Table 2 Elastic constants Cij (GPa) and elastic moduli B, G, and E (GPa) of Mg–B compounds at 0 GPa along with the reported data.

From: Pressure effect of the mechanical, electronics and thermodynamic properties of Mg–B compounds A first-principles investigations

Phase

Species

C11

C22

C33

C12

C13

C23

C44

C55

C66

B

G

E

MgB2

Present

419.8

 

253.6

53.2

41.5

 

184.3

64.6

 

151.7

116.2

276.1

Cal29

438.0

 

254.3

61.0

41.0

 

185.1

71.3

 

157.0

116.9

277.6

MgB4

Present

231.4

289.6

493.5

22.8

162.9

41.3

96.8

108.6

173.5

158.3

112.4

272.7

MgB7

Present

536.5

530.6

500.3

60.8

42.1

45.1

194.3

221.3

248.7

205.8

225.9

496.2

Cal20

539

527.7

496.9

61.1

42.4

44.8

195.1

220.6

250.1

206.5

226.6

497.7

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