 was structurally characterised for the first time. Both phosphors were analysed by fluorescence spectroscopy. β‐Sr(PO 3 ) 2 :Eu and BaCa(PO 3 ) 4 :Eu were found to emit blue light at 424 nm and 418 nm, respectively, with a broader emission band compared with α‐Sr(PO 3 ) 2 :Eu. Both phosphors can be excited at 330 nm, i.e. an UV‐LED emission. The crystal structure of BaCa(PO 3 ) 4 has been determined based on single‐crystal data [ P 2 1 / n , Z = 4, a = 723.00(11), b = 917.05(19), c = 1524.7(2) pm, β = 90.995(12)°, R1 = 0.050, wR2 = 0.099, 1748 reflections, 164 parameters]. BaCa(PO 3 ) 4 is not homeotypic with β‐Sr(PO 3 ) 2 and α‐Sr(PO 3 ) 2 but isotypic with BaCd(PO 3 ) 4 . The vibrational spectra of BaCa(PO 3 ) 4 are also presented and discussed. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)