Sb2Pb2O7

高熵材料 HEA 传统材料 TRA

MP-ID: mp-647374 · Space group: Fd-3m (#227)

Materials Project API

Basic Information

Formula

Sb2Pb2O7

MP-ID

mp-647374

Elements

Sites

Density

8.2553

g/cm³

Volume

309.73

Å³

Cell a

7.5945

Cell b

7.5945

Cell c

7.5945

α Angle

60.00

β Angle

60.00

γ Angle

60.00

Space Group

Fd-3m

Point Group

m-3m

Crystal System

Cubic

Bravais Lattice

Stability

Packing Fraction

0.7405

X-ray Diffraction

Diffraction Pattern

Target / Radiation

X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å

Diffraction Peaks (Top 16)

2θ	d (Å)	I	hkl
14.28	6.2009	3.2	(1,1,1)
27.54	3.2383	6.5	(2,2,1)
28.79	3.1005	100.0	(2,2,2)
33.37	2.6851	35.2	(2,2,0)
36.47	2.4640	3.2	(3,2,2)
43.80	2.0670	3.6	(3,3,3)
47.91	1.8986	48.8	(4,2,2)
50.26	1.8154	1.4	(4,3,2)
56.87	1.6192	45.2	(4,4,2)
59.64	1.5502	10.2	(4,4,4)
66.92	1.3983	1.7	(5,4,4)
70.09	1.3425	7.4	(4,4,0)
76.87	1.2402	1.2	(6,4,3)
77.47	1.2320	18.7	(6,4,4)
79.88	1.2008	14.5	(6,4,2)
89.38	1.0962	15.9	(6,6,4)

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Energy Properties

Formation Energy/atom

-1.37804

eV/atom

Energy/atom

-5.95250

eV/atom

Energy above Hull

0.4440

eV/atom

Uncorrected Energy

-5.5153

eV/atom

Volume/atom

14.08

Å³

c/a Ratio

1.0000

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Total Mag. Moment

0.0002

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.000000

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

O · 0.636

Element Family

Metalloid-Nonmetal

Solute Fraction

0.364

Interstitial Fraction

0.000

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.9075

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

7.5452

J/mol·K

Ω Parameter

4.3994

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

50.795%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.6072

smaller = more stable mixing

VEC

4.182

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

-0.529

kJ/mol; negative = exothermic mixing

Entropy Norm

0.8261

SS Former

Phase Tendency

Related Tasks

Related computation task IDs (5)

aaadpepf aaadrdbi aaadzcin aaaetkqq aaafodqj

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-647374

Reference Citation

The crystal structure and related material properties of Sb2Pb2O7 were obtained from the Materials Project database (MP-ID: mp-647374, 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

3D Crystal Structure Rendering

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Raw CIF Data

# generated using pymatgen
data_Sb2Pb2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.59454462
_cell_length_b   7.59454462
_cell_length_c   7.59454462
_cell_angle_alpha   60.00000000
_cell_angle_beta   60.00000000
_cell_angle_gamma   60.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sb2Pb2O7
_chemical_formula_sum   'Sb4 Pb4 O14'
_cell_volume   309.73495206
_cell_formula_units_Z   2
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
  Sb  Sb0  1  0.62500000  0.62500000  0.12500000  1.0
  Sb  Sb1  1  0.62500000  0.12500000  0.62500000  1.0
  Sb  Sb2  1  0.62500000  0.62500000  0.62500000  1.0
  Sb  Sb3  1  0.12500000  0.62500000  0.62500000  1.0
  Pb  Pb4  1  0.12500000  0.62500000  0.12500000  1.0
  Pb  Pb5  1  0.62500000  0.12500000  0.12500000  1.0
  Pb  Pb6  1  0.12500000  0.12500000  0.62500000  1.0
  Pb  Pb7  1  0.12500000  0.12500000  0.12500000  1.0
  O  O8  1  0.97345800  0.52654200  0.97345800  1.0
  O  O9  1  0.27654200  0.72345800  0.72345800  1.0
  O  O10  1  0.52654200  0.97345800  0.97345800  1.0
  O  O11  1  0.52654200  0.97345800  0.52654200  1.0
  O  O12  1  0.52654200  0.52654200  0.97345800  1.0
  O  O13  1  0.27654200  0.72345800  0.27654200  1.0
  O  O14  1  0.50000000  0.50000000  0.50000000  1.0
  O  O15  1  0.97345800  0.52654200  0.52654200  1.0
  O  O16  1  0.27654200  0.27654200  0.72345800  1.0
  O  O17  1  0.72345800  0.27654200  0.27654200  1.0
  O  O18  1  0.75000000  0.75000000  0.75000000  1.0
  O  O19  1  0.72345800  0.72345800  0.27654200  1.0
  O  O20  1  0.72345800  0.27654200  0.72345800  1.0
  O  O21  1  0.97345800  0.97345800  0.52654200  1.0

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