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Table 3 Correlation matrix using Pearson’s method on results shown in Table 3

From: The many faces of Reigate Stone: an assessment of variability in historic masonry based on Medieval London’s principal freestone

  Quartz Opal CT Feldspar Calcite Clays Bulk density Open porosity Pulse velocity Capillary absorption Sorptivity Hysteresis
Quartz 1           
Opal CT − 0.34 1          
Feldspar − 0.21 − 0.49 1         
Calcite − 0.21 0.58 − 0.23 1        
Clays − 0.65 − 0.06 − 0.12 − 0.42 1       
Bulk density − 0.40 0.18 0.24 0.59 − 0.14 1      
Open porosity 0.17 − 0.19 − 0.12 − 0.65 0.35 − 0.57 1     
Pulse velocity − 0.46 0.48 0.05 0.75 − 0.16 0.55 − 0.72 1    
Capillary absorption 0.31 − 0.26 0.03 − 0.60 0.09 − 0.62 0.55 − 0.82 1   
Sorptivity − 0.45 0.17 − 0.02 0.02 0.43 − 0.24 0.24 0.26 − 0.24 1  
Hysteresis − 0.23 0.31 − 0.04 − 0.21 0.28 − 0.35 0.37 0.14 − 0.08 0.64 1
  1. Mineralogical correlations made using all 33 samples. Mineralogical-physical and physical correlations made using 26 samples for which this data was available. R greater than 0.4 (or less than − 0.4) marked in italic. R greater than 0.6 (or less than − 0.6) marked in bold-italic