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CaH5

Alexandria ALEX

Alex-ID: agm099055656 · Space group: Pnma (#62)

Basic Information

Formula
CaH5
Alex-ID
agm099055656
Elements
2
Sites
24
Space group
Pnma (#62)
Crystal system
orthorhombic
Volume
223.85
ų
Cell a
4.2927
Å
Cell b
6.1580
Å
Cell c
8.4681
Å
α angle
90.02
°
β angle
90.00
°
γ angle
90.00
°

Composition

Element Composition (atomic fraction)
Composition Info
Formula
CaH5
Ca
4.00 · 16.7%
H
20.00 · 83.3%

Energy & Stability

Energy above hull
0.2197
eV/atom
Formation energy
-0.1502
eV/atom
Corrected total energy
-76.4070
eV
Raw total energy
-76.4070
eV

Electronic Structure

Indirect band gap
0.0000
eV
Direct band gap
0.2057
eV
DOS at Fermi level
4.1599
Total magnetisation
0.0000
μB

Additional Information

Prototype ID

AB5_1995_spg62

Decomposition

CaH10 CaH2

Computed at

2025-06-13 13:39:21

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: agm099055656).

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 agm099055656
data_agm099055656
_cell_length_a     4.29266
_cell_length_b     6.15803
_cell_length_c     8.46810
_cell_angle_alpha  90.01778
_cell_angle_beta   89.99841
_cell_angle_gamma  89.99999
_cell_volume       223.84823
_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
  Ca1 Ca 0.00000 0.95623 0.26184 1.00000
  Ca2 Ca 0.99999 0.04376 0.76153 1.00000
  Ca3 Ca 0.49999 0.54376 0.73813 1.00000
  Ca4 Ca 0.50002 0.45625 0.23845 1.00000
  H1 H 0.26125 0.06235 0.02069 1.00000
  H2 H 0.73871 0.93195 0.00101 1.00000
  H3 H 0.76127 0.43784 0.97928 1.00000
  H4 H 0.23869 0.56822 0.99905 1.00000
  H5 H 0.23849 0.56196 0.47924 1.00000
  H6 H 0.76139 0.43150 0.49895 1.00000
  H7 H 0.73850 0.93785 0.52079 1.00000
  H8 H 0.26140 0.06834 0.50104 1.00000
  H9 H 0.26133 0.93197 0.00097 1.00000
  H10 H 0.73875 0.06234 0.02073 1.00000
  H11 H 0.76129 0.56824 0.99900 1.00000
  H12 H 0.23873 0.43782 0.97932 1.00000
  H13 H 0.23861 0.43153 0.49896 1.00000
  H14 H 0.76151 0.56193 0.47923 1.00000
  H15 H 0.73860 0.06834 0.50106 1.00000
  H16 H 0.26149 0.93786 0.52076 1.00000
  H17 H 0.50000 0.82502 0.25716 1.00000
  H18 H 0.49998 0.17505 0.75725 1.00000
  H19 H 0.00001 0.67498 0.74283 1.00000
  H20 H 0.00001 0.32494 0.24274 1.00000
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