Table 2 Prototype structures calculated in the OQMD

From: The Open Quantum Materials Database (OQMD): assessing the accuracy of DFT formation energies

Designation

Number of atoms

SG

Formula

Description

Example

Unary

 A1

1

Fm 3 ¯ m

A

FCC

Cu

 A2

1

Im 3 ¯ m

A

BCC

W

 A3

2

P63/mmc

A

HCP

Mg

 A3'

4

P63/mmc

A

Distorted HCP

α-La

 A4

2

Fd 3 ¯ m

A

Diamond

C

 A5

2

I41/amd

A

 

β-Sn

 A6

1

I4/mmm

A

 

In

 A7

2

R 3 ¯ m

A

 

α-As

 A8

3

P3121

A

 

γ-Se

 A9

4

P63/mmc

A

Graphite

C

 A10

1

R 3 ¯ m

A

Simple rhombohedral

α-Hg

 A11

4

Cmca

A

BCO

α-Ga

 A12

29

I 4 ¯ 3m

A

 

α-Mn

 A13

20

P4132

A

 

β-Mn

 A15

8

Pm 3 ¯ m

A

W3O

β-W

 A17

4

Cmca

A

Black phosphorus

P

 A20

2

Cmcm

A

 

α-U

 Aa

1

I4/mmm

A

BCT

α-Pa

 Ah

1

Pm 3 ¯ m

A

Simple cubic

α-Po

 C19

3

R 3 ¯ m

A

 

α-Sm

Binary

 B2

2

Pm 3 ¯ m

AB

BCC superstructure

CsCl

 D03

4

Fm 3 ¯ m

A3B

BCC superstructure

AlFe3

 L10

2

P4/mmm

AB

FCC superstructure along [100]

AuCu

 L11

2

R 3 ¯ m

AB

FCC superstructure along [111]

CuPt

 L12

4

Pm 3 ¯ m

A3B

FCC superstructure with maximised unlike bonds

Cu3Au

 Bh

2

P6m2

AB

HCP superstructure along [0001]

WC

 B19

4

Pmma

AB

HCP superstructure

AuCd

 D019

8

P63/mmc

A3B

HCP superstructure with maximised unlike bonds

Ni3Sn

 E21

5

Pm 3 ¯ m

ABO3

Perovskite

CaTiO3

 defect-E21

9

P4/mmm

A2B2O5

Defect-perovskite

 

 D51

10

R 3 ¯ c

A2B3

Corundum

Al2O3

 C4

6

P42/mnm

AB2

Rutile

TiO2

 B1

2

Fm 3 ¯ m

AB

Rocksalt

NaCl

 B3

2

F4 3 ¯ m

AB

Zincblende

ZnS

 B4

4

P63mc

AB

Wurtzite

ZnS

 D022

4

I4/mmm

A3B

FCC superstructure along [012]

Al3Ti

Ternary

 L21

4

Fm 3 ¯ m

A2BC

Heusler BCC superstructure

Cu2MnAl

  1. Abbreviation: OQMD, Open Quantum Materials Database.
  2. For each structure the number of atoms in the primitive cell, general formula, a simple description and an example compound are given.