# Manganese ## 🧊 Manganese · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Mn&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Manganese"></iframe> *Manganese 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=Mn) <!-- ELEMENTS_MICROSIM:END --> !Manganese plate.svg *Plate 25 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.* - Manganese steel - alloys and hardness enhancement - Pyrolusite ore - manganese dioxide extraction and uses - Manganese nodules - deep-ocean mineral resources ## Links (Wikipedia order) <!-- injected from _registry/childlinks/Manganese.json (2026-07-30T02:09:12Z) --> `Abundance_of_elements_in_Earth's_crust` · [[Actinium]] · `Active_site` · `Alchemy` · `Alcohol_(chemistry)` · `Alkali_metal` · `Alkaline_battery` · `Alkaline_earth_metal` · `Alkyl_group` · `Allotropy` · [[Alloy]] · [[Aluminium]] · `Aluminium-26` · `Aluminium_alloy` · [[Americium]] · `Ancient_Magnesia` · [[Antimony]] · `Arginase` · [[Argon]] · `Arsenate` · [[Arsenic]] · `Aryl_group` · [[Astatine]] · `Astrocyte` · `Atomic_number` · `Atomic_radius` · [[Barium]] · `Barium_manganate` · `Basal_ganglia` · [[Berkelium]] · [[Beryllium]] · [[Beta_decay]] · `Biocide` · [[Bismuth]] · `Bixbyite` · `Block_(periodic_table)` · `Blood–brain_barrier` · `Blue` · [[Bohrium]] · [[Boiling_point]] · 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Infobox grounded in [Wikipedia: List of chemical elements](https://en.wikipedia.org/wiki/List_of_chemical_elements), fetched 2026-07-08. Full article: [Wikipedia: Manganese](https://en.wikipedia.org/wiki/Manganese). <!-- ELEMENTS_MICROSIM:BEGIN (auto-managed block - edits inside will be overwritten) --> ## Key facts (infobox) | | | |---|---| | Symbol - Z | Mn - 25 | | Group - Period - Block | 7 - 4 - d-block | | Atomic weight (Da) | 54.938 | | Density (g/cm3) | 7.21 | | Melting - Boiling (K) | 1519 - 2334 | | Electronegativity (Pauling) | 1.55 | | Crustal abundance (mg/kg) | 950 | | Origin | primordial | | Phase (STP) | solid | | Name origin | corrupted from magnesia negra; see magnesium | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Manganese has been known since antiquity in the form of manganese dioxide (pyrolusite), a black mineral that ancient glass makers used to remove the green tint from their glass. The element was isolated as a pure metal in 1774 by Swedish chemist Johann Gahn by heating pyrolusite with charcoal. The name derives from the Latin "magnesia nigra" (black magnesia), which was distinguished from "magnesia alba" (white magnesia, which became magnesium). For nearly two centuries, manganese remained primarily a laboratory curiosity until the steel industry discovered its critical role in alloy strength in the late 1800s [model-prior - verify]. Manganese is a hard, brittle, silver-gray transition metal that does not occur in pure form in nature. It oxidizes readily in air and reacts strongly with water [model-prior - verify]. The primary ore is pyrolusite (manganese dioxide), and significant amounts also occur in manganese nodules on the ocean floor [model-prior - verify]. Approximately 85 percent of manganese production is used in steel manufacturing, where it dramatically increases strength and hardness [model-prior - verify]. Manganese is also used in batteries, catalysts, and fertilizers. In the corpus, manganese carries profound symbolic weight. Mendeleev organized the periodic table around groups of elements, and the manganese group (group 7) was central to his prediction scheme. The element gap below manganese—where element 43 should fall—became Technetium, the first artificially created element and the patron of Technitium School. Manganese thus stands at the threshold between the predictable and the synthetic, between discovery and creation. ## 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 - History of Mining in Minnesota - manganese's role in steel alloys and the industrial Mesabi legacy ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Mn, group 7, period 4), 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: [[Chromium|Chromium (24)]] - [[Iron|Iron (26)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Manganese) : [Wikitube](https://en.wikitube.io/wiki/Manganese) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*