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Ac2Sm4Ge3O2

Alexandria ALEX

Alex-ID: agm004489042 · Space group: I4/mmm (#139)

Alexandria Database API

Basic Information

Formula
Ac2Sm4Ge3O2
Alex-ID
agm004489042
Elements
4
Sites
11
Space group
I4/mmm (#139)
Crystal system
tetragonal
Volume
283.34
ų
Cell a
4.7359
Å
Cell b
4.7359
Å
Cell c
13.0693
Å
α angle
100.44
°
β angle
100.44
°
γ angle
90.00
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
Ac2Sm4Ge3O2
Ac
2.00 · 18.2%
Sm
4.00 · 36.4%
Ge
3.00 · 27.3%
O
2.00 · 18.2%

Energy & Stability

Energy above hull
0.0212
eV/atom
Formation energy
-1.6539
eV/atom
Corrected total energy
-69.0723
eV
Raw total energy
-67.6677
eV

Electronic Structure

Indirect band gap
0.0000
eV
Direct band gap
0.0026
eV
DOS at Fermi level
7.5485
Total magnetisation
0.3856
μB

Additional Information

Prototype ID

A2B2C3D4_39_spg139

Decomposition

Ac4Ge3 Sm4Ge3 Sm2O3 Ac

Computed at

2022-06-18 05:16:31.136262

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: agm004489042).

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 agm004489042
data_agm004489042
_cell_length_a     4.73587
_cell_length_b     4.73587
_cell_length_c     13.06927
_cell_angle_alpha  100.43869
_cell_angle_beta   100.43869
_cell_angle_gamma  90.00000
_cell_volume       283.33747
_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
  Ac1 Ac 0.30389 0.30389 0.60779 1.00000
  Ac2 Ac 0.69611 0.69611 0.39221 1.00000
  Sm1 Sm 0.42285 0.92285 0.84569 1.00000
  Sm2 Sm 0.92285 0.42285 0.84569 1.00000
  Sm3 Sm 0.07715 0.57715 0.15431 1.00000
  Sm4 Sm 0.57715 0.07715 0.15431 1.00000
  Ge1 Ge 0.00000 0.00000 0.00000 1.00000
  Ge2 Ge 0.16838 0.16838 0.33676 1.00000
  Ge3 Ge 0.83162 0.83162 0.66324 1.00000
  O1 O 0.40687 0.40687 0.81374 1.00000
  O2 O 0.59313 0.59313 0.18626 1.00000
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