OREAS 453

OREAS 453 was prepared predominantly from nontronitic nickel-cobalt laterite ore sourced from Bulong, Western Australia, with lesser additions of nickel laterite materials from Murrin Murrin and Ravensthorpe, together with weathered basaltic material, to achieve the target nickel, cobalt and matrix composition.

Twenty-eight commercial analytical laboratories participated in the program to certify the elements reported below using the following methods:

  • Borate Fusion XRF- Majors and some traces, including Loss on Ignition (LOI) at 1000 °C
  • Lithium borate or sodium peroxide fusion with full suite elemental package by ICP-OES and/or MS finish
  • Carbon and sulphur by infrared combustion furnace/CS analyser

Homogeneity was evaluated using 12 subsamples analysed by lithium borate fusion with X-ray fluorescence finish. ANOVA was applied to duplicates from six test units to compare within- and between-unit variances, providing a statistical measure of batch homogeneity.

Analyte Certified Value 1SD Expanded Uncertainty Low Expanded Uncertainty High Method
Ni, Nickel (wt.%) 1.40 0.018 1.39 1.42 Borate Fusion XRF
Co, Cobalt (ppm) 654 14 642 667 Borate Fusion XRF
Sc, Scandium (ppm) 24.6 2.45 22.7 26.6 Borate / Peroxide Fusion ICP
Al2O3, Aluminium(III) oxide (wt.%) 9.18 0.127 9.10 9.26 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 1.25 0.022 1.24 1.27 Borate Fusion XRF
Cr2O3, Chromium(III) oxide (wt.%) 0.798 0.011 0.787 0.810 Borate Fusion XRF
Cu, Copper (ppm) 112 19 97 127 Borate Fusion XRF
Fe2O3, Iron(III) oxide (wt.%) 29.51 0.287 29.31 29.70 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 0.235 0.012 0.225 0.245 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 4.92 0.068 4.88 4.96 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 0.262 0.006 0.258 0.267 Borate Fusion XRF
Na2O, Sodium oxide (wt.%) 0.951 0.081 0.907 0.996 Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.048 0.003 0.045 0.051 Borate Fusion XRF
Pb, Lead (ppm) < 50 IND IND IND Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 41.53 0.270 41.32 41.74 Borate Fusion XRF
SO3, Sulphur trioxide (wt.%) 0.628 0.031 0.601 0.655 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.530 0.014 0.517 0.543 Borate Fusion XRF
V2O5, Vanadium(V) oxide (ppm) 191 33 153 229 Borate Fusion XRF
Zn, Zinc (ppm) 145 10 135 155 Borate Fusion XRF
LOI1000, Loss on ignition @1000 °C (wt.%) 8.54 0.388 8.29 8.79 Thermogravimetry
Al, Aluminium (wt.%) 4.68 0.142 4.53 4.84 Borate / Peroxide Fusion ICP
B, Boron (ppm) 61 8 50 72 Borate / Peroxide Fusion ICP
Ba, Barium (ppm) 129 8 122 136 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) 0.56 0.25 0.38 0.73 Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 0.871 0.064 0.821 0.921 Borate / Peroxide Fusion ICP
Cd, Cadmium (ppm) < 10.0 IND IND IND Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 28.1 2.50 26.5 29.8 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 643 22 621 665 Borate / Peroxide Fusion ICP
Cr, Chromium (wt.%) 0.533 0.025 0.513 0.553 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 0.55 0.07 0.47 0.63 Borate / Peroxide Fusion ICP
Cu, Copper (ppm) 102 8 94 110 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 1.72 0.19 1.57 1.86 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 0.96 0.11 0.81 1.11 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 0.52 0.045 0.47 0.57 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 19.89 0.773 19.26 20.52 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 9.43 1.11 8.36 10.49 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 1.77 0.173 1.59 1.96 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 0.34 0.030 0.30 0.37 Borate / Peroxide Fusion ICP
In, Indium (ppm) < 0.10 IND IND IND Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 0.201 0.020 0.169 0.234 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 7.85 0.437 7.38 8.32 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 9.13 0.754 7.59 10.66 Borate / Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.13 0.02 0.10 0.15 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 2.84 0.091 2.75 2.93 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.194 0.009 0.187 0.202 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 15.6 1.17 14.2 17.1 Borate / Peroxide Fusion ICP
Nb, Niobium (ppm) 3.75 0.164 3.40 4.11 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 7.81 0.453 7.31 8.31 Borate / Peroxide Fusion ICP
Ni, Nickel (wt.%) 1.35 0.043 1.30 1.39 Borate / Peroxide Fusion ICP
P, Phosphorus (wt.%) 0.020 0.002 0.019 0.021 Borate / Peroxide Fusion ICP
Pb, Lead (ppm) < 100 IND IND IND Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 1.95 0.120 1.81 2.10 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 7.29 1.02 6.48 8.10 Borate / Peroxide Fusion ICP
Re, Rhenium (ppm) < 0.10 IND IND IND Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 0.249 0.010 0.237 0.262 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 3.28 0.42 2.74 3.81 Borate / Peroxide Fusion ICP
Se, Selenium (ppm) < 20.0 IND IND IND Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 19.25 0.507 18.66 19.83 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 1.83 0.140 1.69 1.97 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 61 4.0 57 64 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 0.29 0.016 0.26 0.31 Borate / Peroxide Fusion ICP
Te, Tellurium (ppm) < 1.00 IND IND IND Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 2.73 0.156 2.57 2.89 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.306 0.013 0.293 0.318 Borate / Peroxide Fusion ICP
Tm, Thulium (ppm) 0.14 0.03 0.11 0.16 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 0.78 0.12 0.66 0.90 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 106 6 100 112 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 4.13 0.62 3.36 4.91 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 7.27 0.527 6.75 7.79 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 0.99 0.061 0.91 1.07 Borate / Peroxide Fusion ICP
Zn, Zinc (ppm) 141 11 132 150 Borate / Peroxide Fusion ICP
Zr, Zirconium (ppm) 58 7 49 67 Borate / Peroxide Fusion ICP
C, Carbon (wt.%) 0.192 0.033 0.173 0.210 Infrared Combustion
S, Sulphur (wt.%) 0.232 0.020 0.217 0.246 Infrared Combustion
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