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Pm2Sm4Se9

Alexandria ALEX

Alex-ID: agm005642272 · Space group: P-3c1 (#165)

Basic Information

Formula
Pm2Sm4Se9
Alex-ID
agm005642272
Elements
3
Sites
30
Space group
P-3c1 (#165)
Crystal system
trigonal
Volume
937.51
ų
Cell a
7.3972
Å
Cell b
7.3984
Å
Cell c
19.7789
Å
α angle
90.00
°
β angle
90.01
°
γ angle
60.01
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
Pm2Sm4Se9
Pm
4.00 · 13.3%
Sm
8.00 · 26.7%
Se
18.00 · 60.0%

Energy & Stability

Energy above hull
0.0527
eV/atom
Formation energy
-1.8399
eV/atom
Corrected total energy
-174.8190
eV
Raw total energy
-174.8190
eV

Electronic Structure

Indirect band gap
1.9938
eV
Direct band gap
2.2111
eV
DOS at Fermi level
0.0000
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

A2B4C9_0_spg9

Decomposition

Pm2Se3 Sm2Se3

Computed at

2023-06-15 12:24:30.358805

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: agm005642272).

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 agm005642272
data_agm005642272
_cell_length_a     7.39715
_cell_length_b     7.39837
_cell_length_c     19.77887
_cell_angle_alpha  89.99804
_cell_angle_beta   90.00913
_cell_angle_gamma  60.00997
_cell_volume       937.51119
_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
  Pm1 Pm 0.99962 0.00015 0.35034 1.00000
  Pm2 Pm 0.99974 0.99981 0.14951 1.00000
  Pm3 Pm 0.00038 0.99985 0.64966 1.00000
  Pm4 Pm 0.00026 0.00019 0.85049 1.00000
  Sm1 Sm 0.33338 0.33336 0.98368 1.00000
  Sm2 Sm 0.33329 0.33331 0.48377 1.00000
  Sm3 Sm 0.66662 0.66664 0.01632 1.00000
  Sm4 Sm 0.33286 0.33338 0.18337 1.00000
  Sm5 Sm 0.66671 0.66669 0.51623 1.00000
  Sm6 Sm 0.66625 0.66664 0.31657 1.00000
  Sm7 Sm 0.33375 0.33336 0.68343 1.00000
  Sm8 Sm 0.66714 0.66662 0.81663 1.00000
  Se1 Se 0.00039 0.30216 0.75004 1.00000
  Se2 Se 0.30234 0.69775 0.75015 1.00000
  Se3 Se 0.69813 0.00007 0.75007 1.00000
  Se4 Se 0.99961 0.69784 0.24996 1.00000
  Se5 Se 0.69766 0.30225 0.24985 1.00000
  Se6 Se 0.30187 0.99993 0.24993 1.00000
  Se7 Se 0.66397 0.96869 0.41649 1.00000
  Se8 Se 0.96842 0.36717 0.41652 1.00000
  Se9 Se 0.36671 0.66454 0.41659 1.00000
  Se10 Se 0.63248 0.03146 0.08347 1.00000
  Se11 Se 0.33552 0.63281 0.08342 1.00000
  Se12 Se 0.03148 0.33513 0.08327 1.00000
  Se13 Se 0.33603 0.03131 0.58351 1.00000
  Se14 Se 0.03158 0.63283 0.58348 1.00000
  Se15 Se 0.63329 0.33546 0.58341 1.00000
  Se16 Se 0.36752 0.96854 0.91653 1.00000
  Se17 Se 0.66448 0.36719 0.91658 1.00000
  Se18 Se 0.96852 0.66487 0.91673 1.00000
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