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Table 3 Results from target transform testing of XANES reference spectra based on the seven principal components obtained by PCA (Table 2)

From: Origin of high Zn contents in Jurassic limestone of the Jura mountain range and the Burgundy: evidence from Zn speciation and distribution

References SPOILa NSSR (%)
nat. Zn-montmorillonite 1.2 0.02
Willemite 1.5 0.06
Zn-goethite 2.2 0.01
Franklinite 2.3 0.17
Zn0.6Mg0.4-kerolite 2.3 0.06
Sphalerite 2.4 0.02
Zn0.34Mg0.6-kerolite 2.7 0.08
Zn-ferrihydrite 2.9 0.12
Zn0.8Mg0.2-kerolite 3.0 0.07
Hydrozincite 3.0 0.03
Zn-calcite 3.1 0.03
Zn-hydroxide 3.4 0.04
Zn-kerolite 3.6 0.09
Wurtzite 3.9 0.05
Zn0.06Mg0.94-kerolite 3.9 0.10
Chalcophanite 3.9 0.13
Hemimorphite 4.6 0.15
syn. Zn-kaolinite 5.1 0.24
Gahnite 5.2 0.63
nat. Zn-kaolinite 5.4 0.18
Smithsonite 6.4 0.32
ZnSO4 7.5 0.26
ZnO 7.6 0.40
  1. Spectra are arranged by increasing SPOIL value. All listed references except ZnSO4 and ZnO were included in the LCF analysis
  2. a SPOIL 0–1.5 excellent; 1.5–3 good, 3–4.5 fair, 4.5–6 acceptable, >6 unacceptable reference (Malinowski 1978)