Material:

CoAs2

ID:

MMD-1305

Explore database:

Compounds with the same formula: CoAs2 (2 entries found)
Compounds with the same elements: Co-As (9 entries found)
Navigation:
Space group | Lattice parameters | Thermodynamic properties | Phase diagram | Magnetic properties | Atomic positions and site-specific magnetic data | Pair-wise magnetic data | Methods | References

Space group:

Crystal system

orthorhombic

Space group number

58

Hermann-Mauguin

Pnnm

Hall

-P 2 2n

Point group

mmm

Structure data:

Normalized formula

CoAs2

The number of formula units per unit cell

2

The total number of atoms per unit cell

6

The number of inequivalent sites per unit cell

2

Structure search

MP

Lattice parameters:

a (Å)

5.1241

b (Å)

5.9067

c (Å)

3.1183

α (deg.)

90.000

β (deg.)

90.000

γ (deg.)

90.000

Volume (Å3)

94.381

Density (g/cm3)

7.346

Crystal structure visualization:

Thermodynamic properties:

DFT calculations (details)

Formation energy (vs. elemental phases)

-287.5 meV/atom

Formation energy above hull

19.8 meV/atom

Phase diagram:

Phase diagram

Related structures:

Compounds with the same formula: CoAs2

2 entries found

Compounds with the same elements: Co-As

9 entries found

Magnetic properties:

DFT calculations (details)

Magnetic ordering

non-magnetic

Total magnetic moment

0.00 μB/cell

Averaged magnetic moment

0.00 μB/atom

Magnetic polarization, Js = μ0Ms

0.00 T (= 0.0 emu/cm3)
Data for the Curie temperature are not available for this entry.
Data for the magnetic anisotropy are not available for this entry.

Atomic positions (fractional coordinates) and site-specific magnetic data:

index species w x y z m (μB) Esoc100 (meV) Esoc001 (meV)
1 Co 2a 0.500000 0.500000 0.500000 -0.00 . .
2 Co 2a 0.000000 0.000000 0.000000 -0.00 . .
3 As 4g 0.500000 0.688653 0.136208 0.00 . .
4 As 4g 0.500000 0.311347 0.863792 0.00 . .
5 As 4g 0.000000 0.188653 0.363792 0.00 . .
6 As 4g 0.000000 0.811347 0.636208 0.00 . .
w: site multiplicity (the number of equivalent positions) and Wyckoff letter (a label for site symmetry)
m: local magnetic moment
Esoc100 (001): Spin-orbit coupling energy for the magnetization oriented along the crystallographic a (c) axis
(Individual Esoc values are temporarily not available while we perform maintenance.)
Terms and conditions

Site-resolved magnetic moments:

Local magnetic moments

Pair-wise magnetic data:

site i site j distance (Å) Jij (meV)
1 Co 2a 2 Co 2a 4.21 .
1 Co 2a 3 As 4g 1.59 .
1 Co 2a 4 As 4g 1.59 .
1 Co 2a 5 As 4g 3.18 .
1 Co 2a 6 As 4g 3.18 .
2 Co 2a 3 As 4g 3.18 .
2 Co 2a 4 As 4g 3.18 .
2 Co 2a 5 As 4g 1.59 .
2 Co 2a 6 As 4g 1.59 .
3 As 4g 4 As 4g 2.39 .
3 As 4g 5 As 4g 3.97 .
3 As 4g 6 As 4g 3.09 .
4 As 4g 5 As 4g 3.09 .
4 As 4g 6 As 4g 3.97 .
5 As 4g 6 As 4g 2.39 .
Jij: magnetic exchange parameter between site i and j (Individual Jij values are temporarily not available while we perform maintenance.)
Export data (under construction)
  • csv
  • json
  • yaml
Terms and conditions

Pair-resolved magnetic exchange parameters:


Diagram is not available for this entry.

Individual exchange parameters:


Diagram is not available for this entry.

Methods:

DFT calculations

  • exchange-correlation energy functional: GGA-PBE
  • pseudopotential type: PAW
  • cutoff energy: 65.0 Ry
  • k-point grid: (kx, ky, kz) = (None, None, None) for magnetic anisotropy calculations
  • package: QE (v6.3)

LMTO-GF calculations

  • k-point grid: (kx, ky, kz) =
  • energy mesh: 41 points on an elliptical contour
  • package: Questaal (v7)

References:

References

Materials Project: mp-1018672
You can download and use the data of this database for your scientific work, provided that you express proper acknowledgements: