Specifications
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CRM State:
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Matrix:
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Mineralisation:
OREAS 464b
OREAS 464b is an ore grade, rare earth element (TREO + Y₂O₃ ~4.84%) certified reference material (CRM) prepared from a blend of rare earth element (REE)–bearing waste rock sourced from Lynas Corporation’s Mount Weld Central Lanthanide Deposit and barren siliclastic sedimentary rock sourced from Victoria, Australia. The Mount Weld deposit is a Proterozoic, carbonatite-hosted, deeply weathered monazite-rich REE deposit located ~35 km south of Laverton in Western Australia. The REE-bearing ores are predominantly comprised of secondary REE phosphates such as monazite and other alteration products formed through intense tropical weathering.
OREAS 464b belongs to a CRM suite covering 0.11 – 9.88% TREO + Y₂O₃, with method-specific certification for REEs, major elements, and trace elements using fusion with XRF, fusion with ICP-OES and/or ICP-MS, and 4-acid digestion with ICP-OES and/or ICP-MS.
Twenty-five commercial analytical laboratories participated in the program to certify the elements reported below:
- 4-acid (HNO3-HF-HClO4-HCl) digestion with full suite ICP-OES and ICP-MS elemental packages
- Sodium peroxide/borate fusion with full suite ICP-OES and ICP-MS elemental packages
- Lithium borate fusion whole rock analysis package with X-ray fluorescence
- Thermogravimetry: Loss on Ignition (LOI) at 1000 °C
Homogeneity was evaluated using 12 subsamples analysed by sodium peroxide fusion with ICP finish. ANOVA was applied to triplicates from four 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 |
|---|---|---|---|---|---|
| CeO2, Cerium(IV) oxide (wt.%) | 1.80 | 0.083 | 1.73 | 1.87 | Borate / Peroxide Fusion ICP |
| La2O3, Lanthanum(III) oxide (wt.%) | 1.29 | 0.056 | 1.24 | 1.34 | Borate / Peroxide Fusion ICP |
| Nd2O3, Neodymium(III) oxide (wt.%) | 1.09 | 0.066 | 1.04 | 1.14 | Borate / Peroxide Fusion ICP |
| Pr6O11, Praseodymium(III,IV) oxide (wt.%) | 0.287 | 0.011 | 0.274 | 0.300 | Borate / Peroxide Fusion ICP |
| Ag, Silver (ppm) | 3.31 | 0.62 | 2.82 | 3.80 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 4.08 | 0.187 | 3.93 | 4.24 | 4-Acid Digestion |
| Ba, Barium (wt.%) | 0.146 | 0.009 | 0.138 | 0.155 | 4-Acid Digestion |
| Be, Beryllium (ppm) | 14.2 | 2.4 | 12.7 | 15.6 | 4-Acid Digestion |
