manganese
Let an agent identify manganese and its properties, relay production, uses, isotopes and biological roles from reference sources, relay safety and exposure information, and distinguish it from magnesium and similar metals.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent identify manganese and its properties, relay production, uses, isotopes and biological roles from reference sources, relay safety and exposure information, and distinguish it from magnesium and similar metals.
A chemical element with symbol Mn and atomic number 25, a hard, brittle, silvery transition metal that is not found free in nature but is abundant in ores such as pyrolusite; manganese is essential to steelmaking as a deoxidiser and alloying element, is used in batteries, fertilisers and pigments, is an essential trace nutrient for organisms, and has one stable isotope, manganese-55.
What it is for: Steel alloying, batteries, chemicals and nutrition.
It can be relay properties and isotopes; explain production and uses; relay health and safety information; distinguish from similar elements.
Distinguishing features
Hard and brittle
Many oxidation states
Steel essential
Trace nutrient
What it looks like
A hard, brittle, silvery-grey metal that tarnishes in air.
Physical character
atomic number: 25 Z
standard atomic weight: 54.938 u
melting point: 1246 degrees C
density: 7.21 g/cm3
How it is recognised
Element 25, symbol Mn
Transition metal essential to steel
Magnesium is a different, lighter metal with a similar name
Related models
is a kind of - group 7
is a kind of - in registry terms
is used in - as an alloying element
is confused with - by name
In practice
Families and kinds
manganese metal and ferromanganese
manganese compounds such as dioxide, sulfate and permanganate
isotopes from manganese-44 to manganese-73, with Mn-55 stable
manganese in batteries and pigments
manganese nodules on the sea floor
Identifiers
symbol Mn
CAS 7439-96-5
Standards and regulation
Occupational exposure limits for manganese dust and fumes
Drinking water guidelines
Deep-sea mining regulation for nodules
Chemical safety data sheets
Failure modes and hazards
Manganism from chronic inhalation exposure
Dust flammability
Environmental impact of mining
Confusion with magnesium
Also called
+1
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.manganese
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Identify What manganese is.
Identity.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of manganese, including its oxidation states? definition
- Is the question about manganese or magnesium? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and which are used in research or dating? definition
- Which entry fits the specific isotope? action
Industry Production and uses.
Supply.
Production
Mining and refining.
Production
Production.
- How is manganese mined and refined, and who produces it, with sources? provenance
- Which sources are cited? provenance
Uses
Uses.
Uses
Uses.
- How is manganese used in steel, batteries, chemicals and fertilisers? provenance
- Which entry fits a specific use? action
Health Biology and safety.
Safety.
Nutrition
Nutrition.
Nutrition
Nutrition.
- What role does manganese play as a nutrient, and what do dietary references say? provenance
- Is the user asking about personal supplementation, which needs a professional? boundary
Exposure
Exposure and toxicity.
Exposure
Exposure.
- What are the effects of excess exposure, and what limits apply? provenance
- Which entry fits occupational health? action
Context History and environment.
Context.
History
History.
History
History.
- How was manganese isolated in 1774, and how did its use in steel develop? provenance
- Which references are standard? provenance
Nodules
Sea-floor nodules.
Nodules
Nodules.
- What are manganese nodules, and what debates surround deep-sea mining, with positions attributed? provenance
- Is the presentation neutral? boundary
What the second pass must settle
- Should isotopes and manganese nodules be separate entries?
- How should exposure limits be linked?
- The registry entry has merged aliases naming isotopes; should they be split off?