Phonon

{
  "id": "MLC-T-CHM-008768",
  "term": "Phonon",
  "field": "Chemistry",
  "definition": "A quantum of vibrational energy in a crystal lattice, analogous to a photon as a quantum of electromagnetic radiation. Phonons describe the collective excitations of atoms or molecules in a solid, propagating as waves. Their energy is directly proportional to their frequency, with the proportionality constant being the Planck constant.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "Planck constant",
    "mode"
  ],
  "references": [
    "PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 382 (https://doi.org/10.1351/pac200779030293)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/phonon/"
}