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Dilead mercury chromate(VI), Pb2HgCrO6
1Max-Planck Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
Acta Crystallographica. Section C, Crystal Structure Communications
|February 6, 2002
Summary
The crystal structure of Pb(2)HgCrO(6) reveals isolated chromate tetrahedra and mercury-oxygen dumbbells forming layers, intercalated with lead layers. The stereochemically active Pb(2+) cation exhibits unique coordination.
Area of Science:
- Inorganic Chemistry
- Solid-State Chemistry
- Crystallography
Background:
- Understanding the structural characteristics of complex inorganic compounds is crucial for materials science.
- Lead, mercury, and chromium compounds exhibit diverse structural motifs and properties.
Purpose of the Study:
- To elucidate the detailed crystal structure of Pb(2)HgCrO(6).
- To describe the coordination environment of the Pb(2+) cation and its stereochemical activity.
Main Methods:
- Single-crystal X-ray diffraction analysis was employed.
- The crystal structure was solved and refined using crystallographic software.
Main Results:
- Pb(2)HgCrO(6) crystallizes in the space group P-1.
- The structure features isolated [CrO(4)](2-) tetrahedra and linear [HgO(2)](2-) units, forming [HgCrO(6)](4-) layers.
- These layers are intercalated by corrugated pseudo-hexagonal Pb(2+) layers.
- The Pb(2+) cation is stereochemically active with a coordination number of 3+5.
Conclusions:
- The described structural arrangement provides insight into the bonding and packing in this lead-mercury-chromate system.
- The stereochemical activity of Pb(2+) significantly influences the overall crystal structure and potentially its properties.