IAEA-C2 , Travertine


IAEA‑C2 Travertine was obtained from a fresh water carbonate (travertine) deposited on gravels of the lower terrace of the Molasse Basin in Bavaria, Germany, located approximately 50km north of Munich. The material was covered by five meters of glacial deposits. It was kindly supplied by the Institute of Hydrology of the GSF (Forschungszentrum für Umwelt und Gesundheit), Neuherberg, and homogenized by the IAEA. The ground material was mechanically ground and mixed. After adding water the suspension was thoroughly mixed again. After drying, the material was milled to powder.

The recommended value of this quality control material is the result of the statistical evaluation of an interlaboratory comparison [1,2].

Reference date for decay correction: 1991-01-01

Recommended value

14C activity
Estimated standard
error [pMC]
41.14 0.03

Information value 

Standard deviation
-8.25 0.31


  1. ROZANSKI, K., Consultants' group meeting on 14C reference materials for radiocarbon laboratories. February 18-20, 1991, Vienna, Austria. Internal Report, IAEA, Vienna (1991).

  2. ROZANSKI, K., STICHLER, W., GONFIANTINI, R., SCOTT, E. M., BEUKENS, R. P., KROMER, B., VAN DER PLICHT, J., The IAEA 14C Intercomparison exercise 1990, Radiocarbon, 34 3 (1992) 506-519.


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