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436 Index Rare earth elements (REEs) (Continued) incompatibility, 131 ion-adsorption type deposits alkaline and calc-alkaline granitic rocks, 200 bearing minerals and susceptibilities to weathering, 216–218 clays, 224–225 complexes, 222–224 denudation/preservation, ore body, 226–227 distribution map, 203, 205f geochemistry, parent granites, 206–216 K€oppen–Geiger climate classification, 203, 204f leaching, 203–206, 205f mobility and fractionation, 219–221 surface weathering, 199 weathering, 203, 206 ionic radii, 131 iron oxide-apatite (IOA) deposits, 197–198 isolation, 129–130 mineralogy crystal chemistry, 167–179 earth evolution, 179–187 Orbite project, 202 ore reserves and grade, deposits, 187, 191f peralkaline rock-associated deposits alkaline granites, 196–197 Dubbo deposit, 197 Nechalacho deposit, 196 nepheline syenites, 196 Round Top deposit, 197 Strange Lake deposits, 197 placer deposits, 200–201, 201t rare earth oxide (REO), 132 sediment-hosted hydrothermal deposits, 199 source of, 135–136 supply and demand, 135, 136f transition metals, 131 types and distribution, deposits, 187, 188f valence states, 130–131 Rare earth ions configurational coordinate diagram, 9–11, 10f electronic transitions 4f–4f, 11–12 4f–5d, 12 energy transfer concentration quenching, 13 resonant, 12 sensitization, luminescence, 13 Red-emitting phosphors (oxy)nitrides AE2Si5N8:Eu2+ (AE1⁄4Ca, Sr, and Ba), 57–58, 58t, 59–61f CaAlSiN3:Eu2+, 54–56, 55–57f SrAlSi4N7:Eu2+, 59–63, 61–62f, 62t oxides Ca2SiO4:Eu2+, 35–37, 37f, 37t olivine-type NaMgPO4:Eu2+, 38–39, 38–39f REEs. See Rare earth elements (REEs) Relative sensitivity and temperature uncertainty dual-center emission calibration, Sr and dT curves, 382, 383f Eu3+/Tb3+ thermometers, 382–383, 384f population storage reservoir, 382–383 single-center emission, 375–377, 377f Relative thermal sensitivity, 355 Remote phosphor, 90–91, 90f Renormalization group theory, 300–301 Repeatability. See Thermometer performance Reproducibility. See Thermometer performance Resonant energy transfer, 12 Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction, 309 S Scaling relations, 296 Second order transitions. See Continuous phase transitions (CPTs) Sediment-hosted hydrothermal deposits, 199 Sensitization, luminescence, 13 Sigmoidal dependence calibration curve, 380–381 energy gap, 380–381 Eu3+/Tb3+-doped organic–inorganic hybrid NPs, 381–382, 381f Mott–Seitz model, 378–379 S-shaped curves, 378, 378f Siloxane-based hybrid magnetic nanoclusters, 349–350 Single-center emission Boltzmann law aqueous suspension, NaYF4:Yb3+/Er3+ NPs, 371–373, 372f energy-level diagram, 370, 371f Gaussian peaks, 373–375, 374fPDF Image | HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS
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