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Er2Tm4Se9

Alexandria ALEX

Alex-ID: agm005642345 · Space group: P-3c1 (#165)

Basic Information

Formula
Er2Tm4Se9
Alex-ID
agm005642345
Elements
3
Sites
30
Space group
P-3c1 (#165)
Crystal system
trigonal
Volume
844.65
ų
Cell a
7.1088
Å
Cell b
7.1103
Å
Cell c
19.2908
Å
α angle
90.01
°
β angle
90.03
°
γ angle
60.03
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
Er2Tm4Se9
Er
4.00 · 13.3%
Tm
8.00 · 26.7%
Se
18.00 · 60.0%

Energy & Stability

Energy above hull
0.0347
eV/atom
Formation energy
-1.8411
eV/atom
Corrected total energy
-172.0873
eV
Raw total energy
-172.0873
eV

Electronic Structure

Indirect band gap
2.0417
eV
Direct band gap
2.2380
eV
DOS at Fermi level
0.0000
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

A2B4C9_0_spg9

Decomposition

Er2Se3 Tm2Se3

Computed at

2023-06-16 23:54:56.031216

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: agm005642345).

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 agm005642345
data_agm005642345
_cell_length_a     7.10877
_cell_length_b     7.11027
_cell_length_c     19.29083
_cell_angle_alpha  90.00687
_cell_angle_beta   90.02564
_cell_angle_gamma  60.02619
_cell_volume       844.64935
_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
  Er1 Er 0.99897 0.00136 0.34723 1.00000
  Er2 Er 0.99976 0.99896 0.15254 1.00000
  Er3 Er 0.00103 0.99864 0.65277 1.00000
  Er4 Er 0.00024 0.00104 0.84746 1.00000
  Tm1 Tm 0.33297 0.33349 0.98627 1.00000
  Tm2 Tm 0.33389 0.33317 0.48676 1.00000
  Tm3 Tm 0.66703 0.66651 0.01373 1.00000
  Tm4 Tm 0.33233 0.33365 0.18050 1.00000
  Tm5 Tm 0.66611 0.66683 0.51324 1.00000
  Tm6 Tm 0.66578 0.66681 0.31981 1.00000
  Tm7 Tm 0.33422 0.33319 0.68019 1.00000
  Tm8 Tm 0.66767 0.66635 0.81950 1.00000
  Se1 Se 0.00111 0.30728 0.74988 1.00000
  Se2 Se 0.30768 0.69197 0.75030 1.00000
  Se3 Se 0.69285 0.00033 0.75009 1.00000
  Se4 Se 0.99889 0.69272 0.25012 1.00000
  Se5 Se 0.69232 0.30803 0.24970 1.00000
  Se6 Se 0.30715 0.99967 0.24991 1.00000
  Se7 Se 0.66438 0.97432 0.41659 1.00000
  Se8 Se 0.97349 0.36172 0.41689 1.00000
  Se9 Se 0.36012 0.66551 0.41659 1.00000
  Se10 Se 0.63763 0.02710 0.08329 1.00000
  Se11 Se 0.33493 0.63796 0.08329 1.00000
  Se12 Se 0.02695 0.33350 0.08312 1.00000
  Se13 Se 0.33562 0.02568 0.58341 1.00000
  Se14 Se 0.02651 0.63828 0.58311 1.00000
  Se15 Se 0.63988 0.33449 0.58341 1.00000
  Se16 Se 0.36237 0.97290 0.91671 1.00000
  Se17 Se 0.66507 0.36204 0.91671 1.00000
  Se18 Se 0.97305 0.66650 0.91688 1.00000
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