# Strontium ## 🧊 Strontium · 3D (three.js) <iframe src="https://wikitube-elements.netlify.app/?el=Sr&embed=1" width="100%" height="620" frameborder="0" style="border:0;border-radius:12px;overflow:hidden" allowfullscreen loading="lazy" title="The Elements 3D microsim - Strontium"></iframe> *Strontium 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=Sr) <!-- ELEMENTS_MICROSIM:END --> !Strontium plate.svg *Plate 38 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.* - Strontium-90 - radioactive isotope and fallout from nuclear testing - Pyrotechnics and red flares - strontium's spectroscopic glow - Celestite mineral - strontium sulfate ore and chemistry ## Links (Wikipedia order) <!-- injected from _registry/childlinks/Strontium.json (2026-07-30T02:09:12Z) --> `Abundance_of_elements_in_Earth's_crust` · `Abundance_of_the_chemical_elements` · [[Actinium]] · `Adair_Crawford` · `Algae` · `Alkali_metal` · `Alkaline_earth_metal` · `Allotropy` · [[Aluminium]] · [[Americium]] · `Ammonia` · `Animal_migration_tracking` · [[Antimony]] · [[Argon]] · [[Arsenic]] · [[Astatine]] · `Atomic_clock` · `Atomic_number` · `Atomic_radius` · `Barbier_reaction` · [[Barium]] · `Barium_oxide` · [[Berkelium]] · [[Beryllium]] · `Bioaccumulation` · `Biological_half-life` · `Bioremediation` · `Biosorption` · [[Bismuth]] · `Block_(periodic_table)` · [[Bohrium]] · [[Boiling_point]] · `Bone` · `Bone_fracture` · [[Boron]] · `Boron_group` · `Bremsstrahlung` · [[Bromine]] · `CAS_Registry_Number` · [[Cadmium]] · [[Caesium]] · `Calcite` · [[Calcium]] · [[Californium]] · [[Carbon]] · `Carbon_dioxide` · `Carbon_group` · `Carbonate` · `Catchment_area` · `Celestine_(mineral)` · [[Cerium]] · `Chalcogen` · [[Chemical_element]] · [[Chlorine]] · [[Chromium]] · [[Cobalt]] · `Commission_on_Isotopic_Abundances_and_Atomic_Weights` · `Coordination_number` · [[Copernicium]] · [[Copper]] · `Coprecipitation` · `Covalent_radius` · `Critical_Raw_Materials_Act` · `Critical_raw_materials` · `Crown_ether` · [[Crystal_structure]] · [[Cubic_crystal_system]] · [[Curium]] · `Cyclopentadiene` · `Cyclopentadienyl` · [[Darmstadtium]] · [[Decay_product]] · `Dendrite_(crystal)` · [[Density]] · `Denticity` · [[Distillation]] · `Distrontium_ruthenate` · [[Dubnium]] · [[Dysprosium]] · [[Einsteinium]] · `Electrical_resistivity_and_conductivity` · `Electrolysis` · `Electron_capture` · `Electron_configuration` · `Electron_emission` · `Electronegativity` · 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`Shear_modulus` · [[Silicon]] · [[Silver]] · `Skeleton` · [[Sodium]] · `Solid` · `Soviet_Union` · `Specific_heat_capacity` · `Spectral_line` · `Spent_nuclear_fuel` · `Standard_atomic_weight` · `Standard_electrode_potential` · `Standard_temperature_and_pressure` · `Strontian` · `Strontianite` · `Strontium-89` · `Strontium-90` · `Strontium_acetate` · `Strontium_aluminate` · `Strontium_bromate` · `Strontium_bromide` · `Strontium_carbonate` · `Strontium_chlorate` · `Strontium_chloride` · `Strontium_chromate` · `Strontium_fluoride` · `Strontium_fluorochloride` · `Strontium_iodide` · `Strontium_nitride` · `Strontium_oxide` · `Strontium_selenide` · `Strontium_sulfide` · `Strontium_titanate` · `Sugar_beet` · `Sugar_industry` · `Sulfate` · `Sulfide` · [[Sulfur]] · `Superoxide` · `Synthetic_radioisotope` · [[Tantalum]] · [[Technetium]] · [[Tellurium]] · [[Tennessine]] · [[Terbium]] · [[Thallium]] · `Thomas_Charles_Hope` · [[Thorium]] · [[Thulium]] · `Timeline_of_chemical_element_discoveries` · [[Tin]] · [[Titanium]] · `Trace_radioisotope` · [[Tungsten]] · `United_States_Environmental_Protection_Agency` · [[Uranium]] · `Van_der_Waals_radius` · [[Vanadium]] · `Vapor_pressure` · `WebMD` · `William_Cruickshank_(chemist)` · `Witherite` · `World_War_I` · `X-ray` · [[Xenon]] · `Young's_modulus` · [[Ytterbium]] · [[Yttrium]] · `Yttrium-90` · [[Zinc]] · [[Zirconium]] > **Official MAIN - Chemical element, Z = 38.