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Ge32 Co9-x : Creating "Empty" Space by High Pressure
William P Clark1, Wilder Carrillo-Cabrera1, Yurii Prots1
1Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187, Dresden, Germany.
A new metastable Germanium-Cobalt compound (Ge32Co9-x) was synthesized under high pressure. This novel material exhibits a unique crystal structure and metal-like electrical conductivity.
Area of Science:
- Solid-state chemistry
- Materials science
- Crystallography
Background:
- High-pressure synthesis enables the discovery of novel metastable materials.
- Understanding structure-property relationships is key in materials development.
Purpose of the Study:
- To synthesize and characterize a new Germanium-Cobalt compound.
- To elucidate its crystal structure and chemical bonding.
- To investigate its electrical properties.
Main Methods:
- High-pressure and high-temperature synthesis.
- X-ray diffraction for crystal structure determination.
- Real-space chemical bonding analysis.
- Electrical conductivity measurements.
Main Results:
- A new metastable compound, Ge32Co9-x, was successfully prepared.
- The material crystallizes in a novel structure type (Pearson symbol cI82-1.08).
- Analysis revealed Ge16Co3 cluster units and Ge-Ge bonds or lone-pairs in interstitial regions.
- The compound exhibits metal-like electrical conductivity.
Conclusions:
- Ge32Co9-x represents a new structure type with complex bonding.
- The compound's metastability and properties offer avenues for further research.
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