A5058693565- Crystal Structures and Properties
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- High-pressure geophysics and materials
- Inorganic Chemistry and Materials
- Iron-based superconductors research
- Rare-earth and actinide compounds
- Luminescence Properties of Advanced Materials
- Advanced Condensed Matter Physics
- Inorganic Fluorides and Related Compounds
- Intermetallics and Advanced Alloy Properties
- Semiconductor materials and interfaces
- Nuclear materials and radiation effects
- Magnetic and transport properties of perovskites and related materials
- MXene and MAX Phase Materials
- Silicon and Solar Cell Technologies
- Boron and Carbon Nanomaterials Research
- Electronic and Structural Properties of Oxides
- Semiconductor materials and devices
- Chemical Synthesis and Characterization
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced ceramic materials synthesis
- Multiferroics and related materials
- 2D Materials and Applications
- Crystal structures of chemical compounds
Universität Innsbruck
2015-2024
Allgemeine Unfallversicherungsanstalt
2016-2021
Institute of Inorganic Chemistry of the Slovak Academy of Sciences
2019
Technische Universität Braunschweig
2018
University of Konstanz
2018
University of Münster
2018
Technical University of Munich
2018
Paderborn University
2018
University of Stuttgart
2012-2016
TU Wien
2016
High-pressure is utilized to realize new 2D layered structures in PdSe<sub>2</sub> with high-mobility transport anisotropy for photovoltaic applications.
The new narrow-band red-emitting phosphor material Sr4[LiAl11N14]:Eu2+ was synthesized by solid-state reaction using a tungsten crucible with cover plate in tube furnace. When excited blue light (460 nm), it exhibits red fluorescence an emission maximum at 670 nm and full width half-maximum of 1880 cm–1 (∼85 nm). crystal structure solved refined from single-crystal X-ray diffraction data. This compound the group nitridolithoaluminates crystallizes orthorhombic space Pnnm (No. 58) following...
A full range of ${\mathrm{SrRu}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x}{\mathrm{O}}_{3}$ perovskite solid solutions $(0<x<1)$ has been prepared using high temperatures and pressures up to $10.5\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. The structure changes from orthorhombic Pbnm at low $x$ through a previously unreported rhombohedral $R\overline{3}c$ phase $x=0.4$ cubic $Pm\overline{3}m$ for $0.5<x<1$. No $\mathrm{Cr}∕\mathrm{Ru}$ order is evidenced any $x$. substantial...
An orbital ordering transition and electronic phase coexistence have been discovered in SrCrO3. This cubic, orbitally-degenerate perovskite transforms to a tetragonal with partial order. The is antiferromagnetic below 35-40 K, whereas the cubic remains paramagnetic at low temperatures. temperature (35-70 K) of two phases are very sensitive lattice strain. X-ray measurements show preferential conversion most strained regions phase. reveals that small fluctuations microstrain sufficient drive...
The binary alkaline-earth aluminides AEAl2 (AE = Ca and Sr) AEAl4 Ca-Ba) have been synthesized from the elements investigated via powder X-ray diffraction experiments. CaAl2 adopts cubic MgCu2-type structure (Fd3̅m), while SrAl2 crystallizes in orthorhombic KHg2-type (Imma). LT-CaAl4 with monoclinic CaGa4-type (C2/m), HT-CaAl4, SrAl4, BaAl4 adopt tetragonal BaAl4-type (I4/mmm). close structural relation of two CaAl4 polymorphs was established using a group-subgroup Bärnighausen formalism. In...
Rare earth carbodiimides with the general formula RE 2(CN 2) 3 crystallize two modifications. A monoclinic( C2/m) modification is obtained for = Y, Ce-Tm and a rhombohedral ( R3 c) Tm-Lu. The space group c confirmed by single-crystal structure determination on Lu indexed powder patterns of Tm, Yb Lu. use diverse chemical syntheses conditions Tm revealed dimorphic character this compound. In addition, pressure experiments have induced phase-transition from to monoclinic. This transformation...
Transition metal dichalcogenides (TMDCs) have attracted extensive attention in recent years for their novel physical and chemical properties as well promising applications the future. In present paper, based on first-principles simulations, we focused bulk of TMDC material PdSe2 provided new insights into its unique structural electronic structures under uniaxial stress. For first time, revealed that this orthorhombic is an intrinsic ferroelastic with stress-driven 90° lattice rotation layer...
Abstract AlB 4 O 6 N, Al 0.97 Cr 0.03 B and 0.83 0.17 N are the first representatives of recently established structure‐family oxonitridoborates containing 3+ . These compounds isotypic to CrB synthesized in a multi‐anvil press under high‐pressure/high‐temperature conditions 7.0 GPa/1350 °C. Structural refinement by single‐crystal X‐ray diffraction shows that they crystallize space group P 3 mc (no. 186) with two formula units per cell. Detailed characterization including high‐temperature...