** 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: Strontium](https://en.wikipedia.org/wiki/Strontium). <!-- ELEMENTS_MICROSIM:BEGIN (auto-managed block - edits inside will be overwritten) --> ## Key facts (infobox) | | | |---|---| | Symbol - Z | Sr - 38 | | Group - Period - Block | 2 - 5 - s-block | | Atomic weight (Da) | 87.62 | | Density (g/cm3) | 2.64 | | Melting - Boiling (K) | 1050 - 1655 | | Electronegativity (Pauling) | 0.95 | | Crustal abundance (mg/kg) | 370 | | Origin | primordial | | Phase (STP) | solid | | Name origin | Strontian, a village in Scotland | *Bracketed weights are the mass number of the most stable isotope; values in parentheses are predictions (per the source table).* ## Story Strontium was isolated in 1808 by English chemist Humphry Davy through the electrolysis of molten strontium chloride. The element is named after Strontian, a village in the Scottish Highlands where the mineral strontianite (strontium carbonate) was discovered in 1790. Before Davy's isolation, strontium was known only as an ore and compounds; the pure metal was difficult to produce and remained expensive for much of the 19th century. In the 20th century, strontium gained widespread notoriety due to strontium-90, a radioactive isotope produced in nuclear fission that concentrates in milk and bone, raising health concerns following nuclear weapon testing and the Chernobyl accident [model-prior - verify]. Strontium is an alkaline earth metal (group 2) with chemical properties intermediate between the more reactive alkali metals and the less reactive transition metals. It does not occur in pure form in nature; the primary ores are strontianite (strontium carbonate) and celestite (strontium sulfate) [model-prior - verify]. The element's industrial uses are quite limited compared to other metals, but strontium compounds are important in specialized applications: pyrotechnic flares produce deep red light when strontium salts burn, strontium ranelate is used in osteoporosis treatment, and strontium ferrite is used in permanent magnets [model-prior - verify]. In the corpus, strontium exemplifies how elements can move from industrial utility into the realm of radiological concern. Strontium-90 remains a key environmental marker of past nuclear weapons testing, connecting the periodic table to 20th-century geopolitical history. ## 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 ## Vocational-Technical Semiotics The element speaks the canon's shared signs: the periodic table cell (Sr, group 2, period 5), 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: [[Rubidium|Rubidium (37)]] - [[Yttrium|Yttrium (39)]] - R.E.A.C.T.I.O.N. - Centers of Excellence ## Wikipedia : Wikitube **Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Strontium) : [Wikitube](https://en.wikitube.io/wiki/Strontium) ## Previous hub tags Tree parents: [[Helium]] · [[Hydrogen]] · [[Oxygen]]. Legacy hubs: none. --- *Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*