TS 2908

TS 2908 is a standard devoted to the naming, symbols, definitions, and conversion factors of quantities and units used in solid state physics within the SI system of units. Documents of this kind help laboratories, educators, and technical publications use the same physical concepts in a consistent way, especially where measured quantities must be compared across different scales and contexts.

How solid state quantities and units are organised

Solid state physics deals with crystal structure, electrical conduction, magnetic behaviour, thermal properties, and energy bands. A clear system of quantities and units is essential for comparing experimental results and for writing technical data unambiguously. The SI framework keeps the relationship between base units and derived units explicit, which is useful when expressing concepts such as density, resistivity, magnetically related quantities, or energy density in a consistent notation.

What this standard covers

• Symbols for quantities used in solid state physics
• Definitions of those quantities
• SI-aligned unit designations
• Conversion factors between units
• Common notation principles for consistent technical use

The document is an equivalent publication to ISO 31-13:1992 and is now withdrawn. In practice, it serves as a historical reference rather than a current normative source, but it remains useful for understanding the terminology and unit relationships associated with solid state physics. It presents a structured vocabulary and unit mapping for the subject without changing the general principles of SI itself.