Table 1 The calculated elastic constants (\(\hbox {C}_{{ij}}\)) of the diamond-like \(P{\bar{4}}m2\) structure of \(\hbox {BC}_{{7}}\) by Voigt–Reuss–Hill (VRH) method (in GPa).

From: Route to high-\(T_{c}\) superconductivity of \(\hbox {BC}_{{7}}\) via strong bonding of boron–carbon compound at high pressure

\(\mathbf{BC} _{{7}}\)

P(GPa)

Elastic constants

B

G

\(\hbox {H}_{{v}}\)

\(\hbox {C}_{{11}}\)

\(\hbox {C}_{{12}}\)

\(\hbox {C}_{{13}}\)

\(\hbox {C}_{{16}}\)

\(\hbox {C}_{{33}}\)

\(\hbox {C}_{{44}}\)

\(\hbox {C}_{{66}}\)

\(P{\bar{4}}m2\)

250

2079

473

871

0

1839

900

388

1157

649

46

  1. The calculated bulk modulus (B), shear modulus (G), and Vicker’s hardness (\(\hbox {H}_{{v}}\)).
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