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Updated: Jul 4, 2025
09:12
Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures
Published on: August 10, 2017
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Cadmium phosphates Cd2(PO4)OH and Cd5(PO4)2(OH)4 crystallizing in mineral structures
1TU Wien, Institute for Chemical Technologies and Analytics, Division of Structural Chemistry, Getreidemarkt 9/E164-05-01, 1060 Vienna, Austria.
Acta Crystallographica. Section E, Crystallographic Communications
|February 9, 2024
Summary
Hydrothermal synthesis yielded two cadmium phosphates: Cd2(PO4)OH, adopting the triplite structure with disordered oxygen atoms, and Cd5(PO4)2(OH)4, featuring linked octahedral subunits. Both exhibit complex network structures.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Materials Science
Background:
- Cadmium phosphates are compounds with potential applications in various fields.
- Understanding their crystal structures is crucial for predicting their properties and exploring new materials.
- Hydrothermal synthesis is a common method for obtaining crystalline inorganic compounds.
Purpose of the Study:
- To synthesize and characterize single crystals of two basic cadmium phosphates: Cd2(PO4)OH and Cd5(PO4)2(OH)4.
- To determine their crystal structures and compare them with related compounds.
- To investigate the structural features, including polyhedral coordination and network formation.
Main Methods:
- Single crystal growth under hydrothermal conditions.
- X-ray diffraction for crystal structure determination.
- Analysis of coordination polyhedra and network topology.
Main Results:
- Cd2(PO4)OH was synthesized and found to adopt the triplite structure type, featuring a 3D network of edge- and vertex-sharing [CdO6] and [PO4] units. Positional disorder of oxygen atoms and hydrogen bonding interactions were observed.
- Cd5(PO4)2(OH)4 was synthesized and determined to adopt the arsenoclasite structure type, characterized by corrugated ribbons of edge- and vertex-sharing [CdO6] octahedra linked by [PO4] tetrahedra.
- Quantitative structural comparisons were made with isotypic compounds containing different metal (M) and phosphate/arsenate (X) elements.
Conclusions:
- The study successfully synthesized and elucidated the crystal structures of two novel cadmium phosphates.
- The determined structures reveal complex network architectures and highlight the role of polyhedral linkages and potential hydrogen bonding.
- The findings contribute to the understanding of structure-property relationships in cadmium-based inorganic materials.
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