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Updated: Jul 13, 2026
06:53
Fabrication and Optimization of Type II Silicon Clathrate Films
Published on: October 14, 2025
Ca3GeO4Cl2 with a norbergite-like structure.
Günther J Redhammer1, Georg Roth, Georg Amthauer
1Department of Materials Science, Division of Mineralogy, University of Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria.
Summary
Tricalcium monogermanate dichloride exhibits an orthorhombic structure. Its framework comprises interconnected calcium polyhedra and germanium tetrahedra, with similarities to humite-type minerals.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Materials Science
Background:
- Understanding the crystal structure of germanate compounds is crucial for materials science.
- Tricalcium monogermanate dichloride is a novel compound with potential applications.
- Previous research has explored humite-type minerals, providing a basis for comparison.
Purpose of the Study:
- To determine the crystal structure of tricalcium monogermanate dichloride.
- To analyze the coordination and bonding within the structure.
- To compare the structure with related humite-type materials.
Main Methods:
- Single-crystal X-ray diffraction was used to elucidate the crystal structure.
- Analysis of atomic positions, site symmetry, and coordination polyhedra.
- Comparative structural analysis with known humite-type compounds.
Main Results:
- Tricalcium monogermanate dichloride crystallizes in an orthorhombic system.
- The structure features a 3D framework of edge- and corner-sharing Ca polyhedra (Ca1O(4)Cl(2) octahedra).
- Interstitial spaces are filled by Ca2O(4)Cl(2) triangular prisms and GeO(4) tetrahedra.
Conclusions:
- The detailed crystal structure of tricalcium monogermanate dichloride has been established.
- The structural framework and coordination of atoms provide insights into its properties.
- Structural similarities and differences with humite-type materials were discussed.
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