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NpPa3Si7

Alexandria ALEX

Alex-ID: agm005992595 · Space group: Cmcm (#63)

Alexandria Database API

Basic Information

Formula
NpPa3Si7
Alex-ID
agm005992595
Elements
3
Sites
22
Space group
Cmcm (#63)
Crystal system
orthorhombic
Volume
429.47
ų
Cell a
4.1091
Å
Cell b
9.4099
Å
Cell c
11.3818
Å
α angle
90.00
°
β angle
90.00
°
γ angle
102.61
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
NpPa3Si7
Np
2.00 · 9.1%
Pa
6.00 · 27.3%
Si
14.00 · 63.6%

Energy & Stability

Energy above hull
0.1433
eV/atom
Formation energy
-0.3491
eV/atom
Corrected total energy
-166.4770
eV
Raw total energy
-166.4770
eV

Electronic Structure

Indirect band gap
0.0000
eV
Direct band gap
0.0031
eV
DOS at Fermi level
34.8370
Total magnetisation
8.2724
μB

Additional Information

Prototype ID

AB3C7_168_spg63

Decomposition

PaSi2 NpSi

Computed at

2023-08-12 21:53:23.491589

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: agm005992595).

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 agm005992595
data_agm005992595
_cell_length_a     4.10908
_cell_length_b     9.40986
_cell_length_c     11.38176
_cell_angle_alpha  90.00000
_cell_angle_beta   90.00000
_cell_angle_gamma  102.61151
_cell_volume       429.46761
_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
  Np1 Np 0.96337 0.92673 0.25000 1.00000
  Np2 Np 0.03663 0.07327 0.75000 1.00000
  Pa1 Pa 0.10872 0.21743 0.45549 1.00000
  Pa2 Pa 0.89128 0.78257 0.54451 1.00000
  Pa3 Pa 0.23499 0.46997 0.75000 1.00000
  Pa4 Pa 0.76501 0.53003 0.25000 1.00000
  Pa5 Pa 0.10872 0.21743 0.04451 1.00000
  Pa6 Pa 0.89128 0.78257 0.95549 1.00000
  Si1 Si 0.39917 0.79834 0.75000 1.00000
  Si2 Si 0.60083 0.20166 0.25000 1.00000
  Si3 Si 0.50147 0.00293 0.40032 1.00000
  Si4 Si 0.49853 0.99707 0.59968 1.00000
  Si5 Si 0.49853 0.99707 0.90032 1.00000
  Si6 Si 0.50147 0.00293 0.09968 1.00000
  Si7 Si 0.37389 0.74778 0.35318 1.00000
  Si8 Si 0.62611 0.25222 0.64682 1.00000
  Si9 Si 0.26959 0.53918 0.46400 1.00000
  Si10 Si 0.73041 0.46082 0.53600 1.00000
  Si11 Si 0.73041 0.46082 0.96400 1.00000
  Si12 Si 0.26959 0.53918 0.03600 1.00000
  Si13 Si 0.37389 0.74778 0.14682 1.00000
  Si14 Si 0.62611 0.25222 0.85318 1.00000
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