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Swiss Journal of Geosciences
Fig. 6 | Swiss Journal of Geosciences

Fig. 6

From: Standardisation, calibration and correlation of the Kübler-index and the vitrinite/bituminite reflectance: an inter-laboratory and field related study

Fig. 6

Correlation between CIS standards used by L. Warr in Heidelberg (Table 2) to adapt the SW standard FWHM-values in ∆°2θ to Kübler-Index data measured in Basel. The plot was re-drawn from a plot of D. Schmidt. Due to the scattering and the broader FWHM values the traditional Kübler – Frey standards were used (Schmidt et al. 1997). Three to seven specimens were prepared from each SW standard. (n = 18, r = 0.98)

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