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.
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 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.
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.
What it is for: Semiconductors, solar cells, alloys and silicones.
It can be relay properties and isotopes; explain production and grades; describe electronic and solar roles; distinguish from silica and silicone.
Distinguishing features
Semiconductor
Crustal abundance
Diamond cubic structure
Basis of microelectronics
What it looks like
A dark grey, lustrous, brittle crystalline solid.
Physical character
atomic number: 14 Z
standard atomic weight: 28.085 u
melting point: 1414 degrees C
band gap: 1.12 eV - at 300 K
How it is recognised
Element 14, symbol Si
Metallurgical, polycrystalline and monocrystalline silicon
Silica is the dioxide; silicone is a polymer; silicates are minerals
Related models
is a kind of - in registry terms, as fine dust
is a kind of - in the periodic table
is used in - as the substrate
is used in - as the main photovoltaic material
In practice
Families and kinds
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
Identifiers
symbol Si
CAS 7440-21-3
Standards and regulation
SEMI standards for semiconductor silicon
Occupational limits for silica dust, distinct from silicon
Combustible dust safety rules
Failure modes and hazards
Combustible dust explosions
Confusing silicon with silica, silicone and silicates
Supply concentration in polysilicon production
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.silicon
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 silicon is.
Identity.
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.
Industry.
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.
Application.
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.
Context.
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
What the second pass must settle
- 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?