Table 3 List of descriptors for the SiO2 polymorphs.

From: Data-driven approach for the prediction and interpretation of core-electron loss spectroscopy

Thirty-two descriptors for SiO2 polymorphous

Number of bonds (1.0–1.5, 2.0–2.5, 2.5–3.0, 3.0–3.5, 3.5–4.0, 4.0–4.5, 4.5–5.0, 5.0–5.5, 5.5–6.0 Å)

Shorter Si-O* bond length

Average Si-O* bond length

Si-O*-Si angle

Longer Si-O bond length

Shorter Si-O bond length

Average Si-O bond length

Volume of larger/smaller tetrahedron

Average O-O-O angle in larger/smaller tetrahedron

Average O-Si-O angle in larger/smaller tetrahedron

  1. O* indicates that the oxygen has a core hole.