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Pm2NpSiO8

Alexandria ALEX

Alex-ID: agm004890965 · Space group: P-3m1 (#164)

Alexandria Database API

Basic Information

Formula
Pm2NpSiO8
Alex-ID
agm004890965
Elements
4
Sites
12
Space group
P-3m1 (#164)
Crystal system
trigonal
Volume
145.48
ų
Cell a
5.2932
Å
Cell b
5.2932
Å
Cell c
5.9957
Å
α angle
90.00
°
β angle
90.00
°
γ angle
120.00
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
Pm2NpSiO8
Pm
2.00 · 16.7%
Np
1.00 · 8.3%
Si
1.00 · 8.3%
O
8.00 · 66.7%

Energy & Stability

Energy above hull
0.7279
eV/atom
Formation energy
-2.8542
eV/atom
Corrected total energy
-101.7807
eV
Raw total energy
-96.1624
eV

Electronic Structure

Indirect band gap
0.0000
eV
Direct band gap
0.0237
eV
DOS at Fermi level
13.3030
Total magnetisation
3.2061
μB

Additional Information

Prototype ID

ABC2D8_312_spg164

Decomposition

Pm2Si2O7 PmNpO5 PmNpO4

Computed at

2023-01-06 09:08:51.172930

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: agm004890965).

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 agm004890965
data_agm004890965
_cell_length_a     5.29315
_cell_length_b     5.29315
_cell_length_c     5.99572
_cell_angle_alpha  90.00000
_cell_angle_beta   90.00000
_cell_angle_gamma  120.00000
_cell_volume       145.47895
_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 0.66667 0.33333 0.13052 1.00000
  Pm2 Pm 0.33333 0.66667 0.86948 1.00000
  Np1 Np 0.00000 0.00000 0.50000 1.00000
  Si1 Si 0.00000 0.00000 0.00000 1.00000
  O1 O 0.84679 0.69359 0.81912 1.00000
  O2 O 0.30641 0.15321 0.81912 1.00000
  O3 O 0.84679 0.15321 0.81912 1.00000
  O4 O 0.15321 0.30641 0.18088 1.00000
  O5 O 0.69359 0.84679 0.18088 1.00000
  O6 O 0.15321 0.84679 0.18088 1.00000
  O7 O 0.66667 0.33333 0.47717 1.00000
  O8 O 0.33333 0.66667 0.52283 1.00000
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