Figure 5

Periodic table outlining chemical analyses of HP12. Those elements shown in red were analyzed using X-ray fluorescence (XRF) and/or inductively-coupled plasma optical emission spectrometry (ICP-OES). Elements in red with parentheses (i.e., (B)) are indicative of elements near or below instrument detection limits. Elements shaded in: 1) yellow represents those that are completely soluble elements (based on deionized water and 1 M HCl extracts using ICP-OES); 2) orange represents completely soluble elements (based on 1 M HCl extract and XRF); 3) green represents those with good agreement between ICP-OES (1 M HNO3 extracts) and XRF; and 4) blue represents those found to be only partially soluble based on ICP-OES extractions.