osmium
Let an agent explain osmium as an element, relay its properties, uses and hazards from reference sources, and separate the metal from osmium tetroxide and other platinum group 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 explain osmium as an element, relay its properties, uses and hazards from reference sources, and separate the metal from osmium tetroxide and other platinum group metals.
A hard, brittle, bluish-white metal, chemical element 76, of the platinum group and the densest naturally occurring element; obtained as a by-product of nickel and platinum refining, it is used in hard alloys for pen nibs, electrical contacts and instrument pivots, and as osmium tetroxide in microscopy and organic synthesis, a compound that is highly toxic.
What it is for: Hard alloys and, as the tetroxide, staining and synthesis.
It can be explain properties and isotopes; explain uses and production; relay hazards, especially of osmium tetroxide; distinguish from other platinum group metals.
Distinguishing features
Densest natural element
Platinum group metal
Forms volatile toxic tetroxide
Very rare
What it looks like
Bluish-white lustrous, very dense and hard metal, usually seen as powder or small pieces.
Physical character
atomic number: 76
density: about 22.6 g per cubic centimetre - densest natural element
melting point: about 3033 degrees C
How it is recognised
Element 76, platinum group
Densest natural element
Iridium is similarly dense; osmium tetroxide is a volatile toxic compound
Related models
is a kind of - the group
is related to - the neighbouring element
forms - the notable compound
is obtained from - as a by-product
In practice
Families and kinds
osmium metal and alloys
osmium tetroxide
osmium isotopes
osmiridium natural alloy
Identifiers
chemical symbol Os
CAS number 7440-04-2
Standards and regulation
GHS classification and labelling for osmium tetroxide
Laboratory safety rules for volatile toxic compounds
Occupational exposure limits
Failure modes and hazards
Osmium tetroxide toxicity to eyes and lungs
Powder oxidising to tetroxide in air
Confusion with iridium in density claims
Also called
+12
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.osmium
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Element What osmium is.
Chemistry.
Properties
Properties.
Properties
Properties.
- What are the properties and isotopes of osmium, and why is it the densest element? definition
- Is the question about the metal or about osmium tetroxide? boundary
Occurrence
Occurrence and production.
Occurrence
Occurrence.
- Where does osmium occur, and how is it produced? provenance
- Which entry fits platinum group metals? action
Use Applications.
Uses.
Alloys
Alloys.
Alloys
Alloys.
- How is osmium used in hard alloys and contacts? provenance
- Which entry fits a specific alloy? action
Tetroxide
Osmium tetroxide uses.
Tetroxide
Tetroxide.
- How is osmium tetroxide used in microscopy and synthesis, in general terms? provenance
- Which references are standard? provenance
Safety Hazards.
Safety.
Hazards
Toxicity.
Hazards
Hazards.
- What hazards does osmium tetroxide pose, and what handling rules apply? provenance
- Is the question about a specific laboratory, which needs its safety officer? boundary
Exposure
Exposure response.
Exposure
Exposure.
- What do authorities advise after exposure? provenance
- Is the user reporting an exposure, which needs emergency services? boundary
Context History and research.
Context.
History
Discovery.
History
History.
- How was osmium discovered and named? provenance
- Which entry fits the discoverer? action
Research
Research.
Research
Research.
- What research involves osmium, such as isotope geochemistry? provenance
- Which entry fits isotope geochemistry? action
What the second pass must settle
- Should osmium tetroxide be a separate entry?
- How should safety data be linked?
- The registry entry has merged isotope aliases; should they be split off?