OREAS 455

OREAS 455 was prepared predominantly from nontronitic nickel-cobalt laterite ore sourced from Bulong, Western Australia, with lesser additions of other lateritic nickel materials from Murrin Murrin 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.%) 1.65 0.016 1.64 1.67 Borate Fusion XRF
Co, Cobalt (ppm) 851 14 836 866 Borate Fusion XRF
Sc, Scandium (ppm) 27.2 2.31 25.1 29.2 Borate / Peroxide Fusion ICP
Al2O3, Aluminium(III) oxide (wt.%) 8.24 0.071 8.16 8.32 Borate Fusion XRF
CaO, Calcium oxide (wt.%) 0.232 0.011 0.223 0.241 Borate Fusion XRF
Cr2O3, Chromium(III) oxide (wt.%) 1.08 0.014 1.07 1.09 Borate Fusion XRF
Cu, Copper (ppm) 66 11 51 82 Borate Fusion XRF
Fe2O3, Iron(III) oxide (wt.%) 36.05 0.366 35.71 36.39 Borate Fusion XRF
K2O, Potassium oxide (wt.%) 0.134 0.011 0.124 0.144 Borate Fusion XRF
MgO, Magnesium oxide (wt.%) 3.97 0.058 3.93 4.01 Borate Fusion XRF
MnO, Manganese oxide (wt.%) 0.283 0.006 0.278 0.288 Borate Fusion XRF
Na2O, Sodium oxide (wt.%) 0.676 0.054 0.645 0.706 Borate Fusion XRF
P2O5, Phosphorus(V) oxide (wt.%) 0.010 0.001 0.009 0.011 Borate Fusion XRF
Pb, Lead (ppm) < 50 IND IND IND Borate Fusion XRF
SiO2, Silicon dioxide (wt.%) 36.83 0.316 36.51 37.15 Borate Fusion XRF
SO3, Sulphur trioxide (wt.%) 0.220 0.019 0.202 0.238 Borate Fusion XRF
TiO2, Titanium dioxide (wt.%) 0.303 0.019 0.289 0.318 Borate Fusion XRF
V2O5, Vanadium(V) oxide (ppm) 190 17 150 230 Borate Fusion XRF
Zn, Zinc (ppm) 167 12 157 177 Borate Fusion XRF
LOI1000, Loss on ignition @1000 °C (wt.%) 9.70 0.434 9.45 9.95 Thermogravimetry
Al, Aluminium (wt.%) 4.16 0.136 4.03 4.30 Borate / Peroxide Fusion ICP
As, Arsenic (ppm) < 100 IND IND IND Borate / Peroxide Fusion ICP
B, Boron (ppm) 56 8 48 64 Borate / Peroxide Fusion ICP
Ba, Barium (ppm) 105 6 99 112 Borate / Peroxide Fusion ICP
Be, Beryllium (ppm) < 1.00 IND IND IND Borate / Peroxide Fusion ICP
Ca, Calcium (wt.%) 0.155 0.029 0.129 0.180 Borate / Peroxide Fusion ICP
Cd, Cadmium (ppm) < 10.0 IND IND IND Borate / Peroxide Fusion ICP
Ce, Cerium (ppm) 24.5 1.93 23.1 25.9 Borate / Peroxide Fusion ICP
Co, Cobalt (ppm) 824 31 791 857 Borate / Peroxide Fusion ICP
Cr, Chromium (wt.%) 0.708 0.038 0.679 0.737 Borate / Peroxide Fusion ICP
Cs, Caesium (ppm) 0.43 0.07 0.32 0.55 Borate / Peroxide Fusion ICP
Cu, Copper (ppm) 58 7 52 65 Borate / Peroxide Fusion ICP
Dy, Dysprosium (ppm) 1.02 0.10 0.92 1.11 Borate / Peroxide Fusion ICP
Er, Erbium (ppm) 0.60 0.07 0.48 0.73 Borate / Peroxide Fusion ICP
Eu, Europium (ppm) 0.31 0.04 0.27 0.36 Borate / Peroxide Fusion ICP
Fe, Iron (wt.%) 24.10 0.864 23.38 24.81 Borate / Peroxide Fusion ICP