| Bi, Bismuth (ppm) | 3.51 | 0.184 | 3.32 | 3.71 | 4-Acid Digestion |
| Ca, Calcium (wt.%) | 0.667 | 0.076 | 0.620 | 0.714 | 4-Acid Digestion |
| Cd, Cadmium (ppm) | 0.51 | 0.14 | 0.42 | 0.61 | 4-Acid Digestion |
| Ce, Cerium (wt.%) | 1.42 | 0.140 | 1.31 | 1.52 | 4-Acid Digestion |
| Co, Cobalt (ppm) | 15.6 | 0.88 | 14.8 | 16.5 | 4-Acid Digestion |
| Cr, Chromium (ppm) | 231 | 29 | 213 | 248 | 4-Acid Digestion |
| Cu, Copper (ppm) | 82 | 6.0 | 78 | 87 | 4-Acid Digestion |
| Dy, Dysprosium (ppm) | 148 | 17 | 133 | 162 | 4-Acid Digestion |
| Er, Erbium (ppm) | 31.6 | 3.4 | 28.4 | 34.8 | 4-Acid Digestion |
| Eu, Europium (ppm) | 281 | 38 | 251 | 312 | 4-Acid Digestion |
| Fe, Iron (wt.%) | 32.48 | 1.472 | 31.54 | 33.42 | 4-Acid Digestion |
| Gd, Gadolinium (ppm) | 582 | 101 | 495 | 668 | 4-Acid Digestion |
| Ho, Holmium (ppm) | 17.3 | 1.8 | 15.6 | 19.0 | 4-Acid Digestion |
| In, Indium (ppm) | 1.74 | 0.105 | 1.65 | 1.84 | 4-Acid Digestion |
| K, Potassium (wt.%) | 0.072 | 0.011 | 0.063 | 0.081 | 4-Acid Digestion |
| La, Lanthanum (wt.%) | 0.835 | 0.263 | 0.684 | 0.986 | 4-Acid Digestion |
| Li, Lithium (ppm) | 7.33 | 0.504 | 6.94 | 7.71 | 4-Acid Digestion |
| Mg, Magnesium (wt.%) | 0.666 | 0.083 | 0.615 | 0.716 | 4-Acid Digestion |
| Mn, Manganese (wt.%) | 0.242 | 0.024 | 0.225 | 0.258 | 4-Acid Digestion |
| Mo, Molybdenum (ppm) | 69 | 5.5 | 65 | 73 | 4-Acid Digestion |
| Na, Sodium (wt.%) | 0.119 | 0.012 | 0.110 | 0.128 | 4-Acid Digestion |
| Nb, Niobium (wt.%) | 0.183 | 0.023 | 0.167 | 0.198 | 4-Acid Digestion |
| Nd, Neodymium (wt.%) | 0.888 | 0.125 | 0.795 | 0.981 | 4-Acid Digestion |
| Ni, Nickel (ppm) | 65 | 4.5 | 60 | 69 | 4-Acid Digestion |
| P, Phosphorus (wt.%) | 1.10 | 0.22 | 0.98 | 1.22 | 4-Acid Digestion |
| Pb, Lead (ppm) | 175 | 28 | 159 | 190 | 4-Acid Digestion |
| Pr, Praseodymium (wt.%) | 0.238 | 0.011 | 0.219 | 0.257 | 4-Acid Digestion |
| Rb, Rubidium (ppm) | 3.87 | 0.44 | 3.51 | 4.22 | 4-Acid Digestion |
| S, Sulphur (wt.%) | 0.099 | 0.007 | 0.090 | 0.109 | 4-Acid Digestion |
| Sb, Antimony (ppm) | 1.69 | 0.124 | 1.53 | 1.85 | 4-Acid Digestion |
| Sc, Scandium (ppm) | 101 | 22 | 89 | 113 | 4-Acid Digestion |
| Sm, Samarium (wt.%) | 0.137 | 0.010 | 0.126 | 0.148 | 4-Acid Digestion |
| Sn, Tin (ppm) | 33.9 | 2.10 | 32.4 | 35.4 | 4-Acid Digestion |
| Sr, Strontium (wt.%) | 0.163 | 0.007 | 0.155 | 0.171 | 4-Acid Digestion |
| Ta, Tantalum (ppm) | 22.1 | 1.50 | 20.9 | 23.3 | 4-Acid Digestion |
| Tb, Terbium (ppm) | 49.2 | 8.5 | 42.3 | 56.1 | 4-Acid Digestion |
