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K4Np5Se2O21

Alexandria ALEX

Alex-ID: agm008648166 · Space group: P-1 (#2)

Basic Information

Formula
K4Np5Se2O21
Alex-ID
agm008648166
Elements
4
Sites
32
Space group
P-1 (#2)
Crystal system
triclinic
Volume
570.83
ų
Cell a
7.1263
Å
Cell b
7.0993
Å
Cell c
11.7904
Å
α angle
97.43
°
β angle
100.60
°
γ angle
99.27
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
K4Np5Se2O21
K
4.00 · 12.5%
Np
5.00 · 15.6%
Se
2.00 · 6.3%
O
21.00 · 65.6%

Energy & Stability

Energy above hull
0.0000
eV/atom
Formation energy
-2.7821
eV/atom
Corrected total energy
-269.2425
eV
Raw total energy
-254.4944
eV

Electronic Structure

Indirect band gap
0.0145
eV
Direct band gap
0.0155
eV
DOS at Fermi level
22.2984
Total magnetisation
5.0006
μB

Additional Information

Prototype ID

A2B4C5D21_0_spg2

Decomposition

K4Np5Se2O21

Computed at

2025-02-09 03:20:32.597908

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: agm008648166).

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 agm008648166
data_agm008648166
_cell_length_a     7.12634
_cell_length_b     7.09930
_cell_length_c     11.79039
_cell_angle_alpha  97.42793
_cell_angle_beta   100.60395
_cell_angle_gamma  99.27283
_cell_volume       570.83222
_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 0.70614 0.42836 0.91474 1.00000
  K2 K 0.84648 0.70511 0.27645 1.00000
  K3 K 0.29386 0.57164 0.08526 1.00000
  K4 K 0.15352 0.29489 0.72355 1.00000
  Np1 Np 0.13228 0.23940 0.30924 1.00000
  Np2 Np 0.86772 0.76060 0.69076 1.00000
  Np3 Np 0.42562 0.86327 0.82501 1.00000
  Np4 Np 0.57438 0.13673 0.17499 1.00000
  Np5 Np 0.00000 0.00000 0.00000 1.00000
  Se1 Se 0.69108 0.33915 0.46367 1.00000
  Se2 Se 0.30892 0.66085 0.53633 1.00000
  O1 O 0.12005 0.89535 0.84373 1.00000
  O2 O 0.01405 0.23942 0.95248 1.00000
  O3 O 0.76772 0.58522 0.49070 1.00000
  O4 O 0.13256 0.01192 0.36414 1.00000
  O5 O 0.87995 0.10465 0.15627 1.00000
  O6 O 0.54252 0.90160 0.22628 1.00000
  O7 O 0.38869 0.62083 0.87043 1.00000
  O8 O 0.74721 0.86846 0.85065 1.00000
  O9 O 0.98595 0.76058 0.04752 1.00000
  O10 O 0.45748 0.09840 0.77372 1.00000
  O11 O 0.16953 0.73318 0.63458 1.00000
  O12 O 0.83047 0.26682 0.36542 1.00000
  O13 O 0.48530 0.31147 0.35295 1.00000
  O14 O 0.13544 0.47737 0.26472 1.00000
  O15 O 0.23228 0.41478 0.50930 1.00000
  O16 O 0.50000 0.00000 0.00000 1.00000
  O17 O 0.86744 0.98808 0.63586 1.00000
  O18 O 0.25279 0.13154 0.14935 1.00000
  O19 O 0.86456 0.52263 0.73528 1.00000
  O20 O 0.61131 0.37917 0.12957 1.00000
  O21 O 0.51470 0.68853 0.64705 1.00000
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