DGK conference 2022

Session

Solid State and Materials Chemistry I

MS9

Mar 15, 2022, 2:20 PM

Conveners

Solid State and Materials Chemistry I

• Oliver Oeckler (Leipzig University)

74. Determination of the crystal structure of magnesium stearate hydrate using micrometre size single crystals

Toms Rekis (University of Copenhagen)

3/15/22, 3:20 PM

Structural Chemistry & New crystal structures

Talk

Crystalline magnesium stearate has been extensively used in pharmaceutical and other industries for decades. However, its crystal structure was not known. We present here the structure of the magnesium stearate trihydrate as determined from X-ray diffraction data of a micron-size single-crystal measured at a 4th generation synchrotron facility. Despite the small size of the single-crystals and...

108. Influence of water on the high-pressure behavior of silica glass

Markus Herrmann (University of Cologne, Institute of Geology and Mineralogy)

3/15/22, 3:00 PM

Talk

In this study, we have investigated the influence of high-pressure on the structure of hydrous SiO2 glass by a combination of high-pressure Raman spectroscopy and X-ray Raman scattering (XRS) measurements. Previous data of anhydrous SiO2 glass serve as a reference. A detailed analysis of the SiO2 network of both compounds is provided. Moreover, we discuss the role of water in the glass...

147. Mullite-type materials: Introducing a new structure-type for the design of high-entropy oxides

Dr Andrea Kirsch (University of Copenhagen, Department of Chemistry, Nanostructure group, Copenhagen, Denmark)

3/15/22, 2:20 PM

Structural Chemistry & New crystal structures

Talk

High-entropy oxides (HEO) are a new class of materials containing five or more metal cations in a single-phase solid solution. For the first time, we show that high-entropy versions of mullite-type materials can be synthesized exemplarily shown in the form of 5 new compounds e.g. Bi2(AlGaFeMn)O9 and (Nd,Sm,Y,Er,Eu)2Mn4O10. The crystallized products as well as their formation are characterized...

21. SFCA-I-type solid solutions in the system CaO-Fe2O3-FeO-Al2O3 – structural investigations on an iron-ore sintering phase

Volker Kahlenberg (DGK)

3/15/22, 2:40 PM

Engineering Materials and Applications

Talk

Effects of Fe ↔ Al substitution on SFCA-I-type compounds with general formula A40O56 (A: Ca, Al, Fe3+, Fe2+) have been studied using single-crystal X-ray diffraction. The present investigation provides a detailed crystallographic analysis on the impact of chemical variations on a compound that is of relevance for the field of applied mineralogy related to the technologically important process...

75. Structure of UO2 at low temperatures

Nikolas Kraft

3/15/22, 3:40 PM

Structural Chemistry & New crystal structures

Talk

We studied the structure of UO2 and its temperature dependence from 300 K to 20 K using synchrotron single crystal diffraction. Our samples were UO2 single crystals with a close stoichiometry, confirmed by Raman spectroscopy measurements. Anomalies in lattice parameters will be discussed as well as electron density measurements both above and below the magnetic phase transition, which is...