Ho3Np
Traditional Materials TRAMP-ID: mp-1184795 · Space group: P6_3/mmc (#194)
Basic Information
Formula
Ho3Np
MP-ID
mp-1184795
Elements
2
Sites
8
Density
10.1332
g/cm³
Volume
239.84
ų
Cell a
7.0160
Å
Cell b
7.0160
Å
Cell c
5.6261
Å
α Angle
90.00
°
β Angle
90.00
°
γ Angle
120.00
°
Space Group
P6_3/mmc
Point Group
6/mmm
Crystal System
Hexagonal
Bravais Lattice
hP
Stability
No
Packing Fraction
0.7405
X-ray Diffraction
Diffraction Pattern
X-axis: 2θ (°); Y-axis: relative intensity; Cu Kα ; λ=1.5418 Å
Diffraction Peaks (Top 24)
| 2θ | d (Å) | I | hkl |
|---|---|---|---|
| 14.58 | 6.0761 | 2.3 | (1,0,-1,0) |
| 21.53 | 4.1282 | 3.3 | (1,0,-1,1) |
| 25.39 | 3.5080 | 1.8 | (2,-1,-1,0) |
| 29.40 | 3.0380 | 35.2 | (2,0,-2,0) |
| 31.81 | 2.8131 | 38.3 | (0,0,0,2) |
| 33.52 | 2.6732 | 100.0 | (2,0,-2,1) |
| 33.52 | 2.6732 | 50.0 | (2,-2,0,1) |
| 41.13 | 2.1946 | 1.1 | (2,-1,-1,2) |
| 42.52 | 2.1262 | 1.9 | (3,-1,-2,1) |
| 43.86 | 2.0641 | 24.0 | (2,0,-2,2) |
| 52.15 | 1.7540 | 29.0 | (4,-2,-2,0) |
| 57.77 | 1.5958 | 32.2 | (2,0,-2,3) |
| 61.00 | 1.5190 | 4.5 | (4,0,-4,0) |
| 62.39 | 1.4884 | 34.0 | (4,-2,-2,2) |
| 63.43 | 1.4665 | 16.2 | (4,0,-4,1) |
| 63.43 | 1.4665 | 8.1 | (4,-4,0,1) |
| 66.47 | 1.4065 | 4.7 | (0,0,0,4) |
| 70.45 | 1.3366 | 5.9 | (4,0,-4,2) |
| 74.31 | 1.2764 | 5.1 | (2,0,-2,4) |
| 81.55 | 1.1804 | 12.1 | (4,0,-4,3) |
| 84.35 | 1.1483 | 1.2 | (4,2,-6,0) |
| 84.35 | 1.1483 | 2.5 | (6,-2,-4,0) |
| 86.51 | 1.1251 | 21.3 | (6,-2,-4,1) |
| 89.27 | 1.0973 | 13.4 | (4,-2,-2,4) |
Energy Properties
Formation Energy/atom
0.35316
eV/atom
Energy/atom
-45.06390
eV/atom
Energy above Hull
0.3532
eV/atom
Uncorrected Energy
-6.3206
eV/atom
Volume/atom
29.98
ų
c/a Ratio
0.8019
Electronic Properties
Metallic
Metal
Band Gap
0
eV
Direct Gap
No
CBM
N/A
eV
Magnetic Properties
Magnetic
Yes
Total Mag. Moment
9.9852
μB
Mag. Ordering
FM
Mag. Sites
8
Magnetization/Volume
0.041630
μB/ų
Elastic Properties
Elastic data not available
Feature Analysis
Composition Overview
Element Composition (atomic fraction)
Composition Info
Major / Matrix Element
Ho · 0.750
Element Family
N/A
Solute Fraction
0.250
Interstitial Fraction
0.000
Traditional Material Features
ROM Blended-Feature Radar
Rating & Classification
Tier
A
Score
0.441
Family
Binary Alloy
Matrix Element
Ho · 0.750
Related Tasks
Citation & References
Materials Project Page
https://materialsproject.org/materials/mp-1184795
Reference Citation
The crystal structure and related material properties of Ho3Np were obtained from the Materials Project database (MP-ID: mp-1184795, 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_Ho3Np
_symmetry_space_group_name_H-M 'P 1'
_cell_length_a 7.01601369
_cell_length_b 7.01601369
_cell_length_c 5.62613700
_cell_angle_alpha 90.00000000
_cell_angle_beta 90.00000000
_cell_angle_gamma 119.99999708
_symmetry_Int_Tables_number 1
_chemical_formula_structural Ho3Np
_chemical_formula_sum 'Ho6 Np2'
_cell_volume 239.84010376
_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
Ho Ho0 1 0.83125200 0.16874800 0.75000000 1.0
Ho Ho1 1 0.33749700 0.16874800 0.75000000 1.0
Ho Ho2 1 0.66250300 0.83125200 0.25000000 1.0
Ho Ho3 1 0.83125200 0.66250300 0.75000000 1.0
Ho Ho4 1 0.16874800 0.83125200 0.25000000 1.0
Ho Ho5 1 0.16874800 0.33749700 0.25000000 1.0
Np Np6 1 0.33333300 0.66666700 0.75000000 1.0
Np Np7 1 0.66666700 0.33333300 0.25000000 1.0
