material

Mg(BeAs)2
ID:

mp-865185
DOI:

10.17188/1310483

Tags: Magnesium beryllium arsenide (1/2/2)

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
NM
Formation Energy / Atom
-0.322 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
3.96 g/cm3

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

Decomposes To
Stable
Band Gap
0.611 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
P3m1 [164]
Hall
-P 3 2"
Point Group
3m
Crystal System
trigonal

Electronic Structure

Topological data for ICSD ID 609872 from Topological Materials Database
Topological Classification
trivial*
Subclassification
LCEBR†
* trivial insulator or metal
† Linear Combination of Elementary Band Representations

Band Structure and Density of States

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

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:
substrate material substrate orientation film orientation elastic energy [meV] MCIA† [Å2]
ZnO (mp-2133) <0 0 1> <0 0 1> 0.000 37.4
SiO2 (mp-6930) <0 0 1> <0 0 1> 0.000 87.4
TiO2 (mp-2657) <1 1 1> <0 0 1> 0.001 87.4
WS2 (mp-224) <1 1 1> <0 0 1> 0.007 237.2
Cu (mp-30) <1 1 0> <1 1 1> 0.009 221.5
CdSe (mp-2691) <1 1 1> <0 0 1> 0.010 199.7
ZnTe (mp-2176) <1 1 1> <0 0 1> 0.012 199.7
TiO2 (mp-390) <1 0 0> <1 0 0> 0.014 73.6
InAs (mp-20305) <1 1 1> <0 0 1> 0.017 199.7
GaSb (mp-1156) <1 1 1> <0 0 1> 0.021 199.7
LiGaO2 (mp-5854) <0 1 0> <1 0 0> 0.033 98.2
LiF (mp-1138) <1 1 1> <0 0 1> 0.036 87.4
PbSe (mp-2201) <1 1 1> <0 0 1> 0.040 199.7
C (mp-48) <1 0 0> <1 1 0> 0.051 212.5
GaSe (mp-1943) <0 0 1> <0 0 1> 0.065 12.5
DyScO3 (mp-31120) <1 0 1> <1 0 0> 0.071 220.9
ZrO2 (mp-2858) <0 1 1> <1 1 1> 0.074 310.1
LaF3 (mp-905) <1 0 0> <1 1 0> 0.075 212.5
CaCO3 (mp-3953) <0 0 1> <0 0 1> 0.075 87.4
SiO2 (mp-6930) <1 0 1> <1 0 0> 0.085 245.4
YAlO3 (mp-3792) <0 1 0> <1 0 0> 0.085 196.3
DyScO3 (mp-31120) <0 0 1> <1 0 1> 0.086 247.8
TiO2 (mp-390) <1 0 1> <1 0 0> 0.086 196.3
C (mp-66) <1 1 1> <0 0 1> 0.090 87.4
LiTaO3 (mp-3666) <0 0 1> <0 0 1> 0.093 162.3
Cu (mp-30) <1 0 0> <1 1 0> 0.094 170.0
Ge(Bi3O5)4 (mp-23352) <1 0 0> <1 1 0> 0.096 212.5
Al (mp-134) <1 0 0> <1 1 0> 0.097 212.5
NaCl (mp-22862) <1 0 0> <0 0 1> 0.098 262.1
Ge3(BiO3)4 (mp-23560) <1 1 1> <0 0 1> 0.099 199.7
C (mp-48) <0 0 1> <0 0 1> 0.108 37.4
BaTiO3 (mp-5986) <1 1 1> <1 0 0> 0.112 171.8
Ni (mp-23) <1 1 0> <1 0 0> 0.113 294.5
KTaO3 (mp-3614) <1 0 0> <1 1 0> 0.113 212.5
TbScO3 (mp-31119) <1 0 1> <1 0 0> 0.121 220.9
Mg (mp-153) <0 0 1> <0 0 1> 0.130 112.3
GaAs (mp-2534) <1 1 0> <0 0 1> 0.133 187.2
SiO2 (mp-6930) <1 0 0> <1 0 0> 0.137 220.9
ZnSe (mp-1190) <1 1 0> <0 0 1> 0.138 187.2
Ge (mp-32) <1 1 0> <0 0 1> 0.140 187.2
AlN (mp-661) <1 1 0> <1 0 0> 0.144 220.9
AlN (mp-661) <1 0 1> <1 0 0> 0.146 196.3
NdGaO3 (mp-3196) <0 0 1> <1 0 1> 0.154 247.8
LiAlO2 (mp-3427) <1 0 1> <1 0 0> 0.166 171.8
LiF (mp-1138) <1 1 0> <0 0 1> 0.166 187.2
SiC (mp-11714) <1 1 1> <0 0 1> 0.169 274.6
TbScO3 (mp-31119) <0 0 1> <1 0 1> 0.173 247.8
MgO (mp-1265) <1 1 0> <1 0 1> 0.181 302.8
GaTe (mp-542812) <1 0 0> <0 0 1> 0.183 312.0
InP (mp-20351) <1 0 0> <1 1 1> 0.184 177.2
Up to 50 entries displayed.
†minimal coincident interface area.

