Single crystal X-Ray structure of BeF2: α-quartz
Pallavi Ghalsasi1, Prasanna S Ghalsasi
1Department of Physics, Indian Institute of Technology Gandhinagar, Ahmedabad 382424, Gujarat, India.
Inorganic Chemistry
|December 15, 2010
Summary
Researchers synthesized and studied single crystals of Beryllium Fluoride (BeF2) for the first time. X-ray diffraction revealed its chiral trigonal structure, with Be atoms tetrahedrally bonded to four F atoms.
Area of Science:
- Inorganic Chemistry
- Solid-State Chemistry
- Crystallography
Background:
- Beryllium Fluoride (BeF2) is a compound with limited crystallographic data available.
- Previous studies focused on amorphous or polymeric forms of BeF2.
- Understanding the crystalline structure is crucial for its material properties.
Purpose of the Study:
- To synthesize single crystals of Beryllium Fluoride (BeF2).
- To determine the crystal structure of BeF2 using X-ray diffraction.
- To characterize the vibrational properties of crystalline BeF2.
Main Methods:
- Sublimation of amorphous BeF2 under reduced pressure to obtain single crystals.
- Single-crystal X-ray diffraction for structural determination.
- Infrared spectroscopy for vibrational analysis.
Main Results:
- First-time synthesis and structural analysis of BeF2 single crystals.
- Identification of the chiral trigonal space group P3(1)21.
- Determination of Be-F bond distances (1.5420(13) and 1.5471(13) Å) indicating a tetrahedral coordination.
- Observation of distinct infrared peaks at 770 and 410 cm(-1).
Conclusions:
- Crystalline BeF2 adopts a chiral trigonal structure.
- The BeF2 structure features tetrahedrally coordinated beryllium atoms.
- The synthesized crystals exhibit characteristic infrared absorption bands.
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