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Mg4Si7

Alexandria ALEX

Alex-ID: agm005266973 · Space group: Cm (#8)

Alexandria Database API

Basic Information

Formula
Mg4Si7
Alex-ID
agm005266973
Elements
2
Sites
22
Space group
Cm (#8)
Crystal system
monoclinic
Volume
397.89
ų
Cell a
14.9297
Å
Cell b
14.9297
Å
Cell c
6.6573
Å
α angle
87.09
°
β angle
87.09
°
γ angle
15.57
°

Composition

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

Energy & Stability

Energy above hull
0.1816
eV/atom
Formation energy
0.0960
eV/atom
Corrected total energy
-86.5672
eV
Raw total energy
-86.5672
eV

Electronic Structure

Indirect band gap
0.0000
eV
Direct band gap
0.1138
eV
DOS at Fermi level
6.2273
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

A4B7_189_spg8

Decomposition

Mg2Si Si

Computed at

2023-05-09 01:25:45.703125

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: agm005266973).

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 agm005266973
data_agm005266973
_cell_length_a     14.92973
_cell_length_b     14.92973
_cell_length_c     6.65727
_cell_angle_alpha  87.09293
_cell_angle_beta   87.09293
_cell_angle_gamma  15.57454
_cell_volume       397.88842
_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 0.81520 0.81520 0.82301 1.00000
  Mg2 Mg 0.61001 0.61001 0.55250 1.00000
  Mg3 Mg 0.04364 0.04364 0.71393 1.00000
  Mg4 Mg 0.18404 0.18404 0.35103 1.00000
  Mg5 Mg 0.77351 0.77351 0.32646 1.00000
  Mg6 Mg 0.40084 0.40084 0.79719 1.00000
  Mg7 Mg 0.06554 0.06554 0.25276 1.00000
  Mg8 Mg 0.14634 0.14634 0.85970 1.00000
  Si1 Si 0.33356 0.33356 0.49791 1.00000
  Si2 Si 0.33625 0.33625 0.12389 1.00000
  Si3 Si 0.88060 0.88060 0.49287 1.00000
  Si4 Si 0.88436 0.88436 0.12597 1.00000
  Si5 Si 0.63371 0.63371 0.16653 1.00000
  Si6 Si 0.57293 0.57293 0.94701 1.00000
  Si7 Si 0.96044 0.96044 0.97392 1.00000
  Si8 Si 0.25668 0.25668 0.02019 1.00000
  Si9 Si 0.70322 0.70322 0.64278 1.00000
  Si10 Si 0.50111 0.50111 0.46996 1.00000
  Si11 Si 0.95738 0.95738 0.59978 1.00000
  Si12 Si 0.25609 0.25609 0.64782 1.00000
  Si13 Si 0.70846 0.70846 0.00748 1.00000
  Si14 Si 0.49548 0.49548 0.10373 1.00000
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