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SmNp(GeO4)2

Alexandria ALEX

Alex-ID: agm004886428 · Space group: I-4m2 (#119)

Basic Information

Formula
SmNp(GeO4)2
Alex-ID
agm004886428
Elements
4
Sites
12
Space group
I-4m2 (#119)
Crystal system
tetragonal
Volume
164.06
ų
Cell a
5.9848
Å
Cell b
5.9848
Å
Cell c
5.9848
Å
α angle
107.03
°
β angle
107.03
°
γ angle
114.47
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
SmNp(GeO4)2
Sm
1.00 · 8.3%
Np
1.00 · 8.3%
Ge
2.00 · 16.7%
O
8.00 · 66.7%

Energy & Stability

Energy above hull
0.0605
eV/atom
Formation energy
-2.8436
eV/atom
Corrected total energy
-100.6884
eV
Raw total energy
-95.0701
eV

Electronic Structure

Indirect band gap
0.0014
eV
Direct band gap
0.0014
eV
DOS at Fermi level
7.1876
Total magnetisation
2.0000
μB

Additional Information

Prototype ID

ABC2D8_243_spg82

Decomposition

Sm2Ge2O7 Np2O5 GeO2

Computed at

2023-01-03 03:08:29.893381

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: agm004886428).

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 agm004886428
data_agm004886428
_cell_length_a     5.98478
_cell_length_b     5.98478
_cell_length_c     5.98478
_cell_angle_alpha  107.03048
_cell_angle_beta   107.03048
_cell_angle_gamma  114.47142
_cell_volume       164.06410
_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
  Sm1 Sm 0.00000 0.00000 0.00000 1.00000
  Np1 Np 0.25000 0.75000 0.50000 1.00000
  Ge1 Ge 0.75000 0.25000 0.50000 1.00000
  Ge2 Ge 0.50000 0.50000 0.00000 1.00000
  O1 O 0.38183 0.06041 0.32142 1.00000
  O2 O 0.32290 0.51429 0.19138 1.00000
  O3 O 0.32290 0.13152 0.80862 1.00000
  O4 O 0.73899 0.06041 0.67858 1.00000
  O5 O 0.86848 0.67710 0.19138 1.00000
  O6 O 0.93959 0.26101 0.32142 1.00000
  O7 O 0.93959 0.61817 0.67858 1.00000
  O8 O 0.48571 0.67710 0.80862 1.00000
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