| Te, Tellurium (ppm) | 0.32 | 0.05 | 0.27 | 0.37 | 4-Acid Digestion |
| Ti, Titanium (wt.%) | 1.43 | 0.16 | 1.32 | 1.53 | 4-Acid Digestion |
| Tl, Thallium (ppm) | 0.13 | 0.013 | 0.12 | 0.15 | 4-Acid Digestion |
| Tm, Thulium (ppm) | 2.84 | 0.29 | 2.56 | 3.11 | 4-Acid Digestion |
| U, Uranium (ppm) | 15.5 | 0.91 | 14.7 | 16.2 | 4-Acid Digestion |
| V, Vanadium (ppm) | 191 | 17 | 181 | 201 | 4-Acid Digestion |
| W, Tungsten (ppm) | 2.40 | 0.218 | 2.19 | 2.61 | 4-Acid Digestion |
| Y, Yttrium (ppm) | 304 | 128 | 237 | 371 | 4-Acid Digestion |
| Yb, Ytterbium (ppm) | 13.7 | 3.6 | 11.1 | 16.3 | 4-Acid Digestion |
| Zn, Zinc (wt.%) | 0.101 | 0.010 | 0.095 | 0.107 | 4-Acid Digestion |
| Al, Aluminium (wt.%) | 4.34 | 0.095 | 4.24 | 4.45 | Borate / Peroxide Fusion ICP |
| Al2O3, Aluminium(III) oxide (wt.%) | 8.21 | 0.179 | 8.02 | 8.40 | Borate / Peroxide Fusion ICP |
| Ba, Barium (wt.%) | 0.159 | 0.007 | 0.151 | 0.167 | Borate / Peroxide Fusion ICP |
| BaO, Barium oxide (wt.%) | 0.177 | 0.007 | 0.168 | 0.186 | Borate / Peroxide Fusion ICP |
| Be, Beryllium (ppm) | 15.3 | 1.40 | 13.7 | 16.8 | Borate / Peroxide Fusion ICP |
| Bi, Bismuth (ppm) | 3.64 | 0.343 | 2.73 | 4.55 | Borate / Peroxide Fusion ICP |
| Ca, Calcium (wt.%) | 0.725 | 0.025 | 0.685 | 0.766 | Borate / Peroxide Fusion ICP |
| CaO, Calcium oxide (wt.%) | 1.01 | 0.035 | 0.96 | 1.07 | Borate / Peroxide Fusion ICP |
| Cd, Cadmium (ppm) | < 10.0 | IND | IND | IND | Borate / Peroxide Fusion ICP |
| Ce, Cerium (wt.%) | 1.46 | 0.067 | 1.41 | 1.52 | Borate / Peroxide Fusion ICP |
| Co, Cobalt (ppm) | 16.4 | 1.08 | 15.1 | 17.7 | Borate / Peroxide Fusion ICP |
| Cr, Chromium (ppm) | 263 | 19 | 242 | 284 | Borate / Peroxide Fusion ICP |
| Cr2O3, Chromium(III) oxide (ppm) | 384 | 28 | 353 | 415 | Borate / Peroxide Fusion ICP |
| Cu, Copper (ppm) | 95 | 11 | 78 | 112 | Borate / Peroxide Fusion ICP |
| Dy, Dysprosium (ppm) | 158 | 6 | 152 | 163 | Borate / Peroxide Fusion ICP |
| Dy2O3, Dysprosium(III) oxide (ppm) | 181 | 6 | 174 | 187 | Borate / Peroxide Fusion ICP |
| Er, Erbium (ppm) | 33.8 | 2.32 | 31.9 | 35.7 | Borate / Peroxide Fusion ICP |
| Er2O3, Erbium(III) oxide (ppm) | 38.6 | 2.65 | 36.5 | 40.8 | Borate / Peroxide Fusion ICP |
| Eu, Europium (ppm) | 292 | 14 | 280 | 303 | Borate / Peroxide Fusion ICP |
| Eu2O3, Europium(III) oxide (ppm) | 338 | 16 | 325 | 351 | Borate / Peroxide Fusion ICP |
| Fe, Iron (wt.%) | 33.42 | 0.758 | 32.22 | 34.62 | Borate / Peroxide Fusion ICP |
