Table 1 The recommended values of constants (A, B, C) and functions of (f(P), f(e-)) in the pressure-modulated electronegativity’s formula for each element block in the periodic table

From: Electron transfer rules of minerals under pressure informed by machine learning

Blocks

A

f(P)

B

f(e-)

C

s-block metals

7.112

–0.043P

1.020

ne

–8.851

p-block metals

7.171

–0.019P

0.980

ne

–8.272

nonmetals

5.146

–0.019P

\({1.080}^{{n}_{e}}\)

ne

–5.682ln(n)

d-block metals

5.857

–0.037P

0.376

ne

–6.671

f-block metals

6.693

–0.037P

–0.013

Z

–5.518

Noble gas

6.359

–0.025P

–0.704

n

0.383

ds-block metals

–1.628

0.265ln(P)

0.451

n

–0.674

  1. A, B, C, ne, Z, and n in italic are all scalar variables.
  2. The symbol ne, Z, and n represents the number of valence electrons, atomic number and the principal quantum number, respectively.