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Mg4Si7

Alexandria ALEX

Alex-ID: agm005285793 · Space group: Pm (#6)

Alexandria Database API

Basic Information

Formula
Mg4Si7
Alex-ID
agm005285793
Elements
2
Sites
22
Space group
Pm (#6)
Crystal system
monoclinic
Volume
395.55
ų
Cell a
3.8488
Å
Cell b
7.0269
Å
Cell c
15.2449
Å
α angle
73.61
°
β angle
90.00
°
γ angle
90.00
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
Mg4Si7
Mg
8.00 · 36.4%
Si
14.00 · 63.6%

Energy & Stability

Energy above hull
0.2032
eV/atom
Formation energy
0.1176
eV/atom
Corrected total energy
-86.0919
eV
Raw total energy
-86.0919
eV

Electronic Structure

Indirect band gap
0.0000
eV
Direct band gap
0.0230
eV
DOS at Fermi level
7.6493
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

A4B7_195_spg6

Decomposition

Mg2Si Si

Computed at

2023-05-09 01:40:58.156445

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: agm005285793).

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 agm005285793
data_agm005285793
_cell_length_a     3.84877
_cell_length_b     7.02688
_cell_length_c     15.24494
_cell_angle_alpha  73.61480
_cell_angle_beta   90.00000
_cell_angle_gamma  90.00000
_cell_volume       395.55201
_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
  Mg1 Mg 0.00000 0.12121 0.99461 1.00000
  Mg2 Mg 0.50000 0.48261 0.49628 1.00000
  Mg3 Mg 0.00000 0.76446 0.33967 1.00000
  Mg4 Mg 0.00000 0.22143 0.65377 1.00000
  Mg5 Mg 0.50000 0.11660 0.82523 1.00000
  Mg6 Mg 0.50000 0.86363 0.15701 1.00000
  Mg7 Mg 0.00000 0.21210 0.42212 1.00000
  Mg8 Mg 0.00000 0.73960 0.57968 1.00000
  Si1 Si 0.50000 0.75609 0.95435 1.00000
  Si2 Si 0.50000 0.28201 0.08763 1.00000
  Si3 Si 0.00000 0.72206 0.05219 1.00000
  Si4 Si 0.50000 0.43098 0.92778 1.00000
  Si5 Si 0.50000 0.07230 0.55631 1.00000
  Si6 Si 0.50000 0.88755 0.44644 1.00000
  Si7 Si 0.00000 0.14789 0.19211 1.00000
  Si8 Si 0.00000 0.81890 0.80291 1.00000
  Si9 Si 0.50000 0.48533 0.69031 1.00000
  Si10 Si 0.50000 0.48867 0.30172 1.00000
  Si11 Si 0.00000 0.48903 0.19967 1.00000
  Si12 Si 0.00000 0.44008 0.81941 1.00000
  Si13 Si 0.50000 0.83363 0.70340 1.00000
  Si14 Si 0.50000 0.12020 0.30100 1.00000
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