Components kept separate, in the value's unit (literature SCHEMA.md, UNCERTAINTY_CALIBRATION.md): effective = max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter). The method floor is the robust between-study scatter of the method class in ORCHID (calibrated) or a documented prior; printed values and printed uncertainties are unchanged.
Uncertainty budget of the literature values of Cd58Gd13
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
-31.92
kJ/mol-atom
0.005
3.9 (model_calculated, calibrated)
3.9
Sources
Hassan Azza, Mustapha Ait Boukideur, Khadija Achgar, Mohamed Idbenali, Najim Selhaoui, Thermodynamic Description of the Gadolinium-Cadmium Phase Diagram, J. Phase Equilib. Diffus. 45, 714-722 (2024). doi:10.1007/s11669-024-01127-6