| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Heymann, Gunter
Universität Innsbruck
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2023Tb2Co(B2O5)2 and Tb2Cu(B2O5)2 – two new borates with gadolinite-type structurescitations
- 2023Crystal structures and luminescence properties of Li6MN4:Ce3+ (M = Mo, W)
- 2019Serendipitous formation and characterization of K2[Pd(NO3)4]·2HNO3
- 2018Synthesis and characterization of the new tin borate SnB8O11(OH)4citations
- 2017The high-pressure phase of CePtAlcitations
- 2016Synthesis and characterization of the novel rare earth orthophosphates Y0.5Er0.5PO4 and Y0.5Yb0.5PO4citations
- 2016Hydrothermal synthesis of a new lead(II) borate (Pb4O)Pb2B6O14-IIcitations
- 2013Ce4Ag3Ge4O0.5 - chains of oxygen-centered OCe2Ce2/2] tetrahedra embedded in a CeAg3Ge4] intermetallic matrixcitations
- 2005High-Pressure Synthesis of a Gallium Oxonitride with a Spinel-Type Structurecitations
Places of action
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article
Synthesis and characterization of the novel rare earth orthophosphates Y0.5Er0.5PO4 and Y0.5Yb0.5PO4
Abstract
<jats:title>Abstract</jats:title><jats:p>The new mixed rare earth (RE) orthophosphates Y<jats:sub>0.5</jats:sub>Er<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> and Y<jats:sub>0.5</jats:sub>Yb<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> were synthesized by a classical solid state reaction in an electrical furnace at 1200 °C. As starting materials, the corresponding rare earth oxides and diammonium hydrogen phosphate were used. The powder diffraction analyses revealed that the new compounds Y<jats:sub>0.5</jats:sub>Er<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> and Y<jats:sub>0.5</jats:sub>Yb<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> crystallize in a zircon-type structure being isostructural with the rare earth orthophosphate YPO<jats:sub>4</jats:sub>. Y<jats:sub>0.5</jats:sub>Er<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> and Y<jats:sub>0.5</jats:sub>Yb<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> crystallize in the tetragonal space group <jats:italic>I</jats:italic>4<jats:sub>1</jats:sub>/<jats:italic>amd</jats:italic> (no. 141) with four formula units in the unit cell. The structural parameters based on Rietveld refinements are <jats:italic>a</jats:italic> = 687.27(2), <jats:italic>c</jats:italic> = 601.50(2) pm, <jats:italic>V</jats:italic> = 0.28412(1) nm<jats:sup>3</jats:sup>, <jats:italic>R</jats:italic><jats:sub>p</jats:sub>= 0.0143, and <jats:italic>R</jats:italic><jats:sub>wp</jats:sub> = 0.0186 (all data) for Y<jats:sub>0.5</jats:sub>Er<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> and <jats:italic>a</jats:italic> = 684.61(2), <jats:italic>c</jats:italic> = 599.31(2) pm, <jats:italic>V</jats:italic> = 0.28089(2) nm<jats:sup>3</jats:sup>, <jats:italic>R</jats:italic><jats:sub>p</jats:sub> = 0.0242, and <jats:italic>R</jats:italic><jats:sub>wp</jats:sub> = 0.0313 (all data) for Y<jats:sub>0.5</jats:sub>Yb<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub>. Furthermore, the structure of Y<jats:sub>0.5</jats:sub>Er<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> was refined from single-crystal X-ray diffraction data: <jats:italic>a</jats:italic> = 687.78(5), <jats:italic>c</jats:italic> = 601.85(4) pm, <jats:italic>V</jats:italic> = 0.28470(5) nm<jats:sup>3</jats:sup>, <jats:italic>R</jats:italic><jats:sub>1</jats:sub>= 0.0165, and <jats:italic>wR</jats:italic><jats:sub>2</jats:sub> = 0.0385 (all data). In both compounds, the rare earth metal ions are eightfold coordinated by oxygen atoms, forming two unique interlocking tetrahedra with two individual <jats:italic>RE</jats:italic>–O distances. The tetrahedral phosphate groups [PO<jats:sub>4</jats:sub>]<jats:sup>3–</jats:sup> are slightly distorted in both compounds. The individual rare earth ions share a common position (Wyckoff site 4<jats:italic>a</jats:italic>). The presence of two rare earth ions in the structures of the new orthophosphates Y<jats:sub>0.5</jats:sub>Er<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> and Y<jats:sub>0.5</jats:sub>Yb<jats:sub>0.5</jats:sub>PO<jats:sub>4</jats:sub> was additionally confirmed by single-crystal EDX spectroscopy revealing a ratio of 1:1.</jats:p>