Ga, Gallium (ppm) 7.42 1.28 6.38 8.47 Borate / Peroxide Fusion ICP
Gd, Gadolinium (ppm) 0.97 0.11 0.85 1.09 Borate / Peroxide Fusion ICP
Ho, Holmium (ppm) 0.20 0.03 0.17 0.22 Borate / Peroxide Fusion ICP
In, Indium (ppm) < 0.10 IND IND IND Borate / Peroxide Fusion ICP
K, Potassium (wt.%) 0.107 0.020 0.089 0.126 Borate / Peroxide Fusion ICP
La, Lanthanum (ppm) 3.08 0.307 2.84 3.31 Borate / Peroxide Fusion ICP
Li, Lithium (ppm) 7.69 1.18 6.00 9.39 Borate / Peroxide Fusion ICP
Lu, Lutetium (ppm) 0.10 0.01 0.08 0.12 Borate / Peroxide Fusion ICP
Mg, Magnesium (wt.%) 2.28 0.082 2.22 2.35 Borate / Peroxide Fusion ICP
Mn, Manganese (wt.%) 0.210 0.008 0.203 0.218 Borate / Peroxide Fusion ICP
Mo, Molybdenum (ppm) 20.0 2.9 18.0 22.0 Borate / Peroxide Fusion ICP
Nd, Neodymium (ppm) 3.93 0.48 3.48 4.38 Borate / Peroxide Fusion ICP
Ni, Nickel (wt.%) 1.58 0.063 1.54 1.62 Borate / Peroxide Fusion ICP
Pb, Lead (ppm) < 100 IND IND IND Borate / Peroxide Fusion ICP
Pr, Praseodymium (ppm) 0.97 0.052 0.89 1.04 Borate / Peroxide Fusion ICP
Rb, Rubidium (ppm) 3.84 0.66 3.17 4.51 Borate / Peroxide Fusion ICP
Re, Rhenium (ppm) < 0.10 IND IND IND Borate / Peroxide Fusion ICP
S, Sulphur (wt.%) 0.090 0.009 0.078 0.101 Borate / Peroxide Fusion ICP
Sb, Antimony (ppm) 0.90 0.20 0.68 1.12 Borate / Peroxide Fusion ICP
Se, Selenium (ppm) < 20.0 IND IND IND Borate / Peroxide Fusion ICP
Si, Silicon (wt.%) 16.80 0.484 16.34 17.27 Borate / Peroxide Fusion ICP
Sm, Samarium (ppm) 0.98 0.095 0.85 1.12 Borate / Peroxide Fusion ICP
Sr, Strontium (ppm) 14.4 2.6 11.9 17.0 Borate / Peroxide Fusion ICP
Tb, Terbium (ppm) 0.17 0.009 0.15 0.18 Borate / Peroxide Fusion ICP
Te, Tellurium (ppm) < 1.00 IND IND IND Borate / Peroxide Fusion ICP
Th, Thorium (ppm) 0.81 0.061 0.74 0.87 Borate / Peroxide Fusion ICP
Ti, Titanium (wt.%) 0.173 0.007 0.165 0.180 Borate / Peroxide Fusion ICP
Tm, Thulium (ppm) 0.088 0.017 0.070 0.107 Borate / Peroxide Fusion ICP
U, Uranium (ppm) 0.53 0.06 0.48 0.58 Borate / Peroxide Fusion ICP
V, Vanadium (ppm) 104 7 99 108 Borate / Peroxide Fusion ICP
W, Tungsten (ppm) 4.57 0.65 3.57 5.57 Borate / Peroxide Fusion ICP
Y, Yttrium (ppm) 3.77 0.196 3.54 4.00 Borate / Peroxide Fusion ICP
Yb, Ytterbium (ppm) 0.71 0.055 0.64 0.78 Borate / Peroxide Fusion ICP
Zn, Zinc (ppm) 161 10 151 170 Borate / Peroxide Fusion ICP
Zr, Zirconium (ppm) 32.8 5.4 25.7 39.9 Borate / Peroxide Fusion ICP
C, Carbon (wt.%) 0.167 0.030 0.150 0.184 Infrared Combustion
S, Sulphur (wt.%) 0.085 0.017 0.073 0.096 Infrared Combustion
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