TS EN ISO 80000-12/A1

TS EN ISO 80000-12/A1 is an amendment to the part of the quantities-and-units series devoted to condensed matter physics. Standards in this family support consistent naming and use of physical quantities so measurements, calculations, and technical communication stay comparable across texts and disciplines. Condensed matter physics deals with the behaviour of solids, liquids, semiconductors, magnetic materials, and other many-body systems, where precise quantity definitions matter in both experimental work and theory.

Quantity and unit practice in condensed matter physics

Standards of this type generally establish a common language for the designation, notation, and SI-based use of physical quantities. In condensed matter contexts, terms such as energy, density, magnetization, electrical conductivity, heat capacity, and related derived quantities appear frequently in publications, teaching, and instrumentation documentation. Clear terminology helps reduce ambiguity when data are exchanged between laboratories, textbooks, software, and engineering references.

What an amendment document means here

The A1 designation shows that this is an amendment to the parent standard rather than a standalone subject standard. In general, amendments update, clarify, or correct the underlying text and terminology arrangement. For that reason, this record should be understood as a maintenance update to the base part, not as a separate full technical code on its own.

• Consistent naming of quantities used in condensed matter physics
• SI-aligned unit and symbol usage
• Shared technical language for solids, liquids, and related systems
• An amendment that updates or corrects the parent standard