RbMg6Ti

High-Entropy Materials HEA Traditional Materials TRA

MP-ID: mp-1021383 · Space group: P4/mmm (#123)

Materials Project API

Basic Information

Formula

RbMg6Ti

MP-ID

mp-1021383

Elements

Sites

Density

2.1814

g/cm³

Volume

212.51

Å³

Cell a

6.9007

Cell b

6.9007

Cell c

4.4628

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

Stability

Packing Fraction

X-ray Diffraction

Diffraction Pattern

Target / Radiation

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

Diffraction Peaks (Top 24)

2θ	d (Å)	I	hkl
18.18	4.8795	21.6	(1,1,0)
19.89	4.4628	7.8	(0,0,1)
23.74	3.7474	11.1	(1,0,1)
25.82	3.4503	10.4	(2,0,0)
27.08	3.2931	12.9	(1,1,1)
28.93	3.0861	6.3	(2,1,0)
32.81	2.7297	100.0	(2,0,1)
36.84	2.4398	33.8	(2,2,0)
39.16	2.3002	4.2	(3,0,0)
40.42	2.2314	14.8	(0,0,2)
41.38	2.1822	3.1	(3,1,0)
42.22	2.1407	6.4	(2,2,1)
44.66	2.0293	4.0	(1,1,2)
46.31	1.9604	8.7	(3,1,1)
48.59	1.8737	3.4	(2,0,2)
50.47	1.8082	2.8	(2,1,2)
51.99	1.7590	6.5	(3,2,1)
53.09	1.7252	9.7	(4,0,0)
55.83	1.6466	19.2	(2,2,2)
56.59	1.6265	1.9	(3,3,0)
57.25	1.6091	3.5	(4,0,1)
57.55	1.6016	2.7	(3,0,2)
58.94	1.5671	1.4	(4,1,1)
59.23	1.5601	2.0	(3,1,2)

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Energy Properties

Formation Energy/atom

0.31866

eV/atom

Energy/atom

-2.01369

eV/atom

Energy above Hull

0.3187

eV/atom

Uncorrected Energy

-2.0137

eV/atom

Volume/atom

26.56

Å³

c/a Ratio

0.6467

Electronic Properties

Metallic

Metal

Band Gap

Direct Gap

CBM

N/A

Magnetic Properties

Magnetic

Yes

Total Mag. Moment

2.1054

μB

Mag. Ordering

Mag. Sites

Magnetization/Volume

0.009910

μB/Å³

Elastic Properties

Elastic data not available

Feature Analysis

Composition Overview

Element Composition (atomic fraction)

Composition Info

Major / Matrix Element

Mg · 0.750

Element Family

Alkali-AlkEarth

Solute Fraction

0.250

Interstitial Fraction

0.000

High-Entropy Alloy Features

Composite Radar (normalized)

Element-Class Share

Mix Entropy ΔS/R

0.7356

HEA criterion (>1.0 = high entropy)

Mix Entropy ΔS

6.1160

J/mol·K

Ω Parameter

1.1346

Ω > 1.1 favors solid solution

Atomic Size Mismatch δr

15.363%

δr < 6.6% favors single-phase solid solution

Electronegativity Diff Δχ

0.1886

smaller = more stable mixing

VEC

2.125

valence electron concentration, affects phase stability

Mix Enthalpy ΔH_mix

5.250

kJ/mol; negative = exothermic mixing

Entropy Norm

0.6696

SS Former

Phase Tendency

Traditional Material Features

ROM Blended-Feature Radar

Rating & Classification

Tier

Score

0.589

Family

Mg-based Alloy

Matrix Element

Mg · 0.750

Related Tasks

Related computation task IDs (2)

aaacgdfr aaacgdrn

Citation & References

Materials Project Page

https://materialsproject.org/materials/mp-1021383

Reference Citation

The crystal structure and related material properties of RbMg6Ti were obtained from the Materials Project database (MP-ID: mp-1021383, 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

Loading 3D structure…

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Raw CIF Data

# generated using pymatgen
data_RbMg6Ti
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.90064900
_cell_length_b   6.90064900
_cell_length_c   4.46276500
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbMg6Ti
_chemical_formula_sum   'Rb1 Mg6 Ti1'
_cell_volume   212.51221295
_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
  Rb  Rb0  1  0.50000000  0.50000000  0.50000000  1.0
  Mg  Mg1  1  0.00000000  0.50000000  0.50000000  1.0
  Mg  Mg2  1  0.50000000  0.00000000  0.50000000  1.0
  Mg  Mg3  1  0.21457000  0.78543000  0.00000000  1.0
  Mg  Mg4  1  0.78543000  0.21457000  0.00000000  1.0
  Mg  Mg5  1  0.21457000  0.21457000  0.00000000  1.0
  Mg  Mg6  1  0.78543000  0.78543000  0.00000000  1.0
  Ti  Ti7  1  0.00000000  0.00000000  0.50000000  1.0

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