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KNb2As3(O5F2)2

Alexandria ALEX

Alex-ID: agm010841374 · Space group: P-1 (#2)

Basic Information

Formula
KNb2As3(O5F2)2
Alex-ID
agm010841374
Elements
5
Sites
40
Space group
P-1 (#2)
Crystal system
triclinic
Volume
671.90
ų
Cell a
8.1806
Å
Cell b
8.6923
Å
Cell c
9.5154
Å
α angle
90.47
°
β angle
83.81
°
γ angle
87.35
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
KNb2As3(O5F2)2
K
2.00 · 5.0%
Nb
4.00 · 10.0%
As
6.00 · 15.0%
O
20.00 · 50.0%
F
8.00 · 20.0%

Energy & Stability

Energy above hull
0.0314
eV/atom
Formation energy
-2.4551
eV/atom
Corrected total energy
-279.1144
eV
Raw total energy
-265.0686
eV

Electronic Structure

Indirect band gap
3.0319
eV
Direct band gap
3.0319
eV
DOS at Fermi level
0.0000
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

AB2C3D4E10_6_spg2

Decomposition

K2Nb2(OF2)3 NbAsO5 KAsOF4 As2O3 KNbF6

Computed at

2025-01-13 14:29:06

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: agm010841374).

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 agm010841374
data_agm010841374
_cell_length_a     8.18056
_cell_length_b     8.69228
_cell_length_c     9.51540
_cell_angle_alpha  90.47495
_cell_angle_beta   83.81450
_cell_angle_gamma  87.35396
_cell_volume       671.90220
_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 0.53347 0.44593 0.25427 1.00000
  K2 K 0.46653 0.55407 0.74573 1.00000
  Nb1 Nb 0.17180 0.75292 0.44207 1.00000
  Nb2 Nb 0.81652 0.76764 0.04218 1.00000
  Nb3 Nb 0.82820 0.24708 0.55793 1.00000
  Nb4 Nb 0.18348 0.23236 0.95782 1.00000
  As1 As 0.22629 0.10276 0.59776 1.00000
  As2 As 0.74835 0.16056 0.93779 1.00000
  As3 As 0.77371 0.89724 0.40224 1.00000
  As4 As 0.25165 0.83944 0.06221 1.00000
  As5 As 0.00047 0.46476 0.24265 1.00000
  As6 As 0.99953 0.53524 0.75735 1.00000
  O1 O 0.12714 0.59776 0.62113 1.00000
  O2 O 0.88463 0.68341 0.84908 1.00000
  O3 O 0.87286 0.40224 0.37887 1.00000
  O4 O 0.11537 0.31659 0.15092 1.00000
  O5 O 0.91915 0.78097 0.46923 1.00000
  O6 O 0.02780 0.83845 0.06965 1.00000
  O7 O 0.08085 0.21903 0.53077 1.00000
  O8 O 0.97220 0.16155 0.93035 1.00000
  O9 O 0.20642 0.89678 0.31236 1.00000
  O10 O 0.71531 0.82850 0.24987 1.00000
  O11 O 0.79358 0.10322 0.68764 1.00000
  O12 O 0.28469 0.17150 0.75013 1.00000
  O13 O 0.19276 0.91125 0.60402 1.00000
  O14 O 0.73157 0.95814 0.97453 1.00000
  O15 O 0.80724 0.08875 0.39598 1.00000
  O16 O 0.26843 0.04186 0.02547 1.00000
  O17 O 0.14903 0.57996 0.29644 1.00000
  O18 O 0.88039 0.55628 0.12952 1.00000
  O19 O 0.85097 0.42004 0.70356 1.00000
  O20 O 0.11961 0.44372 0.87048 1.00000
  F1 F 0.39310 0.12723 0.47246 1.00000
  F2 F 0.71859 0.21747 0.12580 1.00000
  F3 F 0.60690 0.87277 0.52754 1.00000
  F4 F 0.28141 0.78253 0.87420 1.00000
  F5 F 0.39580 0.65993 0.44531 1.00000
  F6 F 0.60180 0.66602 0.03633 1.00000
  F7 F 0.60420 0.34007 0.55469 1.00000
  F8 F 0.39820 0.33398 0.96367 1.00000
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