silicon
Let an agent identify silicon and its properties, relay isotopes, allotropes, production and uses from reference sources, explain its role in electronics and photovoltaics, and distinguish silicon from silica, silicone and silicates.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Identify What silicon is.
Properties
Properties.
Properties
Properties.
- What are the physical, chemical and electronic properties of silicon? definition
- Is the question about silicon, silica, silicone or silicates? boundary
Forms
Isotopes and allotropes.
Forms
Forms.
- What isotopes and allotropes exist, and what is native silicon? definition
- Which entry fits the specific form? action
Produce Production.
Grades
Grades and refining.
Grades
Grades.
- How is silicon produced and refined to metallurgical, polycrystalline and monocrystalline grades? provenance
- Which entry fits the Czochralski process? action
Supply
Supply.
Supply
Supply.
- Who produces silicon and polysilicon, with figures and sources? measurement
- Which sources are cited? provenance
Use Uses.
Electronics
Semiconductors.
Electronics
Electronics.
- Why is silicon the dominant semiconductor material, and how are wafers made? provenance
- Which entry fits semiconductor fabrication? action
Other
Solar, alloys and silicones.
Other
Other.
- How is silicon used in solar cells, aluminium alloys and silicone production? provenance
- Which references are standard? provenance
Context History and safety.
Discovery
Discovery.
Discovery
Discovery.
- How was silicon isolated by Berzelius in 1824, and how did it become the basis of electronics? provenance
- Which entry fits the history of the semiconductor? action
Safety
Safety.
Safety
Safety.
- What hazards do silicon dust and processing present, and how do they differ from silica hazards? provenance
- Which entry fits combustible dust? 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
- monocrystalline silicon, allotrope of silicon, native silicon, silicon-30, silicon-22, silicon-23, silicon-24, silicon-25, silicon-26, silicon-27, silicon-33, silicon-34
What it is Filled
A chemical element with symbol Si and atomic number 14, a hard, brittle crystalline metalloid that is the second most abundant element in the Earth crust, occurring as silica and silicates, produced from quartz in electric furnaces as metallurgical grade and refined to polycrystalline and monocrystalline silicon for semiconductors and solar cells; silicon also occurs rarely as native mineral, has three stable isotopes and radioactive ones such as silicon-32, and is combustible as fine powder.
Why it exists Filled
Let an agent identify silicon and its properties, relay isotopes, allotropes, production and uses from reference sources, explain its role in electronics and photovoltaics, and distinguish silicon from silica, silicone and silicates.
Distinguishing features Filled
- Semiconductor
- Crustal abundance
- Diamond cubic structure
- Basis of microelectronics
What robots and AI may and may not do Filled
Must not
- Confuse silicon with silicone or with crystalline silica when giving safety advice.
- Advise cutting or grinding silicon-bearing materials without dust control.
- Misstate where silicon or polysilicon was produced to hide forced labour or sanctions.
- Present the energy cost of refining silicon as negligible.
Only with a human decision
- Accepting supply chain claims about the origin of polysilicon.
May
- Describe silicon's properties, refining and uses in electronics, solar cells and alloys.
- Report safety data and handling rules for silicon and its dusts.
Moral aspects Filled
- Polysilicon supply chains have been linked to forced labour allegations.
- Silica dust from processing harms workers' lungs.
Who is affected
- Workers in refining and processing
- Buyers of solar products
- Communities near plants
Owners Filled
Steward
The holder of the material; trade and chemical regulators set the rules.
Master systems
- Chemical substance inventories
Links to other meta-models Filled
parent
- Q21073023 - registry parent class
related
- combustible powder - in registry terms, as fine dust
- metalloid - in the periodic table
- integrated circuit - as the substrate
- solar cell - as the main photovoltaic material
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.silicon
- Wikidata: Q670 (https://www.wikidata.org/wiki/Q670)
- symbol: Si
- CAS: 7440-21-3
Direct properties required Filled
- atomic number: 14 Z
- standard atomic weight: 28.085 u
- melting point: 1414 degrees C
- band gap: 1.12 eV - at 300 K
Recognition required Filled
- Element 14, symbol Si
- Metallurgical, polycrystalline and monocrystalline silicon
- Silica is the dioxide; silicone is a polymer; silicates are minerals
- A dark grey, lustrous, brittle crystalline solid.
Capabilities and actions required Filled
- relay properties and isotopes
- explain production and grades
- describe electronic and solar roles
- distinguish from silica and silicone
Hazards and failure modes required Filled
- Combustible dust explosions
- Confusing silicon with silica, silicone and silicates
- Supply concentration in polysilicon production
Standards and interfaces required Filled
- SEMI standards for semiconductor silicon
- Occupational limits for silica dust, distinct from silicon
- Combustible dust safety rules
Context of use required Filled
- Semiconductors, solar cells, alloys and silicones.
- metallurgical grade silicon
- polycrystalline and monocrystalline silicon
- amorphous silicon
- native silicon as a rare mineral
- stable isotopes silicon-28, 29 and 30 and radioactive isotopes such as silicon-22, 23 and 32
- silicon compounds and materials such as silica, silicones and silicides
Sources Filled
- Wikidata item Q670: silicon - identity and sense of the item
- Wikipedia: Silicon - general description of the item
Open questions
- Should monocrystalline silicon and polysilicon be separate entries?
- How should reference data be linked?
- The registry entry has merged aliases naming grades, allotropes and isotopes; should they be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q670/spec.json