| Fe2O3, Iron(III) oxide (wt.%) | 47.78 | 1.084 | 46.07 | 49.49 | Borate / Peroxide Fusion ICP |
| Gd, Gadolinium (ppm) | 600 | 28 | 574 | 627 | Borate / Peroxide Fusion ICP |
| Gd2O3, Gadolinium(III) oxide (ppm) | 692 | 32 | 661 | 723 | Borate / Peroxide Fusion ICP |
| Hf, Hafnium (ppm) | 10.6 | 0.61 | 9.4 | 11.7 | Borate / Peroxide Fusion ICP |
| HfO2, Hafnium dioxide (ppm) | 12.5 | 0.72 | 11.1 | 13.8 | Borate / Peroxide Fusion ICP |
| Ho, Holmium (ppm) | 18.7 | 0.77 | 18.0 | 19.4 | Borate / Peroxide Fusion ICP |
| Ho2O3, Holmium(III) oxide (ppm) | 21.3 | 0.92 | 20.4 | 22.2 | Borate / Peroxide Fusion ICP |
| In, Indium (ppm) | 1.75 | 0.080 | 1.54 | 1.95 | Borate / Peroxide Fusion ICP |
| La, Lanthanum (wt.%) | 1.10 | 0.048 | 1.06 | 1.15 | Borate / Peroxide Fusion ICP |
| Lu, Lutetium (ppm) | 1.39 | 0.075 | 1.24 | 1.55 | Borate / Peroxide Fusion ICP |
| Lu2O3, Lutetium(III) oxide (ppm) | 1.58 | 0.085 | 1.40 | 1.76 | Borate / Peroxide Fusion ICP |
| Mg, Magnesium (wt.%) | 0.689 | 0.033 | 0.656 | 0.722 | Borate / Peroxide Fusion ICP |
| MgO, Magnesium oxide (wt.%) | 1.14 | 0.054 | 1.09 | 1.20 | Borate / Peroxide Fusion ICP |
| Mn, Manganese (wt.%) | 0.255 | 0.013 | 0.242 | 0.267 | Borate / Peroxide Fusion ICP |
| MnO, Manganese oxide (wt.%) | 0.329 | 0.016 | 0.313 | 0.344 | Borate / Peroxide Fusion ICP |
| Mo, Molybdenum (ppm) | 68 | 4.6 | 60 | 75 | Borate / Peroxide Fusion ICP |
| Nb, Niobium (wt.%) | 0.182 | 0.016 | 0.170 | 0.193 | Borate / Peroxide Fusion ICP |
| Nd, Neodymium (wt.%) | 0.936 | 0.056 | 0.894 | 0.978 | Borate / Peroxide Fusion ICP |
| Ni, Nickel (ppm) | 66 | 9 | 56 | 76 | Borate / Peroxide Fusion ICP |
| P, Phosphorus (wt.%) | 1.24 | 0.076 | 1.09 | 1.39 | Borate / Peroxide Fusion ICP |
| P2O5, Phosphorus(V) oxide (wt.%) | 2.84 | 0.174 | 2.50 | 3.18 | Borate / Peroxide Fusion ICP |
| Pb, Lead (ppm) | 178 | 19 | 158 | 197 | Borate / Peroxide Fusion ICP |
| Pr, Praseodymium (wt.%) | 0.238 | 0.009 | 0.227 | 0.248 | Borate / Peroxide Fusion ICP |
| Rb, Rubidium (ppm) | 3.98 | 0.52 | 3.17 | 4.79 | Borate / Peroxide Fusion ICP |
| S, Sulphur (wt.%) | 0.096 | 0.008 | 0.082 | 0.110 | Borate / Peroxide Fusion ICP |
| Sc, Scandium (ppm) | 125 | 11 | 112 | 138 | Borate / Peroxide Fusion ICP |
| Si, Silicon (wt.%) | 8.40 | 0.564 | 7.68 | 9.11 | Borate / Peroxide Fusion ICP |
| SiO2, Silicon dioxide (wt.%) | 17.96 | 1.207 | 16.42 | 19.49 | Borate / Peroxide Fusion ICP |
| Sm, Samarium (wt.%) | 0.131 | 0.007 | 0.125 | 0.138 | Borate / Peroxide Fusion ICP |
