Dr. Dennis Wiedemann
Dr. Dennis Wiedemann
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At the Gates: The Tantalum-Rich Phase Hf₃Ta₂O₁₁ and its Commensurately Modulated Structure
We summarize the sparse reported findings and present the new phase Hf₃Ta₂O₁₁ as synthesized via a sol–gel route.
Dr. Dennis Wiedemann
,
T. Lüdtke
,
L. Palatinus
,
E. Willinger
,
M. G. Willinger
,
M. J. Mühlbauer
,
M. Lerch
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DOI
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Structural Dynamics of Spin Crossover in Iron(II) Complexes with Extended-Tripod Ligands
We show that modulation of the reaction coordinate through careful selection of the ligand can indeed massively slow down dynamic exchange.
P. Stock
,
Dr. Dennis Wiedemann
,
H. Petzold
,
G. Hörner
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DOI
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Invariom-model refinement and Hirshfeld surface analysis of well-ordered solvent-free dibenzo-21-crown-7
We present the X-ray crystal structure analysis of well-ordered solvent-free crystals of dibenzo-21-crown-7.
Dr. Dennis Wiedemann
,
J. Kohl
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DOI
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CIF
Diffusion Pathways and Activation Energies in Crystalline Lithium-Ion Conductors
We give an introduction to the experimental and computational methods used in our subproject within the research unit FOR 1277.
Dr. Dennis Wiedemann
,
M. M. Islam
,
T. Bredow
,
M. Lerch
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DOI
HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide
The crystal structure of high-pressure molybdenum dioxide (HP-MoO₂) was determined and computed.
T. Lüdtke
,
Dr. Dennis Wiedemann
,
I. Efthimiopoulos
,
N. Becker
,
S. Seidel
,
O. Janka
,
R. Pöttgen
,
R. Dronskowski
,
M. Koch-Müller
,
M. Lerch
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Lithium diffusion pathways in metastable ramsdellite-like Li₂Ti₃O₇ from high-temperature neutron diffraction
We use variable-temperature neutron diffraction in the metastability range of ramsdellite-like Li₂Ti₃O₇ to probe the nontrivial lithium-ion distribution.
Dr. Dennis Wiedemann
,
S. Nakhal
,
A. Franz
,
M. Lerch
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Lithium Diffusion Pathways in 3R-LiₓTiS₂: A Combined Neutron Diffraction and Computational Study
We report on the diffusion dynamics in lithium-deficient high-temperature polymorphs of lithium titanium sulfides (3R-LiₓTiS₂; x = 0.7, 0.9).
Dr. Dennis Wiedemann
,
M. M. Islam
,
S. Nakhal
,
A. Senyshyn
,
T. Bredow
,
M. Lerch
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DOI
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LiBi₃S₅—A lithium bismuth sulfide with strong cation disorder
We present a solid-state route to phase-pure LiBi₃S₅ powder, its neutron diffractograms and lithium NMR spectra.
S. Nakhal
,
Dr. Dennis Wiedemann
,
B. Stanje
,
O. Dolotko
,
M. Wilkening
,
M. Lerch
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DOI
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Single-crystal neutron diffraction on γ-LiAlO₂: structure determination and estimation of lithium diffusion pathway
We report on the outcome of single-crystal neutron diffraction studies on γ-LiAlO₂ at ambient and high temperature.
Dr. Dennis Wiedemann
,
S. Indris
,
M. Meven
,
B. Pedersen
,
H. Boysen
,
R. Uecker
,
P. Heitjans
,
M. Lerch
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DOI
Unravelling Ultraslow Lithium-Ion Diffusion in γ-LiAlO₂: Experiments with Tracers, Neutrons, and Charge Carriers
We summarize the studies on diffusion in LiAlO₂ and present neutron diffraction, tracer-diffusion experiments, NMR spectroscopy, and computation.
Dr. Dennis Wiedemann
,
S. Nakhal
,
J. Rahn
,
E. Witt
,
M. M. Islam
,
S. Zander
,
P. Heitjans
,
H. Schmidt
,
T. Bredow
,
M. Wilkening
,
M. Lerch
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DOI
Supporting Information
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