| 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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Grin, Yuri
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2022FeWO 4 Single Crystals: Structure, Oxidation States, and Magnetic and Transport Propertiescitations
- 2021Thermoelectric characterization of the clathrate-I solid solution Ba 8−δ Au x Ge 46−xcitations
- 2020Synthesis of plasmonic Fe/Al nanoparticles in ionic liquidscitations
- 2019Complex magnetic phase diagram of metamagnetic MnPtSi
- 2019Complex magnetic phase diagram of metamagnetic MnPtSi.citations
- 2018Local magnetism in MnSiPt rules the chemical bondcitations
- 2017Enhancement of the Thermoelectric Properties of FeGa3-type Structures with Group 6 Transition Metals: A Computational Explorationcitations
- 2014Ca3Pt4+xGe13−y and Yb3Pt4Ge13: new derivatives of the Pr3Rh4Sn13 structure typecitations
- 2013TiGePt – a study of Friedel differencescitations
- 2013New Monoclinic Phase at the Composition Cu2SnSe3 and Its Thermoelectric Propertiescitations
- 2012Synthesis, Crystal Structure, and Physical Properties of the Type-I Clathrate Ba 8−δ Ni x □ y Si 46–x–ycitations
- 2012Surface investigation of intermetallic PdGa(1̅ 1̅ 1̅)citations
- 2012How to control the selectivity of palladium-based catalysts in hydrogenation reactions: the role of subsurface chemistrycitations
- 2011Refinement of the crystal structure of K8Ge44 square(2), an intermetallic clathrate Icitations
- 2011Nanostructuring of Ba8Ga16Ge30 clathrates
- 2011Structure of the orthorhombic Al13Co4(100) surface using LEED, STM and ab initio studiescitations
- 2010Physical properties of single-crystalline Ba 8 Ni 3.5 Ge 42.1 h 0.4citations
- 2010Crystal structure and transport properties of Ba 8 Ge 43 □ 3citations
- 2010ChemInform Abstract: EuGa2.+-.xGe4.+-.x: Preparation, Crystal Chemistry and Properties.
- 2010Valence of cerium ions in selected ternary compounds from the system Ce-Rh-Sn
- 2010ChemInform Abstract: BaGe5: A New Type of Intermetallic Clathrate.
- 2009Structure investigation of the (100) surface of the orthorhombic Al13Co4 crystalcitations
- 2008The first silicon-based cationic clathrate III with high thermal stability: Si172-xPxTey (x=2y, y>20).citations
- 2007Sn20.5□3.5As22I8: A Largely Disordered Cationic Clathrate with a New Type of Superstructure and Abnormally Low Thermal Conductivitycitations
- 2005Crystal structure, chemical bonding, and phase relations of the novel compound Co4Al7+xSi2-x (0.27 = x = 1.05)
Places of action
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article
Sn20.5□3.5As22I8: A Largely Disordered Cationic Clathrate with a New Type of Superstructure and Abnormally Low Thermal Conductivity
Abstract
Sn(20.5)As(22)I(8), a new cationic clathrate, has been prepared by using an ampoule technique. According to the X-ray powder diffraction data, it crystallizes in the face-centered cubic space group F23 or Fm(-)3 with a unit-cell parameter of a=22.1837(4) A. Single-crystal X-ray data allowed solution of the crystal structure in the subcell with a unit-cell parameter of a(0)=11.092(1) A and the space group Pm(-)3n (R=5.7 %). Sn(20.5)As(22)I(8) (or Sn(20.5) square(3.5)As(22)I(8), accounting for the vacancies in the framework) possesses the clathrate-I type crystal structure, with iodine atoms occupying the cages of the cationic framework composed of tin and arsenic atoms. The crystal structure is strongly disordered. The main features are a random distribution of vacancies, and shifts of the tin and arsenic atoms away from their ideal positions. The coordination of the tin atoms has been confirmed by using (119)Sn Mössbauer spectroscopy. Electron diffraction and high-resolution electron microscopy (HREM) analyses have confirmed the presence of the superstructure ordering, which results in a doubling of the unit-cell parameter and a change of the space group from Pm(-)3n to either F23 or Fm(-)3. Analysis of the crystal structure has led to the construction of four ordering models for the superstructure, which have been corroborated by HREM, and has also led to the identification of disordered regions originating from overlap of the different types of ordered domains. Sn(20.5)As(22)I(8) is a diamagnetic semiconductor with an estimated band gap of 0.45 eV; it displays abnormally low thermal conductivity, with the room temperature value being just 0.5 W m(-1) K(-1).