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HfMg6BO7

High-Entropy Materials HEA

MP-ID: mp-1033223 · Space group: P4mm (#99)

Basic Information

Formula
HfMg6BO7
MP-ID
mp-1033223
Elements
4
Sites
15
Density
4.5213
g/cm³
Volume
164.22
ų
Cell a
8.8963
Å
Cell b
4.2964
Å
Cell c
4.2964
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
90.00
°
Space Group
P4mm
Point Group
4mm
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
9.94 8.8963 100.0 (1,0,0)
19.96 4.4481 22.2 (2,0,0)
20.67 4.2964 22.4 (0,1,0)
22.99 3.8688 77.4 (1,1,0)
28.89 3.0903 34.0 (2,1,0)
29.40 3.0380 9.7 (0,1,1)
30.14 2.9654 15.1 (3,0,0)
31.11 2.8750 42.8 (1,1,1)
35.79 2.5087 41.4 (2,1,1)
36.83 2.4405 22.6 (3,1,0)
40.56 2.2241 28.2 (4,0,0)
42.06 2.1482 55.9 (0,2,0)
42.60 2.1221 9.3 (3,1,1)
43.33 2.0882 12.7 (1,2,0)
45.95 1.9751 5.5 (4,1,0)
46.97 1.9344 9.2 (2,2,0)
47.31 1.9214 5.5 (0,2,1)
48.47 1.8781 22.0 (1,2,1)
50.88 1.7946 5.4 (4,1,1)
51.35 1.7793 1.1 (5,0,0)
51.83 1.7639 13.1 (2,2,1)
52.61 1.7397 12.9 (3,2,0)
55.93 1.6439 8.2 (5,1,0)
57.12 1.6125 13.1 (3,2,1)
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Energy Properties

Formation Energy/atom
-2.23485
eV/atom
Energy/atom
-6.30519
eV/atom
Energy above Hull
0.6996
eV/atom
Uncorrected Energy
-5.9846
eV/atom
Volume/atom
10.95
ų
c/a Ratio
0.4829

Electronic Properties

Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV

Magnetic Properties

Magnetic
Yes
Total Mag. Moment
0.9844
μB
Mag. Ordering
FM
Mag. Sites
1
Magnetization/Volume
0.005990
μB/ų

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
O · 0.467
Element Family
Metalloid-Nonmetal
Solute Fraction
0.533
Interstitial Fraction
0.067

High-Entropy Alloy Features

Composite Radar (normalized)
Element-Class Share
Mix Entropy ΔS/R
1.0833
HEA criterion (>1.0 = high entropy)
Mix Entropy ΔS
9.0062
J/mol·K
Ω Parameter
1.3703
Ω > 1.1 favors solid solution
Atomic Size Mismatch δr
44.652%
δr < 6.6% favors single-phase solid solution
Electronegativity Diff Δχ
1.0330
smaller = more stable mixing
VEC
3.133
valence electron concentration, affects phase stability
Mix Enthalpy ΔH_mix
-4.722
kJ/mol; negative = exothermic mixing
Entropy Norm
0.7814
SS Former
0
Phase Tendency
IM

Related Tasks

Related computation task IDs (2)

Citation & References

Materials Project Page
https://materialsproject.org/materials/mp-1033223
Reference Citation

The crystal structure and related material properties of HfMg6BO7 were obtained from the Materials Project database (MP-ID: mp-1033223, 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_HfMg6BO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.89628863
_cell_length_b   4.29637838
_cell_length_c   4.29637838
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfMg6BO7
_chemical_formula_sum   'Hf1 Mg6 B1 O7'
_cell_volume   164.21541025
_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
  Hf  Hf0  1  0.49385441  0.00000000  -0.00000000  1.0
  Mg  Mg1  1  0.99678963  0.50000000  0.50000000  1.0
  Mg  Mg2  1  0.49462067  0.50000000  0.50000000  1.0
  Mg  Mg3  1  0.22552902  0.00000000  0.50000000  1.0
  Mg  Mg4  1  0.76941127  0.00000000  0.50000000  1.0
  Mg  Mg5  1  0.22552902  0.50000000  0.00000000  1.0
  Mg  Mg6  1  0.76941127  0.50000000  -0.00000000  1.0
  B  B7  1  0.04340452  0.00000000  -0.00000000  1.0
  O  O8  1  0.72961393  0.00000000  -0.00000000  1.0
  O  O9  1  0.24711313  0.50000000  0.50000000  1.0
  O  O10  1  0.75024799  0.50000000  0.50000000  1.0
  O  O11  1  0.99831167  0.00000000  0.50000000  1.0
  O  O12  1  0.50392590  0.00000000  0.50000000  1.0
  O  O13  1  0.99831167  0.50000000  0.00000000  1.0
  O  O14  1  0.50392590  0.50000000  0.00000000  1.0
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