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Abstract We report on the synthesis, structure determination, and characterization of a new series compounds Ln CdB 6 O 10 (OH) 3 ( = Sm–Er). Syntheses were carried out in Walker-type multianvil device at 7 GPa 650 °C. Structure determinations revealed coexistence an orthorhombic monoclinic polymorph, depending ionic radius lanthanoid cation. The structural variants crystallize non-centrosymmetrically space group Pna 2 1 (no. 33), while modifications P / c 14). Both display layered crystal...
Verbeekite, a monoclinic polymorph of PdSe2, was reported for the first time in 2002 by Roberts et al. The mineral has been discovered Musonoi Cu-Co-Mn-U mine, Democratic Republic Congo, and named after Dr. Théodore Verbeek, geoscientist who studied palladium mineralization there (1955–1967). Until today, crystal structure this very rare unknown. By syntheses via multianvil high-pressure/high-temperature methods at 11.5 GPa 1300 °C, synthetic verbeekite could be obtained high degree purity...
The high-pressure (HP) modification of CePtSn was prepared under multianvil (9.2 GPa) high-temperature (1325 K) conditions from the normal-pressure (NP) modification. Both modifications were investigated by powder and single crystal X-ray data: TiNiSi type, Pnma, a = 746.89(9), b 462.88(4), c 801.93(7) pm, wR2 0.0487, 452 F 2 values, 20 variable parameters for NP-CePtSn, ZrNiAl P6̅2m, 756.919(5), 415.166(4) 0.0546, 252 14 HP-CePtSn. are built up platinumcentered trigonal prisms. Together,...
The cerium meta-oxoborate δ -Ce(BO 2 ) 3 was synthesized under high-pressure / high-temperature conditions of 3.5 GPa and 1050 ° C in a Walker-type multianvil apparatus. crystal structure determined by single X-ray diffraction data, collected at r. t. compound crystallizes monoclinicly the space group P2 1 /c with lattice parameters = 422.52(8), b 1169.7(2), c 725.2(2) pm, β 91.33(3)°. is isotypic to recently published phase -La(BO , consisting exclusively corner sharing [BO 4 ] 5− tetrahedra
Abstract The new high‐pressure borate HP‐Cs 1− x (H 3 O) B O 5 ( =0.5–0.7) was synthesized under high‐pressure/high‐temperature conditions of 6 GPa/900 °C in a Walker‐type multianvil apparatus. compound crystallizes the monoclinic space group C 2/ c Z =8) with parameters =1000.6(2) , b =887.8(2), =926.3(2) pm, β =103.1(1)°, V =0.8016(3) nm R 1=0.0452, and wR 2=0.0721 (all data). boron–oxygen network is analogous to those compounds HP‐MB (M=K, Rb) exhibits all three structural motifs...
Metastable palladium deficient high‐pressure phases with the compositions Pd 1– x S 2 and Se could be obtained via high‐pressure/high‐temperature syntheses at 7.5 GPa (Pd 0.88(1) ) 11.5 0.94(1) 1523 K. Compared to normal‐pressure modifications they showed a significant decrease in c ‐lattice parameters of Δ c/c = 4.4 % 10.8 accompanied by under‐occupied sites. Single‐crystal analyses indicated space group Pbca lattice refinement results 552.02(8), b 555.11(8), 720.20(11) pm, R 1 0.0562, wR...
As a consequence of the static Jahn-Teller effect
Abstract The high‐pressure (HP) modification of CePdSn was synthesized under multianvil (10.5 GPa) high‐temperature (1100 °C) conditions from the normal‐pressure (NP) modification. structures both modifications were studied by X‐ray powder and single crystal diffraction: TiNiSi type, Pnma , a = 754.1(2), b 470.6(1), c 798.4(3) pm, wR2 0.0333, 945 F 2 values, 20 variables for NP‐CePdSn ZrNiAl $P{\bar 6}{\rm 2}m$ 760.03(5), 416.06(3) 0.0443, 248 13 HP‐CePdSn. structural chemistry is goverened...
The compounds β -RE(BO 2 ) 3 [RE = Nd (neodymium meta-borate), Sm (samarium meta-borate) and Gd (gadolinium meta-borate)] were synthesized under high-pressure high-temperature conditions in a Walker-type multianvil apparatus at 3.5 GPa (Nd), 7.5 (Sm, Gd) 1050 °C. crystal structures determined by single X-ray diffraction data collected r. t. at−73°C respectively. are isotypic with the already known ambient-pressure phases (RE (Tb, Dy) Ho-Lu)
Independent and interpenetrating Li/O (Co,Te)/O substructures without a honeycomb-like ordering of CoO<sub>6</sub>and TeO<sub>6</sub>octahedra were observed in Li<sub>3</sub>Co<sub>1.06(1)</sub>TeO<sub>6</sub>.
Studies were conducted to investigate the properties of Ru–GaAs interface. An analysis was made two sets experimental findings, namely distribution surface states GaAs covered by submonolayers ruthenium, as well electrical measurements on contacts. It found for present case that a deep state near Et≊0.3 eV above valence band maximum is induced at surface. Thus influence intrinsic defects least compensated. Using simple model, it investigated which degree and their energy would govern barrier...