germanium
Let an agent identify germanium and its properties, relay production, uses, isotopes and history from reference sources, relay safety information, and distinguish it from silicon and other metalloids.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Identify What germanium is.
Properties
Properties.
Properties
Properties.
- What are the physical, chemical and semiconductor properties of germanium? definition
- Is the question about germanium or a related element such as silicon? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and which are stable or useful, such as in neutrino research? definition
- Which entry fits the specific isotope? action
Industry Production and uses.
Production
Production.
Production
Production.
- How is germanium recovered and refined, and who produces it, with sources? provenance
- Which sources are cited? provenance
Uses
Uses.
Uses
Uses.
- How is germanium used in fibre optics, infrared optics, electronics and catalysts? provenance
- Which entry fits a specific application? action
Safety Safety and supply.
Hazards
Hazards.
Hazards
Hazards.
- What hazards do germanium and its compounds present? provenance
- Is the user asking about a personal exposure, which needs a clinician or poison centre? boundary
Supply
Critical material status.
Supply
Supply.
- Why is germanium listed as a critical material, and what export controls apply? provenance
- Is the information current? boundary
Context History.
Discovery
Discovery.
Discovery
Discovery.
- How was germanium predicted by Mendeleev and discovered by Winkler in 1886? provenance
- Which references are standard? provenance
Electronics
Role in electronics history.
Electronics
Electronics.
- What role did germanium play in the first transistors, and why was it replaced by silicon? provenance
- Which entry fits the history of the transistor? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
- Other names and narrower kinds
- germanium-71, germanium-69, germanium-58, germanium-59, germanium-60, germanium-61, germanium-62, germanium-63, germanium-64, germanium-65, germanium-66, germanium-77
What it is Filled
A chemical element with symbol Ge and atomic number 32, a hard, brittle, greyish-white metalloid in the carbon group, a semiconductor with a diamond-like crystal structure; germanium was the material of the first transistors, is now used mainly in fibre optics, infrared optics, solar cells and polymerisation catalysts, is recovered as a by-product of zinc and coal processing, and has four stable isotopes plus naturally occurring radioactive germanium-76.
Why it exists Filled
Let an agent identify germanium and its properties, relay production, uses, isotopes and history from reference sources, relay safety information, and distinguish it from silicon and other metalloids.
Distinguishing features Filled
- Metalloid semiconductor
- First transistor material
- By-product of zinc
- Infrared transparency
What robots and AI may and may not do Filled
Must not
- Handle or release germanium compounds such as germane gas outside a controlled laboratory.
- Promote germanium supplements or compounds as health remedies.
- Help evade export restrictions on germanium.
- Dispose of germanium-bearing electronics as ordinary waste.
Only with a human decision
- Purchasing or moving germanium under export controls.
May
- Describe germanium's properties and uses in fibre optics, infrared optics and electronics.
- Report on germanium supply and trade restrictions with sources and dates.
- Distinguish germanium from silicon in device contexts.
Moral aspects Filled
- Some germanium compounds are toxic, and supplements have caused kidney harm.
- Concentrated supply makes germanium a strategic material with trade tensions.
Who is affected
- Workers handling it
- Consumers of supplements
- Industries dependent on supply
Owners Filled
Steward
The holder of the material; export authorities control its trade in some countries.
Links to other meta-models Filled
parent
- Q632350 - registry parent class
related
- covalent network solid - in registry terms
- metalloid - in the carbon group
- gallium - element 31
- arsenic - element 33
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.germanium
- Wikidata: Q867 (https://www.wikidata.org/wiki/Q867)
- symbol: Ge
- CAS: 7440-56-4
Direct properties required Filled
- atomic number: 32 Z
- standard atomic weight: 72.63 u
- melting point: 938.3 degrees C
- band gap: 0.67 eV - at room temperature
Recognition required Filled
- Element 32, symbol Ge
- Metalloid semiconductor in the carbon group
- Silicon and tin are the neighbouring group members
- A lustrous, hard, greyish-white brittle solid with a metallic sheen.
Capabilities and actions required Filled
- relay properties and isotopes
- explain production and uses
- relay history and safety
- distinguish from related elements
Hazards and failure modes required Filled
- Toxicity of some compounds such as germane gas
- Supply concentration and export restrictions
- Confusion with silicon in device contexts
Standards and interfaces required Filled
- Chemical safety data sheets
- Critical raw material listings in the EU and elsewhere
- Export controls in some producing countries
Context of use required Filled
- Fibre optics, infrared optics, semiconductors and catalysts.
- germanium metal and crystals
- germanium compounds such as the dioxide and tetrachloride
- isotopes from germanium-58 to germanium-89, with five stable isotopes
- silicon-germanium alloys
Sources Filled
- Wikidata item Q867: germanium - identity and sense of the item
- Wikipedia: Germanium - general description of the item
Open questions
- Should isotopes be separate entries?
- How should reference data be linked?
- The registry entry has merged aliases naming isotopes; should they be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q867/spec.json