| Sm2O3, Samarium(III) oxide (wt.%) | 0.152 | 0.008 | 0.145 | 0.159 | Borate / Peroxide Fusion ICP |
| Sn, Tin (ppm) | 40.4 | 2.33 | 37.8 | 43.0 | Borate / Peroxide Fusion ICP |
| Sr, Strontium (wt.%) | 0.182 | 0.010 | 0.172 | 0.191 | Borate / Peroxide Fusion ICP |
| Ta, Tantalum (ppm) | 22.8 | 1.22 | 21.8 | 23.9 | Borate / Peroxide Fusion ICP |
| Tb, Terbium (ppm) | 48.2 | 2.80 | 45.8 | 50.7 | Borate / Peroxide Fusion ICP |
| Tb4O7, Terbium(III,IV) oxide (ppm) | 57 | 3.3 | 54 | 60 | Borate / Peroxide Fusion ICP |
| Th, Thorium (ppm) | 470 | 22 | 452 | 489 | Borate / Peroxide Fusion ICP |
| Ti, Titanium (wt.%) | 1.76 | 0.048 | 1.69 | 1.82 | Borate / Peroxide Fusion ICP |
| TiO2, Titanium dioxide (wt.%) | 2.93 | 0.080 | 2.82 | 3.04 | Borate / Peroxide Fusion ICP |
| Tm, Thulium (ppm) | 3.15 | 0.229 | 2.95 | 3.36 | Borate / Peroxide Fusion ICP |
| Tm2O3, Thulium(III) oxide (ppm) | 3.59 | 0.256 | 3.37 | 3.81 | Borate / Peroxide Fusion ICP |
| U, Uranium (ppm) | 15.8 | 0.48 | 15.2 | 16.5 | Borate / Peroxide Fusion ICP |
| V, Vanadium (ppm) | 203 | 18 | 186 | 219 | Borate / Peroxide Fusion ICP |
| V2O5, Vanadium(V) oxide (ppm) | 362 | 32 | 333 | 391 | Borate / Peroxide Fusion ICP |
| Y, Yttrium (ppm) | 389 | 19 | 373 | 404 | Borate / Peroxide Fusion ICP |
| Y2O3, Yttrium(III) oxide (ppm) | 494 | 24 | 474 | 513 | Borate / Peroxide Fusion ICP |
| Yb, Ytterbium (ppm) | 13.5 | 0.60 | 12.6 | 14.4 | Borate / Peroxide Fusion ICP |
| Yb2O3, Ytterbium(III) oxide (ppm) | 15.5 | 0.89 | 14.4 | 16.6 | Borate / Peroxide Fusion ICP |
| Zn, Zinc (wt.%) | 0.101 | 0.007 | 0.095 | 0.107 | Borate / Peroxide Fusion ICP |
| Zr, Zirconium (ppm) | 420 | 23 | 390 | 451 | Borate / Peroxide Fusion ICP |
| Al2O3, Aluminium(III) oxide (wt.%) | 8.05 | 0.257 | 7.84 | 8.26 | Borate Fusion XRF |
| BaO, Barium oxide (wt.%) | 0.177 | 0.008 | 0.165 | 0.189 | Borate Fusion XRF |
| CaO, Calcium oxide (wt.%) | 1.01 | 0.038 | 0.98 | 1.05 | Borate Fusion XRF |
| CeO2, Cerium(IV) oxide (wt.%) | 1.79 | 0.035 | 1.76 | 1.82 | Borate Fusion XRF |
| Cr2O3, Chromium(III) oxide (ppm) | 383 | 67 | 298 | 469 | Borate Fusion XRF |
| Eu2O3, Europium(III) oxide (ppm) | 318 | 97 | 234 | 401 | Borate Fusion XRF |
| Fe2O3, Iron(III) oxide (wt.%) | 47.84 | 1.106 | 46.87 | 48.81 | Borate Fusion XRF |
| Gd2O3, Gadolinium(III) oxide (ppm) | 687 | 101 | 569 | 805 | Borate Fusion XRF |
| Ho2O3, Holmium(III) oxide (ppm) | < 100 | IND | IND | IND | Borate Fusion XRF |
| K2O, Potassium oxide (wt.%) | 0.089 | 0.012 | 0.077 | 0.101 | Borate Fusion XRF |
