A large database of salt mixtures found in the built environment and a charge balance calculations toolkit. Output of the PREDICT project predominantly including measurements of Belgian historic sites collected by KIK-IRPA Monuments Lab. Contents: Full integrated database and charge balance calculation sheet, including raw ion concentrations and balanced outputs (.xlsx) Sample integrated database (25 mixtures) and charge balance calculation sheet, including raw ion concentrations and balanced outputs (.xlsx) R scripts for charge balance calculations (.R) Full set of raw ion concentrations for the R scripts (.txt) Sample of 25 raw ion concentrations for the R scripts (.txt) Full set of balanced outputs from the R script (.txt) Sample of 25 balanced outputs from the R script (.txt)

This research was funded in whole by the Belgium Science Policy (Belspo) within the framework of BRAIN-be 2.0, Belgian Research Action through Interdisciplinary Networks: project B2/191/P1/PREDICT (Research action B2); joint PhD project PREDICT, Phase Transitions of Salts under Changing Climatic Conditions. A CC BY license is applied to the AAM arising from this submission, in accordance with the grant's open access conditions.