# Iridium ## 🧊 Iridium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Ir&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Iridium"></iframe> *Iridium 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=Ir) <!-- ELEMENTS_MICROSIM:END --> !Iridium plate.svg *Plate 77 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.* - Spark plug - iridium electrodes for engine ignition - Single-crystal growth - iridium crucibles and Czochralski method - Medical device - iridium and platinum surgical implants - Corrosion resistance - platinum-group metal inertness ## Links (Wikipedia order) <!-- injected from _registry/childlinks/Iridium.json (2026-07-30T02:09:12Z) --> `2019_revision_of_the_SI` · `Abundance_of_elements_in_Earth's_crust` · `Accounts_of_Chemical_Research` · `Acetic_acid` · `Acid` · [[Actinium]] · `Alchemical_symbol` · `Alkali` · `Alkali_metal` · `Alkaline_earth_metal` · [[Alloy]] · `Alluvium` · [[Alpha_decay]] · [[Aluminium]] · `Alvarez_hypothesis` · [[Americium]] · `Ammonium` · `Andreas_Sigismund_Marggraf` · `Anhydrous` · `Anode` · `Antimonide` · [[Antimony]] · `Antonio_de_Ulloa` · `Aqua_regia` · [[Argon]] · [[Arsenic]] · `Arsenide` · [[Astatine]] · `Asteroid` · `Asymmetric_hydrogenation` · `Atom` · `Atomic_number` · `Atomic_radius` · [[Barium]] · [[Berkelium]] · 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[[Titanium]] · `Torbern_Bergman` · `Transfer_hydrogenation` · `Transition_metal` · [[Tungsten]] · `Twelve_Olympians` · [[Uranium]] · [[Vanadium]] · `Vapor_pressure` · `Vaska's_complex` · `Vickers_hardness_test` · `Volcano` · `Vredefort_impact_structure` · [[Wayback_Machine]] · `Welding` · `William_Crookes` · `Wing` · `World's_fair` · `X-ray_crystallography` · [[Xenon]] · `Young's_modulus` · [[Ytterbium]] · [[Yttrium]] · `Yucatán_Peninsula` · `Zimbabwe` · [[Zinc]] · [[Zirconium]] > **Official MAIN - Chemical element, Z = 77.** 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: Iridium](https://en.wikipedia.org/wiki/Iridium). <!-- ELEMENTS_MICROSIM:BEGIN (auto-managed block - edits inside will be overwritten) --> ## Key facts (infobox) | | | |---|---| | Symbol - Z | Ir - 77 | | Group - Period - Block | 9 - 6 - d-block | | Atomic weight (Da) | 192.22 | | Density (g/cm3) | 22.56 | | Melting - Boiling (K) | 2719 - 4701 | | Electronegativity (Pauling) | 2.20 | | Crustal abundance (mg/kg) | 0.001 | | Origin | primordial | | Phase (STP) | solid | | Name origin | Iris, Greek goddess of the rainbow | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Iridium was discovered in 1803 by British chemist Smithson Tennant alongside osmium, both extracted from platinum ore residues [model-prior - verify]. Its name derives from Iris, the Greek goddess of the rainbow, because of the variety of colored oxides iridium forms when heated [model-prior - verify]. Iridium is the second-densest element and, together with osmium, defines the extreme end of the density spectrum for naturally occurring materials. Iridium is a silvery-white transition metal with exceptional hardness, corrosion resistance, and a melting point of 2719 K [model-prior - verify]. It is used in alloys for the most demanding applications: spark plugs for high-performance engines, crucibles for growing high-purity crystals, surgical implants, and precision laboratory equipment [model-prior - verify]. Iridium-platinum alloys are standard in devices that require maximum durability and chemical inertness. Like osmium, iridium is recovered as a by-product of platinum mining and remains among the rarest of the commercially mined elements. Iridium's niche applications and extraordinary rarity make it a symbol of technological depth: an element so specialized that most people encounter it only indirectly, through the performance of devices that depend silently on its indestructible properties. ## 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 - Space Mining In Minnesota - platinum-group metals and precious-material supply - History of Mining in Minnesota - noble-metal applications and durability ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Ir, group 9, 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: [[Osmium|Osmium (76)]] - [[Platinum|Platinum (78)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Iridium) : [Wikitube](https://en.wikitube.io/wiki/Iridium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*