Order and disorder in the modulated phase hp-Mg9Ge5.1
(2022) In Zeitschrift fur Anorganische und Allgemeine Chemie 648(10).- Abstract
Single crystals of Mg9Ge5.1(2) were obtained at a pressure of 5 GPa in the temperature range 723 to 1273 K. The metastable high-pressure phase exhibits a crystal structure, which may be described as a host-guest variety of an UCl3-type framework. The atomic arrangement is characterized by a host crystal structure Mg9Ge3 with disordered germanium guests (≈2 Ge per formula unit) in the channels. The composite arrangement undergoes incommensurate modulation. Upon heating at ambient pressure, the phase transforms into the thermodynamically stable compounds Mg2Ge and Ge at 496(5) K. Measurements of the magnetic susceptibility indicate diamagnetic behavior between 75 and 350... (More)
Single crystals of Mg9Ge5.1(2) were obtained at a pressure of 5 GPa in the temperature range 723 to 1273 K. The metastable high-pressure phase exhibits a crystal structure, which may be described as a host-guest variety of an UCl3-type framework. The atomic arrangement is characterized by a host crystal structure Mg9Ge3 with disordered germanium guests (≈2 Ge per formula unit) in the channels. The composite arrangement undergoes incommensurate modulation. Upon heating at ambient pressure, the phase transforms into the thermodynamically stable compounds Mg2Ge and Ge at 496(5) K. Measurements of the magnetic susceptibility indicate diamagnetic behavior between 75 and 350 K.
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- author
- Akselrud, Lev ; Prots, Yurii ; Hübner, Julia Maria LU ; Burkhardt, Ulrich ; Schnelle, Walter ; Grin, Yuri and Schwarz, Ulrich
- organization
- publishing date
- 2022
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- germanium, high-pressure synthesis, Magnesium, modulated composite
- in
- Zeitschrift fur Anorganische und Allgemeine Chemie
- volume
- 648
- issue
- 10
- article number
- e202100381
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:85127670935
- ISSN
- 0044-2313
- DOI
- 10.1002/zaac.202100381
- language
- English
- LU publication?
- yes
- id
- ec311ec7-ced7-4b14-9393-21b4403cd8e4
- date added to LUP
- 2022-06-28 14:40:48
- date last changed
- 2023-11-19 20:38:48
@article{ec311ec7-ced7-4b14-9393-21b4403cd8e4, abstract = {{<p>Single crystals of Mg<sub>9</sub>Ge<sub>5.1(2)</sub> were obtained at a pressure of 5 GPa in the temperature range 723 to 1273 K. The metastable high-pressure phase exhibits a crystal structure, which may be described as a host-guest variety of an UCl<sub>3</sub>-type framework. The atomic arrangement is characterized by a host crystal structure Mg<sub>9</sub>Ge<sub>3</sub> with disordered germanium guests (≈2 Ge per formula unit) in the channels. The composite arrangement undergoes incommensurate modulation. Upon heating at ambient pressure, the phase transforms into the thermodynamically stable compounds Mg<sub>2</sub>Ge and Ge at 496(5) K. Measurements of the magnetic susceptibility indicate diamagnetic behavior between 75 and 350 K.</p>}}, author = {{Akselrud, Lev and Prots, Yurii and Hübner, Julia Maria and Burkhardt, Ulrich and Schnelle, Walter and Grin, Yuri and Schwarz, Ulrich}}, issn = {{0044-2313}}, keywords = {{germanium; high-pressure synthesis; Magnesium; modulated composite}}, language = {{eng}}, number = {{10}}, publisher = {{Wiley-Blackwell}}, series = {{Zeitschrift fur Anorganische und Allgemeine Chemie}}, title = {{Order and disorder in the modulated phase hp-Mg<sub>9</sub>Ge<sub>5.1</sub>}}, url = {{http://dx.doi.org/10.1002/zaac.202100381}}, doi = {{10.1002/zaac.202100381}}, volume = {{648}}, year = {{2022}}, }