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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
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Ba4GaN3O.

Takayuki Hashimoto1, Hisanori Yamane1

  • 1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.

Acta Crystallographica. Section E, Structure Reports Online
|June 19, 2014
PubMed
Summary
This summary is machine-generated.

Researchers synthesized red, transparent tetra-barium gallium trinitride oxide (Ba4GaN3O) crystals using a sodium flux method. This new material features isolated triangular [GaN3](6-) anionic groups within its unique crystal structure.

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Area of Science:

  • Solid-state chemistry
  • Inorganic materials science
  • Crystal engineering

Background:

  • The synthesis of novel inorganic compounds with unique structural motifs is crucial for materials discovery.
  • Gallium nitride oxides (GaN-O) represent an interesting class of materials with potential applications.
  • Understanding the structural characteristics of barium-based compounds is key to developing new functional materials.

Purpose of the Study:

  • To synthesize and characterize a new barium gallium nitride oxide compound.
  • To elucidate the crystal structure of the synthesized Ba4GaN3O.
  • To investigate the coordination environment of the anionic [GaN3](6-) groups and the role of oxide anions.

Main Methods:

  • Single crystal growth utilizing the Na flux method.
  • X-ray diffraction for crystal structure determination.
  • Chemical analysis to confirm stoichiometry.

Main Results:

  • Red, transparent, platelet-shaped single crystals of tetra-barium gallium trinitride oxide (Ba4GaN3O) were successfully synthesized.
  • The crystal structure was determined to be isotypic with Sr4GaN3O.
  • The structure contains isolated triangular [GaN3](6-) anionic groups, with oxide ions (O(2-)) situated between [Ba4GaN3](2+) slabs.

Conclusions:

  • The synthesis of Ba4GaN3O expands the family of known gallium nitride oxides.
  • The determined crystal structure reveals a unique arrangement of anionic [GaN3](6-) groups stabilized by barium cations and oxide anions.
  • This structural insight provides a foundation for exploring potential properties and applications of this new material.