material

Mg2As2O7
ID:

mp-5618
DOI:

10.17188/1272233

Tags: High pressure experimental phase Magnesium diarsenate

Material Details

Final Magnetic Moment
-0.000 μB

Calculated total magnetic moment for the unit cell within the magnetic ordering provided (see below). Typically accurate to the second digit.
Magnetic Ordering
Non-magnetic
Formation Energy / Atom
-2.297 eV

Calculated formation energy from the elements normalized to per atom in the unit cell.

Energy Above Hull / Atom
0.000 eV

The energy of decomposition of this material into the set of most stable materials at this chemical composition, in eV/atom. Stability is tested against all potential chemical combinations that result in the material's composition. For example, a Co2O3 structure would be tested for decomposition against other Co2O3 structures, against Co and O2 mixtures, and against CoO and O2 mixtures.

Density
3.80 g/cm3

The calculated bulk crystalline density, typically underestimated due calculated cell volumes overestimated on average by 3% (+/- 6%)

Decomposes To
Stable
Band Gap
3.040 eV

In general, band gaps computed with common exchange-correlation functionals such as the LDA and GGA are severely underestimated. Typically the disagreement is reported to be ~50% in the literature. Some internal testing by the Materials Project supports these statements; typically, we find that band gaps are underestimated by ~40%. We additionally find that several known insulators are predicted to be metallic.

Space Group

Hermann Mauguin
C2/m [12]
Hall
-C 2y
Point Group
2/m
Crystal System
monoclinic

Band Structure

Density of States
Warning! Semi-local DFT tends to severely underestimate bandgaps. Please see the wiki for more info.

sign indicates spin ↑ ↓

Vibrational Properties

Reference for phonon calculations and visualization: Visualize with phononwebsite

Phonon dispersion

Density of States
Warning! These calculations were performed using a PBEsol exchange correlation functional in the framework of DFPT using the Abinit code. Please see the wiki for more info.

X-Ray Diffraction

    Select radiation source:
  • Cu
  • Ag
  • Mo
  • Fe

Calculated powder diffraction pattern; note that peak spacings may be affected due to inaccuracies in calculated cell volume, which is typically overestimated on average by 3% (+/- 6%)

