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 ores sourced from Lynas Corporation’s Mount Weld Central Lanthanide Deposit. 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 – 8.84% 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 |
| 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 |
| 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 |
| 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 |
| 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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Pack SizePriceStock Level
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10g Sachet$6.6025,000 +
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1Kg Jar$470.00310 +
Specifications
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CRM State:
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Matrix:
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Mineralisation:
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CRM Group(s):