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KCu9Ge4

Alexandria ALEX

Alex-ID: agm006042998 · Space group: I4/mcm (#140)

Basic Information

Formula
KCu9Ge4
Alex-ID
agm006042998
Elements
3
Sites
28
Space group
I4/mcm (#140)
Crystal system
tetragonal
Volume
419.27
ų
Cell a
8.3292
Å
Cell b
8.3292
Å
Cell c
8.4387
Å
α angle
119.57
°
β angle
119.57
°
γ angle
90.00
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
KCu9Ge4
K
2.00 · 7.1%
Cu
18.00 · 64.3%
Ge
8.00 · 28.6%

Energy & Stability

Energy above hull
0.0394
eV/atom
Formation energy
-0.0025
eV/atom
Corrected total energy
-114.0932
eV
Raw total energy
-114.0931
eV

Electronic Structure

Indirect band gap
0.0000
eV
Direct band gap
0.0560
eV
DOS at Fermi level
5.6319
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

AB4C9_5_spg140

Decomposition

K3Ge17 K3CuGe4 Cu

Computed at

2023-08-07 10:44:29.018084

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: agm006042998).

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 agm006042998
data_agm006042998
_cell_length_a     8.32922
_cell_length_b     8.32922
_cell_length_c     8.43869
_cell_angle_alpha  119.57181
_cell_angle_beta   119.57180
_cell_angle_gamma  90.00000
_cell_volume       419.27129
_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
  K1 K 0.75000 0.75000 0.50000 1.00000
  K2 K 0.25000 0.25000 0.50000 1.00000
  Cu1 Cu 0.06247 0.20500 1.00000 1.00000
  Cu2 Cu 0.93753 0.79500 0.00000 1.00000
  Cu3 Cu 0.56247 0.29500 1.00000 1.00000
  Cu4 Cu 0.43753 0.70500 0.00000 1.00000
  Cu5 Cu 0.29500 0.43753 0.00000 1.00000
  Cu6 Cu 0.70500 0.56247 1.00000 1.00000
  Cu7 Cu 0.20500 0.93753 1.00000 1.00000
  Cu8 Cu 0.79500 0.06247 0.00000 1.00000
  Cu9 Cu 0.00000 0.50000 0.00000 1.00000
  Cu10 Cu 0.50000 0.00000 0.00000 1.00000
  Cu11 Cu 0.79602 0.29602 0.35818 1.00000
  Cu12 Cu 0.56216 0.06216 0.35818 1.00000
  Cu13 Cu 0.93784 0.20398 0.64182 1.00000
  Cu14 Cu 0.70398 0.43784 0.64182 1.00000
  Cu15 Cu 0.20398 0.70398 0.64182 1.00000
  Cu16 Cu 0.43784 0.93784 0.64182 1.00000
  Cu17 Cu 0.29602 0.56216 0.35818 1.00000
  Cu18 Cu 0.06216 0.79602 0.35818 1.00000
  Ge1 Ge 0.30068 0.80068 0.24221 1.00000
  Ge2 Ge 0.94153 0.44153 0.24221 1.00000
  Ge3 Ge 0.55847 0.69932 0.75779 1.00000
  Ge4 Ge 0.19932 0.05847 0.75779 1.00000
  Ge5 Ge 0.69932 0.19932 0.75779 1.00000
  Ge6 Ge 0.05847 0.55847 0.75779 1.00000
  Ge7 Ge 0.80068 0.94153 0.24221 1.00000
  Ge8 Ge 0.44153 0.30068 0.24221 1.00000
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