K7NbAs4
Alexandria ALEXAlex-ID: agm020048154 · Space group: Pnma (#62)
Basic Information
Formula
K7NbAs4
Alex-ID
agm020048154
Elements
3
Sites
48
Space group
Pnma (#62)
Crystal system
orthorhombic
Volume
1,633.95
ų
Cell a
8.4492
Å
Cell b
10.3002
Å
Cell c
18.7748
Å
α angle
90.00
°
β angle
90.00
°
γ angle
90.00
°
Composition
Element Composition (atomic fraction)
Composition Info
Formula
K7NbAs4
K
28.00 · 58.3%
Nb
4.00 · 8.3%
As
16.00 · 33.3%
Energy & Stability
Energy above hull
0.0027
eV/atom
Formation energy
-0.4704
eV/atom
Corrected total energy
-168.1121
eV
Raw total energy
-168.1121
eV
Electronic Structure
Indirect band gap
0.8996
eV
Direct band gap
0.8996
eV
DOS at Fermi level
-0.3050
Total magnetisation
0.0000
μB
Additional Information
Prototype ID
AB4C7_1017_spg62
Decomposition
K7NbAs4
Computed at
2025-01-19 17:53:59
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: agm020048154).
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
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Raw CIF Data
# CIF generated by HEAS from Alexandria entry agm020048154
data_agm020048154
_cell_length_a 8.44918
_cell_length_b 10.30025
_cell_length_c 18.77480
_cell_angle_alpha 90.00000
_cell_angle_beta 90.00000
_cell_angle_gamma 90.00000
_cell_volume 1633.94578
_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 0.93761 0.25000 0.00785 1.00000
K2 K 0.06239 0.75000 0.99215 1.00000
K3 K 0.43761 0.75000 0.49215 1.00000
K4 K 0.56239 0.25000 0.50785 1.00000
K5 K 0.21023 0.03314 0.08617 1.00000
K6 K 0.78977 0.96686 0.91383 1.00000
K7 K 0.71023 0.96686 0.41383 1.00000
K8 K 0.78977 0.53314 0.91383 1.00000
K9 K 0.28977 0.03314 0.58617 1.00000
K10 K 0.21023 0.46686 0.08617 1.00000
K11 K 0.28977 0.46686 0.58617 1.00000
K12 K 0.71023 0.53314 0.41383 1.00000
K13 K 0.01856 0.04660 0.26251 1.00000
K14 K 0.98144 0.95340 0.73749 1.00000
K15 K 0.51856 0.95340 0.23749 1.00000
K16 K 0.98144 0.54660 0.73749 1.00000
K17 K 0.48144 0.04660 0.76251 1.00000
K18 K 0.01856 0.45340 0.26251 1.00000
K19 K 0.48144 0.45340 0.76251 1.00000
K20 K 0.51856 0.54660 0.23749 1.00000
K21 K 0.68576 0.25000 0.16226 1.00000
K22 K 0.31424 0.75000 0.83774 1.00000
K23 K 0.18576 0.75000 0.33774 1.00000
K24 K 0.81424 0.25000 0.66226 1.00000
K25 K 0.03133 0.25000 0.44339 1.00000
K26 K 0.96867 0.75000 0.55661 1.00000
K27 K 0.53133 0.75000 0.05661 1.00000
K28 K 0.46867 0.25000 0.94339 1.00000
Nb1 Nb 0.40581 0.25000 0.33703 1.00000
Nb2 Nb 0.59419 0.75000 0.66297 1.00000
Nb3 Nb 0.90581 0.75000 0.16297 1.00000
Nb4 Nb 0.09419 0.25000 0.83703 1.00000
As1 As 0.70573 0.25000 0.33679 1.00000
As2 As 0.29427 0.75000 0.66321 1.00000
As3 As 0.20573 0.75000 0.16321 1.00000
As4 As 0.79427 0.25000 0.83679 1.00000
As5 As 0.31215 0.25000 0.20993 1.00000
As6 As 0.68785 0.75000 0.79007 1.00000
As7 As 0.81215 0.75000 0.29007 1.00000
As8 As 0.18785 0.25000 0.70993 1.00000
As9 As 0.31576 0.04449 0.40191 1.00000
As10 As 0.68424 0.95551 0.59809 1.00000
As11 As 0.81576 0.95551 0.09809 1.00000
As12 As 0.68424 0.54449 0.59809 1.00000
As13 As 0.18424 0.04449 0.90191 1.00000
As14 As 0.31576 0.45551 0.40191 1.00000
As15 As 0.18424 0.45551 0.90191 1.00000
As16 As 0.81576 0.54449 0.09809 1.00000