Substrates

Reference for minimal coincident interface area (MCIA) and elastic energy:
substrate orientation:
No elastic tensor calculated for this material, so elastic energies not avaialable. Sorting by MCIA instead.
substrate material substrate orientation film orientation MCIA† [Å2]
AlN (mp-661) <1 0 0> <0 1 1> 261.9
AlN (mp-661) <0 0 1> <1 1 0> 209.7
AlN (mp-661) <1 0 1> <0 1 0> 124.9
AlN (mp-661) <1 1 0> <1 1 -1> 211.0
AlN (mp-661) <1 1 1> <0 1 0> 249.9
BaF2 (mp-1029) <1 0 0> <1 0 1> 78.7
BaF2 (mp-1029) <1 1 0> <1 0 0> 168.4
GaAs (mp-2534) <1 0 0> <0 1 0> 312.3
GaAs (mp-2534) <1 1 0> <0 1 1> 327.3
GaN (mp-804) <0 0 1> <1 0 0> 126.3
GaN (mp-804) <1 0 1> <1 0 0> 168.4
GaN (mp-804) <1 1 1> <1 0 0> 336.7
SiO2 (mp-6930) <1 0 0> <0 1 0> 187.4
SiO2 (mp-6930) <1 0 1> <0 1 0> 281.1
SiO2 (mp-6930) <1 1 1> <1 0 0> 210.5
KCl (mp-23193) <1 0 0> <0 1 0> 124.9
KCl (mp-23193) <1 1 0> <1 0 1> 236.1
GaN (mp-804) <1 0 0> <0 0 1> 172.6
GaN (mp-804) <1 1 0> <0 1 1> 261.9
SiO2 (mp-6930) <0 0 1> <0 0 1> 172.6
SiO2 (mp-6930) <1 1 0> <1 0 -1> 189.0
DyScO3 (mp-31120) <0 1 1> <1 1 -1> 211.0
DyScO3 (mp-31120) <1 0 1> <1 0 0> 168.4
DyScO3 (mp-31120) <1 1 1> <1 0 0> 294.7
InAs (mp-20305) <1 1 0> <1 0 1> 157.4
ZnSe (mp-1190) <1 1 0> <0 1 1> 327.3
DyScO3 (mp-31120) <0 0 1> <1 0 1> 157.4
DyScO3 (mp-31120) <0 1 0> <0 1 0> 312.3
DyScO3 (mp-31120) <1 0 0> <0 1 1> 327.3
DyScO3 (mp-31120) <1 1 0> <1 0 1> 314.8
CdS (mp-672) <1 1 1> <0 1 0> 156.2
KTaO3 (mp-3614) <1 0 0> <0 1 0> 249.9
KTaO3 (mp-3614) <1 1 0> <0 1 0> 249.9
CdS (mp-672) <1 0 0> <1 1 0> 262.1
CdS (mp-672) <1 1 0> <1 0 -1> 252.1
LiF (mp-1138) <1 0 0> <0 1 0> 249.9
LiF (mp-1138) <1 1 0> <1 0 1> 236.1
Te2W (mp-22693) <0 0 1> <0 1 0> 218.6
YVO4 (mp-19133) <0 0 1> <1 0 -1> 315.1
YVO4 (mp-19133) <1 0 1> <0 1 0> 281.1
TePb (mp-19717) <1 0 0> <0 1 0> 124.9
YVO4 (mp-19133) <1 0 0> <1 0 -1> 189.0
YVO4 (mp-19133) <1 1 0> <1 1 0> 262.1
TePb (mp-19717) <1 1 0> <1 0 1> 236.1
Ag (mp-124) <1 1 0> <0 1 0> 343.6
Te2Mo (mp-602) <0 0 1> <1 1 0> 209.7
Te2Mo (mp-602) <1 0 0> <0 1 0> 343.6
Te2Mo (mp-602) <1 0 1> <1 1 1> 169.3
Ag (mp-124) <1 0 0> <0 1 0> 249.9
GaSe (mp-1943) <0 0 1> <0 1 1> 261.9
Up to 50 entries displayed.
†minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Visualize with ELATE
Stiffness Tensor Cij (GPa)
161 75 69 0 23 0
75 158 86 0 10 0
69 86 185 0 7 0
0 0 0 72 0 5
23 10 7 0 43 0
0 0 0 5 0 44
Compliance Tensor Sij (10-12Pa-1)
8.9 -3 -1.8 0 -3.7 0
-3 9.6 -3.3 0 -0.2 0
-1.8 -3.3 7.6 0 0.5 0
0 0 0 13.9 0 -1.7
-3.7 -0.2 0.5 0 25.2 0
0 0 0 -1.7 0 23.2
Shear Modulus GV
50 GPa
Bulk Modulus KV
107 GPa
Shear Modulus GR
46 GPa
Bulk Modulus KR
102 GPa
Shear Modulus GVRH
48 GPa
Bulk Modulus KVRH
104 GPa
Elastic Anisotropy
0.46
Poisson's Ratio
0.30

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
Co2As2O7 (mp-561871) 0.1286 0.026 3
Zn2As2O7 (mp-754262) 0.2211 0.027 3
Co2As2O7 (mp-505067) 0.1565 0.026 3
Mn2As2O7 (mp-19290) 0.2192 0.000 3
In2Ge2O7 (mp-5280) 0.1575 0.000 3
LiVP2O7 (mp-766613) 0.5624 0.053 4
LiCrP2O7 (mp-777633) 0.5562 0.055 4
LiFeP2O7 (mp-687079) 0.5672 0.044 4
Up to 5 similar elemental, binary, ternary, quaternary, etc. structures displayed (dissimilarity threshold 0.75). Ehull: energy above hull per atom [eV].

Calculation Summary

Elasticity

Methodology

Structure Optimization

Run Type
GGA
Energy Cutoff
520 eV
# of K-points
None
U Values
--
Pseudopotentials
VASP PAW: O Mg_pv As
Final Energy/Atom
-6.1298 eV
Corrected Energy
-72.3441 eV
-72.3441 eV = -67.4280 eV (uncorrected energy) - 4.9160 eV (MP Anion Correction)

Detailed input parameters and outputs for all calculations

Show JSON History Show BibTex Citation Download BibTex Citation
ICSD IDs
  • 16885
  • 23548
Submitted by
User remarks:
  • High pressure experimental phase
  • Magnesium diarsenate

Displaying lattice parameters for primitive cell; note that calculated cell volumes are typically overestimated on average by 3% (+/- 6%). Note the primitive cell may appear less symmetric than the conventional cell representation (see "Structure Type" selector below the 3d structure)