Elasticity

Reference for tensor and properties:
Visualize with ELATE
Stiffness Tensor Cij (GPa)
165 39 31 -2 0 0
39 165 31 2 0 0
31 31 152 0 0 0
-2 2 0 28 0 0
0 0 0 0 28 -2
0 0 0 0 -2 63
Compliance Tensor Sij (10-12Pa-1)
6.6 -1.4 -1.1 0.7 0 0
-1.4 6.6 -1.1 -0.7 0 0
-1.1 -1.1 7 0 0 0
0.7 -0.7 0 36.2 0 0
0 0 0 0 36.2 1.4
0 0 0 0 1.4 16
Shear Modulus GV
49 GPa
Bulk Modulus KV
76 GPa
Shear Modulus GR
42 GPa
Bulk Modulus KR
76 GPa
Shear Modulus GVRH
45 GPa
Bulk Modulus KVRH
76 GPa
Elastic Anisotropy
0.89
Poisson's Ratio
0.25

Dielectric Properties

Reference for tensor and properties: Methodology
Dielectric Tensor εij∞ (electronic contribution)
10.71 -0.00 0.00
-0.00 10.71 0.00
0.00 0.00 10.99
Dielectric Tensor εij (total)
19.00 -0.00 0.00
-0.00 19.00 0.00
0.00 0.00 21.22
Polycrystalline dielectric constant εpoly∞
(electronic contribution)
10.81
Polycrystalline dielectric constant εpoly
(total)
19.74
Refractive Index n
3.29
Potentially ferroelectric?
Unknown

Similar Structures beta feature

Explanation of dissimilarity measure: Documentation.
material dissimilarity Ehull # of elements
Ba(MgSb)2 (mp-9567) 0.0947 0.000 3
Ba(MgBi)2 (mp-29209) 0.0901 0.000 3
Sr(MgAs)2 (mp-863260) 0.0808 0.000 3
Mg(BeP)2 (mp-1017628) 0.0832 0.000 3
Ba(CdAs)2 (mp-8281) 0.1031 0.000 3
Li8Mn(O2F)2 (mp-780086) 0.7445 0.071 4
Li6Mn(FeO3)2 (mp-764386) 0.3455 0.040 4
LiCaGaN2 (mp-570948) 0.7342 0.000 4
LiFeCuS2 (mp-755288) 0.2940 0.124 4
Pu2O3 (mp-908430) 0.3505 0.091 2
Bi2O3 (mp-1017552) 0.2826 0.071 2
Pu2O3 (mp-21423) 0.3185 0.091 2
Ce2O3 (mp-2721) 0.3373 0.044 2
Ce2O3 (mp-906096) 0.3489 0.044 2
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
700 eV
# of K-points
None
U Values
--
Pseudopotentials
VASP PAW: Mg_pv Be_sv As
Final Energy/Atom
-4.0016 eV
Corrected Energy
-20.0079 eV
-20.0079 eV = -20.0079 eV (uncorrected energy)

Detailed input parameters and outputs for all calculations

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ICSD IDs
  • 609872
Submitted by
User remarks:
  • Magnesium beryllium arsenide (1/2/2)

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)