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KGa2As

Alexandria ALEX

Alex-ID: agm002842829 · Space group: I-42d (#122)

Alexandria Database API

Basic Information

Formula
KGa2As
Alex-ID
agm002842829
Elements
3
Sites
8
Space group
I-42d (#122)
Crystal system
tetragonal
Volume
216.21
ų
Cell a
8.2837
Å
Cell b
8.2837
Å
Cell c
6.6511
Å
α angle
51.48
°
β angle
51.48
°
γ angle
90.00
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
KGa2As
As
2.00 · 25.0%
K
2.00 · 25.0%
Ga
4.00 · 50.0%

Energy & Stability

Energy above hull
0.2688
eV/atom
Formation energy
-0.0820
eV/atom
Corrected total energy
-24.2766
eV
Raw total energy
-24.2766
eV

Electronic Structure

Indirect band gap
0.0000
eV
Direct band gap
0.1642
eV
DOS at Fermi level
0.0180
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

ABC2_185_spg122

Decomposition

K3Ga13 K3Ga3As4 GaAs

Computed at

2017-01-22 12:31:31

Citation

Alexandria website
https://alexandria.icams.rub.de/
Attribution

The crystal structure and related material properties of this entry were obtained from the Alexandria database (Alex-ID: agm002842829).

Reference

Th. Cavignac, J. Schmidt, P.-P. De Breuck, A. Loew, T. F. T. Cerqueira, H.-C. Wang, A. Bochkarev, Y. Lysogorskiy, A. H. Romero, R. Drautz, S. Botti and M. A. L. Marques. AI-Driven expansion and application of the Alexandria database. J. Phys. Mater. 9, 025014 (2026). https://doi.org/10.1088/2515-7639/ae6620

BibTeX 
@article{Cavignac2026Alexandria,
  author  = {Cavignac, Th{\'e}o and Schmidt, Jonathan and De Breuck, Pierre-Paul and Loew, Antoine
             and Cerqueira, Tiago F. T. and Wang, Hai-Chen and Bochkarev, Anton
             and Lysogorskiy, Yury and Romero, Aldo H. and Drautz, Ralf and Botti, Silvana
             and Marques, Miguel A. L.},
  title   = {{AI}-Driven expansion and application of the {A}lexandria database},
  journal = {Journal of Physics: Materials},
  year    = {2026},
  volume  = {9},
  number  = {2},
  pages   = {025014},
  doi     = {10.1088/2515-7639/ae6620},
  url     = {https://doi.org/10.1088/2515-7639/ae6620}
}

3D Crystal Structure Rendering

Loading 3D structure…

Style: Ball & Stick
Raw CIF Data 
# CIF generated by HEAS from Alexandria entry agm002842829
data_agm002842829
_cell_length_a     8.28371
_cell_length_b     8.28371
_cell_length_c     6.65112
_cell_angle_alpha  51.48422
_cell_angle_beta   51.48422
_cell_angle_gamma  90.00000
_cell_volume       216.20680
_symmetry_space_group_name_H-M 'P 1'
_symmetry_Int_Tables_number 1
loop_
_symmetry_equiv_pos_as_xyz
  'x, y, z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
  As1 As 0.00000 0.00000 0.00000 1.00000
  As2 As 0.75000 0.25000 0.50000 1.00000
  K1 K 0.50000 0.50000 0.00000 1.00000
  K2 K 0.25000 0.75000 0.50000 1.00000
  Ga1 Ga 0.69706 0.12500 0.25000 1.00000
  Ga2 Ga 0.05294 0.62500 0.25000 1.00000
  Ga3 Ga 0.37500 0.30294 0.75000 1.00000
  Ga4 Ga 0.87500 0.94706 0.75000 1.00000
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