| La2O3, Lanthanum(III) oxide (wt.%) | 1.32 | 0.032 | 1.30 | 1.35 | Borate Fusion XRF |
| Lu2O3, Lutetium(III) oxide (ppm) | < 100 | IND | IND | IND | Borate Fusion XRF |
| MgO, Magnesium oxide (wt.%) | 1.18 | 0.040 | 1.15 | 1.22 | Borate Fusion XRF |
| MnO, Manganese oxide (wt.%) | 0.347 | 0.015 | 0.330 | 0.364 | Borate Fusion XRF |
| Nb2O5, Niobium(V) oxide (wt.%) | 0.250 | 0.008 | 0.240 | 0.261 | Borate Fusion XRF |
| Nd2O3, Neodymium(III) oxide (wt.%) | 1.09 | 0.028 | 1.07 | 1.11 | Borate Fusion XRF |
| P2O5, Phosphorus(V) oxide (wt.%) | 2.90 | 0.143 | 2.80 | 3.01 | Borate Fusion XRF |
| Pr6O11, Praseodymium(III,IV) oxide (wt.%) | 0.293 | 0.019 | 0.276 | 0.310 | Borate Fusion XRF |
| SiO2, Silicon dioxide (wt.%) | 18.26 | 0.553 | 17.81 | 18.70 | Borate Fusion XRF |
| Sm2O3, Samarium(III) oxide (wt.%) | 0.156 | 0.015 | 0.143 | 0.170 | Borate Fusion XRF |
| SnO2, Tin dioxide (ppm) | < 100 | IND | IND | IND | Borate Fusion XRF |
| SrO, Strontium oxide (wt.%) | 0.220 | 0.018 | 0.196 | 0.244 | Borate Fusion XRF |
| Tb4O7, Terbium(III,IV) oxide (ppm) | < 100 | IND | IND | IND | Borate Fusion XRF |
| ThO2, Thorium dioxide (ppm) | 526 | 36 | 482 | 570 | Borate Fusion XRF |
| TiO2, Titanium dioxide (wt.%) | 2.96 | 0.071 | 2.89 | 3.02 | Borate Fusion XRF |
| Tm2O3, Thulium(III) oxide (ppm) | < 100 | IND | IND | IND | Borate Fusion XRF |
| U3O8, Uranium(V,VI) oxide (ppm) | < 100 | IND | IND | IND | Borate Fusion XRF |
| V2O5, Vanadium(V) oxide (ppm) | 392 | 75 | 253 | 531 | Borate Fusion XRF |
| Y2O3, Yttrium(III) oxide (ppm) | 491 | 40 | 409 | 572 | Borate Fusion XRF |
| Yb2O3, Ytterbium(III) oxide (ppm) | < 100 | IND | IND | IND | Borate Fusion XRF |
| ZrO2, Zirconium dioxide (ppm) | 559 | 41 | 522 | 596 | Borate Fusion XRF |
| LOI1000, Loss on ignition @1000 °C (wt.%) | 10.43 | 1.15 | 9.80 | 11.06 | Thermogravimetry |
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Certificate DataPack SDS NRAM (226 KB)Stock
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Pack SizePriceStock Level
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10g Sachet$6.3036,000 +
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1Kg Jar$454.00360 +
Specifications
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CRM State:
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Matrix:
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Mineralisation:
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CRM Group(s):