Navigation

HEAS Data Platform · Materials Science Database

K2Nb3F9

Alexandria ALEX

Alex-ID: agm005607801 · Space group: C2/m (#12)

Basic Information

Formula
K2Nb3F9
Alex-ID
agm005607801
Elements
3
Sites
28
Space group
C2/m (#12)
Crystal system
monoclinic
Volume
487.56
ų
Cell a
8.2793
Å
Cell b
8.5876
Å
Cell c
8.5876
Å
α angle
118.84
°
β angle
102.08
°
γ angle
102.08
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
K2Nb3F9
K
4.00 · 14.3%
Nb
6.00 · 21.4%
F
18.00 · 64.3%

Energy & Stability

Energy above hull
0.0000
eV/atom
Formation energy
-3.0526
eV/atom
Corrected total energy
-175.8696
eV
Raw total energy
-175.8696
eV

Electronic Structure

Indirect band gap
1.4420
eV
Direct band gap
1.4433
eV
DOS at Fermi level
-0.0013
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

A2B3C9_29_spg12

Decomposition

K2Nb3F9

Computed at

2023-06-14 02:28:51.957946

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: agm005607801).

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 agm005607801
data_agm005607801
_cell_length_a     8.27932
_cell_length_b     8.58762
_cell_length_c     8.58762
_cell_angle_alpha  118.83507
_cell_angle_beta   102.07635
_cell_angle_gamma  102.07634
_cell_volume       487.55774
_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 0.18468 0.55575 0.23165 1.00000
  K2 K 0.81532 0.76835 0.44425 1.00000
  K3 K 0.81532 0.44425 0.76835 1.00000
  K4 K 0.18468 0.23165 0.55575 1.00000
  Nb1 Nb 0.36486 0.14151 0.14151 1.00000
  Nb2 Nb 0.63514 0.85849 0.85849 1.00000
  Nb3 Nb 0.65826 0.04947 0.23729 1.00000
  Nb4 Nb 0.34174 0.76271 0.95053 1.00000
  Nb5 Nb 0.34174 0.95053 0.76271 1.00000
  Nb6 Nb 0.65826 0.23729 0.04947 1.00000
  F1 F 0.50000 0.20408 0.79592 1.00000
  F2 F 0.16507 0.50652 0.89226 1.00000
  F3 F 0.16507 0.89226 0.50652 1.00000
  F4 F 0.83493 0.49348 0.10774 1.00000
  F5 F 0.77232 0.70392 0.70392 1.00000
  F6 F 0.22768 0.29608 0.29608 1.00000
  F7 F 0.52577 0.41021 0.20456 1.00000
  F8 F 0.47423 0.79544 0.58979 1.00000
  F9 F 0.47423 0.58979 0.79544 1.00000
  F10 F 0.52577 0.20456 0.41021 1.00000
  F11 F 0.16161 0.68701 0.68701 1.00000
  F12 F 0.81107 0.89597 0.10360 1.00000
  F13 F 0.81107 0.10360 0.89597 1.00000
  F14 F 0.18893 0.10403 0.89640 1.00000
  F15 F 0.18893 0.89640 0.10403 1.00000
  F16 F 0.50000 0.79592 0.20408 1.00000
  F17 F 0.83839 0.31299 0.31299 1.00000
  F18 F 0.83493 0.10774 0.49348 1.00000
Get direct link