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BaCaO2

Elasticity Data ELA

MP-ID: mp-1018097 · Space group: P4/mmm (#123)

Basic Information

Formula
BaCaO2
MP-ID
mp-1018097
Elements
3
Sites
4
Density
4.6325
g/cm³
Volume
75.06
ų
Cell a
3.7603
Å
Cell b
3.7603
Å
Cell c
5.3085
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P4/mmm
Point Group
4/mmm
Crystal System
Tetragonal
Bravais Lattice
Tetragonal P
Stability
No
Packing Fraction
0.6800

X-ray Diffraction

Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; CuKa ; λ=1.5406 Å
Diffraction Peaks (Top 24)
2θd (Å)Ihkl
16.70 5.3085 36.9 (0,0,1)
23.66 3.7603 33.4 (1,0,0)
29.10 3.0685 100.0 (1,0,1)
33.71 2.6589 75.1 (1,1,0)
33.77 2.6543 37.4 (0,0,2)
37.84 2.3774 20.2 (1,1,1)
41.65 2.1685 15.6 (1,0,2)
48.41 1.8802 25.2 (2,0,0)
48.46 1.8785 50.3 (1,1,2)
51.57 1.7723 8.5 (2,0,1)
51.66 1.7695 2.1 (0,0,3)
54.57 1.6817 7.3 (2,1,0)
57.49 1.6031 30.7 (2,1,1)
57.57 1.6011 15.3 (1,0,3)
60.33 1.5342 25.0 (2,0,2)
63.11 1.4731 4.8 (1,1,3)
65.73 1.4206 8.6 (2,1,2)
70.88 1.3295 7.5 (2,2,0)
71.03 1.3271 3.7 (0,0,4)
73.42 1.2896 3.2 (2,2,1)
73.49 1.2886 3.2 (2,0,3)
75.91 1.2534 1.5 (3,0,0)
76.05 1.2515 2.9 (1,0,4)
78.39 1.2199 6.5 (3,0,1)
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Energy Properties

Formation Energy/atom
-2.86534
eV/atom
Energy/atom
-6.32047
eV/atom
Energy above Hull
0.1995
eV/atom
Uncorrected Energy
-5.9770
eV/atom
Volume/atom
18.77
ų
c/a Ratio
1.4117

Electronic Properties

Metallic
Non-metal
Band Gap
2.140
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
No
Total Mag. Moment
0.0000
μB
Mag. Ordering
NM
Mag. Sites
0
Magnetization/Volume
0.000000
μB/ų

Elastic Properties

KVRH
80.465
GPa
GVRH
47.510
GPa
Young's Modulus E
119.091
GPa
Poisson Ratio ν
0.253
Pugh Ratio K/G
1.694
Vickers Hardness Est.
7.333
GPa
Ductility
Ductile
Anisotropy
0.010
Lame λ
48.792
GPa

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.500
Element Family
Metalloid-Nonmetal
Solute Fraction
0.500
Interstitial Fraction
0.000

Elasticity Features

Elastic Modulus Comparison (GPa)
Elastic Features
Elastic Anisotropy AU
0.0100
Homogeneous Poisson ν
0.2530
Debye Temperature
691.3
K
Sound Velocity
3,556.7
m/s
Homogeneity
0.2530

Related Tasks

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1018097
Reference Citation

The crystal structure and related material properties of BaCaO2 were obtained from the Materials Project database (MP-ID: mp-1018097, database version v2026.04.13).

Literature Citation

Horton, M.K., Huck, P., Yang, R.X. et al. Accelerated data-driven materials science with the Materials Project. Nat. Mater. 24, 1522–1532 (2025). https://doi.org/10.1038/s41563-025-02272-0

BibTeX
@article{Horton2025,
  author  = {Horton, Matthew K. and Huck, Patrick and Yang, Ruo Xi and Munro, Jason M. and Dwaraknath, Shyam and Ganose, Alex M. and Kingsbury, Ryan S. and Wen, Mingjian and Shen, Jimmy X. and Mathis, Tyler S. and Kaplan, Aaron D. and Berket, Karlo and Riebesell, Janosh and George, Janine and Rosen, Andrew S. and Spotte-Smith, Evan W. C. and McDermott, Matthew J. and Cohen, Orion A. and Dunn, Alex and Kuner, Matthew C. and Rignanese, Gian-Marco and Petretto, Guido and Waroquiers, David and Griffin, Sinead M. and Neaton, Jeffrey B. and Chrzan, Daryl C. and Asta, Mark and Hautier, Geoffroy and Cholia, Shreyas and Ceder, Gerbrand and Ong, Shyue Ping and Jain, Anubhav and Persson, Kristin A.},
  title   = {Accelerated data-driven materials science with the Materials Project},
  journal = {Nature Materials},
  year    = {2025},
  volume  = {24},
  number  = {10},
  pages   = {1522--1532},
  month   = {oct},
  doi     = {10.1038/s41563-025-02272-0},
  issn    = {1476-4660},
  url     = {https://doi.org/10.1038/s41563-025-02272-0},
  abstract = {The Materials Project was launched formally in 2011 to drive materials discovery forwards through high-throughput computation and open data. More than a decade later, the Materials Project has become an indispensable tool used by more than 600,000 materials researchers around the world. This Perspective describes how the Materials Project, as a data platform and a software ecosystem, has helped to shape research in data-driven materials science. We cover how sustainable software and computational methods have accelerated materials design while becoming more open source and collaborative in nature. Next, we present cases where the Materials Project was used to understand and discover functional materials. We then describe our efforts to meet the needs of an expanding user base, through technical infrastructure updates ranging from data architecture and cloud resources to interactive web applications. Finally, we discuss opportunities to better aid the research community, with the vision that more accessible and easy-to-understand materials data will result in democratized materials knowledge and an increasingly collaborative community.}
}

3D Crystal Structure Rendering

Loading 3D structure…

Style: Ball & Stick
Raw CIF Data
# generated using pymatgen
data_BaCaO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.76031100
_cell_length_b   3.76031100
_cell_length_c   5.30851800
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaCaO2
_chemical_formula_sum   'Ba1 Ca1 O2'
_cell_volume   75.06211973
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ba  Ba0  1  0.50000000  0.50000000  0.00000000  1.0
  Ca  Ca1  1  0.00000000  0.00000000  0.50000000  1.0
  O  O2  1  0.00000000  0.00000000  0.00000000  1.0
  O  O3  1  0.50000000  0.50000000  0.50000000  1.0
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