Quantum mechanics

Raman spectroscopy

Linguistics

Philosophy

Crystal (programming language)

Materials science

Stress (linguistics)

Operating system

Phonon

Vibration

Computer science

Strain (injury)

Tensor (intrinsic definition)

Physics

Mathematics

Optics

Normal mode

Internal medicine

Condensed matter physics

Geometry

Medicine

Programming language

Cauchy stress tensor

Symmetry (geometry)

Wavenumber

Mode (computer interface)

Zeitschrift für Kristallographie - Crystalline Materials

The concept of the phonon-mode Grüneisen tensor is reviewed as method to determine the elastic strains across crystals from the changes in the wavenumbers of Raman-active phonon modes relative to an unstrained crystal. The symmetry constraints on the phonon-mode Grüneisen tensor are discussed and the consequences for which combinations of strains can be determined by this method are stated. A computer program for Windows, stRAinMAN, has been written to calculate strains from changes in Raman (or other phonon) mode wavenumbers, and vice-versa. It can be downloaded for free from www.rossangel.net.

Stress, strain and Raman shifts