# Cerium
## 🧊 Cerium · 3D (three.js)
<iframe src="https://wikitube-elements.netlify.app/?el=Ce&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Cerium"></iframe>
*Cerium in the live three.js Elements explorer — drag to orbit the atom, click any tile to compare, slide the temperature.* · [▶ open full](https://wikitube-elements.netlify.app/?el=Ce)
<!-- ELEMENTS_MICROSIM:END -->
!Cerium plate.svg
*Plate 58 of 118 - animated Bohr shells, stylized per Madelung filling; engraving style per house Arcanity kit.*
## Microsim To Do
*Claimable rows, house pattern. Real Wikipedia articles only.*
- Cerium oxide - catalyst in three-way catalytic converters
- [[Cerium|Cerium]] - abundance and extraction from rare-earth ores
- Polishing compound - ceria in glass finishing
- [[Ceres_(dwarf_planet)|Ceres (dwarf planet)]] - namesake origin
## Links (Wikipedia order)
<!-- injected from _registry/childlinks/Cerium.json (2026-07-30T02:09:12Z) -->
`Abundance_of_elements_in_Earth's_crust` · `Actinide` · [[Actinium]] · `Alkali_metal` · `Alkaline_earth_metal` · `Allotropy` · [[Alpha_decay]] · [[Aluminium]] · `American_Conference_of_Governmental_Industrial_Hygienists` · [[Americium]] · `Ames_Project` · `Ammonium_cerium(IV)_sulfate` · `Ammonium_oxalate` · [[Antimony]] · [[Argon]] · [[Arsenic]] · [[Astatine]] · `Asteroid` · `Atomic_number` · `Atomic_radius` · `Auschwitz_concentration_camp` · [[Barium]] · `Bastnäs` · `Bastnäsite` · `Belousov–Zhabotinsky_reaction` · [[Berkelium]] · [[Beryllium]] · [[Beta_decay]] · [[Bismuth]] · `Bismuthate` · `Block_(periodic_table)` · [[Bohrium]] · [[Boiling_point]] · [[Boron]] · `Boron_group` · `Brinell_hardness_test` · [[Bromine]] · `Bulk_modulus` · `CAS_Registry_Number` · [[Cadmium]] · `Cadmium_pigments` · [[Caesium]] · [[Calcium]] · `Calcium_carbonate` · `Calcium_phosphate` · [[Californium]] · `Calutron` · [[Carbon]] · `Carbon_group` · `Carl_Auer_von_Welsbach` · `Carl_Gustaf_Mosander` · `Catalytic_converter` · [[Ceres_(dwarf_planet)]] · `Ceres_(mythology)` · `Ceric_ammonium_nitrate` · `Cerimetry` · `Cerium(III)_acetylacetonate` · `Cerium(III)_bromide` · `Cerium(III)_carbonate` · `Cerium(III)_chloride` · `Cerium(III)_fluoride` · `Cerium(III)_hydroxide` · `Cerium(III)_iodide` · `Cerium(III)_methanesulfonate` · `Cerium(III)_oxide` · `Cerium(III)_selenate` · `Cerium(III)_sulfate` · `Cerium(III)_sulfide` · `Cerium(IV)_fluoride` · `Cerium(IV)_hydroxide` · `Cerium(IV)_oxide` · `Cerium(IV)_perchlorate` · `Cerium(IV)_selenate` · `Cerium(IV)_sulfate` · `Cerium_compounds` · `Cerium_diiodide` · `Cerium_hexaboride` · `Cerium_monoselenide` · `Cerium_monosulfide` · `Cerium_nitrates` · `Cerium_nitride` · `Cerium_oxalate` · `Cerium_phosphide` · `Cerium_stearate` · `Cerocene` · `Chalcogen` · `Charge-transfer_complex` · `Chemical-mechanical_polishing` · [[Chemical_element]] · `Chemical_symbol` · [[Chlorine]] · [[Chromium]] · `Close-packing_of_equal_spheres` · [[Cobalt]] · `Commission_on_Isotopic_Abundances_and_Atomic_Weights` · [[Copernicium]] · [[Copper]] · `Covalent_radius` · `Crown_ether` · `Crucible` · [[Crystal_structure]] · [[Cubic_crystal_system]] · [[Curium]] · `Cyclooctatetraenide_anion` · `Cyclopentadienyl` · `Cylinder_head` · `Cytotoxicity` · [[Darmstadtium]] · [[Decay_product]] · `Delocalized_electron` · [[Density]] · `Didymium` · `Dopant` · `Double_electron_capture` · [[Dubnium]] · `Dwarf_planet` · [[Dysprosium]] · [[Einsteinium]] · `Electrical_resistivity_and_conductivity` · `Electrochemistry` · `Electron_capture` · `Electron_configuration` · `Electronegativity` · `Enthalpy_of_fusion` · `Enthalpy_of_vaporization` · [[Erbium]] · `European_Physical_Journal_A` · [[Europium]] · `F-center` · [[Fermium]] · `Ferrocerium` · `Fire_extinguisher` · `Fisher_Scientific` · [[Flerovium]] · [[Fluorine]] · `Fluorite` · [[Francium]] · `GHS_hazard_pictograms` · `GHS_hazard_statements` · `GHS_precautionary_statements` · [[Gadolinium]] · [[Gallium]] · `Gas_mantle` · [[Gas_tungsten_arc_welding]] · [[Germanium]] · `Globally_Harmonized_System_of_Classification_and_Labelling_of_Chemicals` · [[Gold]] · `Grignard_reagent` · `Group_(periodic_table)` · `Group_10_element` · `Group_11_element` · `Group_12_element` · `Group_3_element` · `Group_4_element` · `Group_5_element` · `Group_6_element` · `Group_7_element` · `Group_8_element` · `Group_9_element` · [[Hafnium]] · [[Half-life]] · `Halogen` · `Hardness` · [[Hassium]] · [[Helium]] · [[Holmium]] · `Hugh_Chisholm` · `Humphry_Davy` · `Hydrochloric_acid` · [[Hydrogen]] · [[Indium]] · `Interstitial_lung_disease` · [[Iodine]] · [[Ionization_energy]] · [[Iridium]] · [[Iron]] · `Isotope` · `Isotopes_of_cerium` · `Isotopes_of_lanthanum` · `Isotopes_of_neodymium` · `Isotopes_of_praseodymium` · `Kelvin` · [[Krypton]] · `Lanthanide` · [[Lanthanum]] · `Lattice_constant` · [[Lawrencium]] · [[Lead]] · `Light-emitting_diode` · `Lightfastness` · `List_of_chemical_element_name_etymologies` · `List_of_data_references_for_chemical_elements` · `List_of_former_planets` · `List_of_inorganic_pigments` · [[Lithium]] · [[Livermorium]] · [[Lutetium]] · [[Magnesium]] · `Magnetic_susceptibility` · `Magnetism` · [[Manganese]] · `Manhattan_Project` · `Martin_Heinrich_Klaproth` · `Mary_Elvira_Weeks` · [[Meitnerium]] · `Melting_point` · [[Mendelevium]] · [[Mercury_(element)]] · `Metal` · `Methemoglobinemia` · `Methylacidiphilum_fumariolicum` · `Mischmetal` · `Molar_heat_capacity` · `Molar_ionization_energies_of_the_elements` · [[Molybdenum]] · `Monazite` · [[Moscovium]] · `Mudpot` · `NFPA_704` · `NOx` · `Natural_abundance` · [[Neodymium]] · [[Neon]] · [[Neptunium]] · [[Nickel]] · [[Nihonium]] · [[Niobium]] · [[Nitrogen]] · [[Nobelium]] · [[Noble_gas]] · `Norman_Greenwood` · [[Nuclear_fuel]] · `Nucleophile` · `Occupational_Safety_and_Health_Administration` · `Occupational_exposure_limit` · [[Oganesson]] · `Organic_synthesis` · `Organocerium_chemistry` · `Organolanthanide_chemistry` · [[Osmium]] · `Oxalate` · `Oxidation_state` · [[Oxygen]] · [[Palladium]] · `Passivation_(chemistry)` · `Pearson_symbol` · `Period_(periodic_table)` · `Period_1_element` · `Period_2_element` · `Period_3_element` · `Period_4_element` · `Period_5_element` · `Period_6_element` · `Period_7_element` · `Periodic_table` · `Phase_(matter)` · `Phosphate_mineral` · `Phosphor` · [[Phosphorus]] · `Picometre` · `Pigment` · [[Platinum]] · [[Plutonium]] · `Pnictogen` · `Poisson's_ratio` · [[Polonium]] · [[Potassium]] · [[Praseodymium]] · `Primo_Levi` · `Primordial_nuclide` · [[Promethium]] · [[Protactinium]] · [[Radioactive_decay]] · [[Radium]] · [[Radon]] · `Rare-earth_element` · `Redox` · `Reducing_agent` · `Reduction_potential` · `Refractory` · [[Rhenium]] · [[Rhodium]] · [[Roentgenium]] · `Room_temperature` · [[Rubidium]] · [[Ruthenium]] · [[Rutherfordium]] · [[Samarium]] · [[Scandium]] · `Scintillator` · [[Seaborgium]] · [[Selenium]] · `Shear_modulus` · [[Silicon]] · [[Silver]] · [[Sodium]] · `Sodium_hydroxide` · `Solid` · `Specific_heat_capacity` · `Spectral_line` · `Speed_of_sound` · `Standard_atomic_weight` · `Standard_temperature_and_pressure` · [[Strontium]] · [[Sulfur]] · `Synthetic_radioisotope` · [[Tantalum]] · [[Technetium]] · [[Tellurium]] · [[Tennessine]] · [[Terbium]] · [[Thallium]] · [[Thorium]] · `Thorium_dioxide` · `Thorium_oxide` · [[Thulium]] · `Timeline_of_chemical_element_discoveries` · [[Tin]] · [[Titanium]] · [[Tungsten]] · `Ullmann's_Encyclopedia_of_Industrial_Chemistry` · `United_States_Department_of_the_Interior` · `United_States_Geological_Survey` · [[Uranium]] · `Uranocene` · `Valence_electron` · [[Vanadium]] · `Vapor_pressure` · `Vickers_hardness_test` · [[Wayback_Machine]] · `Wilhelm_Hisinger` · `William_Francis_Hillebrand` · [[Xenon]] · `Young's_modulus` · [[Ytterbium]] · [[Yttrium]] · `Yttrium_aluminium_garnet` · [[Zinc]] · `Zircon` · [[Zirconium]]
> **Official MAIN - Chemical element, Z = 58.** Part of the Elements Canon (one canonical page per element). Infobox grounded in [Wikipedia: List of chemical elements](https://en.wikipedia.org/wiki/List_of_chemical_elements), fetched 2026-07-08. Full article: [Wikipedia: Cerium](https://en.wikipedia.org/wiki/Cerium).
<!-- ELEMENTS_MICROSIM:BEGIN (auto-managed block - edits inside will be overwritten) -->
## Key facts (infobox)
| | |
|---|---|
| Symbol - Z | Ce - 58 |
| Group - Period - Block | f - 6 - f-block |
| Atomic weight (Da) | 140.12 |
| Density (g/cm3) | 6.770 |
| Melting - Boiling (K) | 1068 - 3716 |
| Electronegativity (Pauling) | 1.12 |
| Crustal abundance (mg/kg) | 66.5 |
| Origin | primordial |
| Phase (STP) | solid |
| Name origin | Ceres, the dwarf planet |
*Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).*
## Story
Cerium was discovered in 1803 independently by Swedish and German chemists while analyzing mineral samples. It was named after the dwarf planet (then asteroid) Ceres. Cerium is the most abundant of the rare-earth elements (66.5 mg/kg) and occurs in monazite, bastnasite, and other minerals.
Cerium is a soft, silvery metal that can exhibit variable oxidation states (+3 and +4), a property unique in its versatility among the lanthanides. Cerium oxide (ceria, CeOâ‚‚) is a crucial catalyst and polishing agent: it catalyzes the oxidation of carbon monoxide in automotive catalytic converters and is used in glass polishing compounds. [model-prior - verify] Cerium fluoride and other cerium compounds are used in optical devices and in welding electrodes. Cerium is one of the few rare-earth elements with large production volumes and established supply chains.
The corpus engages cerium as the economic gateway to rare-earth science—the most abundant lanthanide and the backbone of catalytic converters and sustainable refining.
## Corpus connections
- R.E.A.C.T.I.O.N. - the Chemistry hub
- Centers of Excellence Portal
- [[Technetium|Technetium - the element made before found]] - the canon's patron - and Technitium, the School
- Solar System Mining Surveys - cerium and the rare-earth economy
## Vocational-Technical Semiotics
The element speaks the canon's shared signs: the periodic table cell (Ce, group f, period 6), isotope notation, and hazard pictograms ghs where handling demands it.
## Sources
Infobox: [en.wikipedia.org/wiki/List_of_chemical_elements](https://en.wikipedia.org/wiki/List_of_chemical_elements) (fetched 2026-07-08); etymology per the same table's notes. Story sources to be added at enrichment.
## Navigation
- Canon: Elements Canon index - neighbors by Z: [[Lanthanum|Lanthanum (57)]] - [[Praseodymium|Praseodymium (59)]]
- R.E.A.C.T.I.O.N. - Centers of Excellence
## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Cerium) : [Wikitube](https://en.wikitube.io/wiki/Cerium)
## Previous hub tags
Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]].
Legacy hubs: none.
---
*Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*