Goodenough–Kanamori rules
E773254
The Goodenough–Kanamori rules are a set of semi-empirical guidelines that predict the sign and strength of superexchange magnetic interactions between ions in transition-metal oxides based on bond angles and orbital overlap.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Goodenough–Kanamori rules canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9018755 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
Target entity: Goodenough–Kanamori rules Context triple: [John B. Goodenough, knownFor, Goodenough–Kanamori rules]
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A.
Soddy–Fajans rule
The Soddy–Fajans rule is a principle in nuclear chemistry that predicts how the emission of alpha or beta particles changes one element into another by altering its position in the periodic table.
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B.
Woodward–Hoffmann rules
The Woodward–Hoffmann rules are fundamental principles in organic chemistry that predict the stereochemistry and feasibility of pericyclic reactions based on orbital symmetry considerations.
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C.
Jahn–Teller effect
The Jahn–Teller effect is a phenomenon in molecular and solid-state physics where electronically degenerate states cause spontaneous geometric distortions that lower a system’s symmetry and energy.
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D.
Herzberg–Teller approximation
The Herzberg–Teller approximation is a refinement in molecular spectroscopy that accounts for vibronic coupling by allowing electronic transition dipole moments to depend on nuclear coordinates, explaining intensity in otherwise forbidden transitions.
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E.
Landau–Peierls instability
Landau–Peierls instability is a theoretical prediction in condensed matter physics that shows how long-wavelength thermal fluctuations destroy true long-range positional order in low-dimensional crystalline systems.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Goodenough–Kanamori rules Target entity description: The Goodenough–Kanamori rules are a set of semi-empirical guidelines that predict the sign and strength of superexchange magnetic interactions between ions in transition-metal oxides based on bond angles and orbital overlap.
-
A.
Soddy–Fajans rule
The Soddy–Fajans rule is a principle in nuclear chemistry that predicts how the emission of alpha or beta particles changes one element into another by altering its position in the periodic table.
-
B.
Woodward–Hoffmann rules
The Woodward–Hoffmann rules are fundamental principles in organic chemistry that predict the stereochemistry and feasibility of pericyclic reactions based on orbital symmetry considerations.
-
C.
Jahn–Teller effect
The Jahn–Teller effect is a phenomenon in molecular and solid-state physics where electronically degenerate states cause spontaneous geometric distortions that lower a system’s symmetry and energy.
-
D.
Herzberg–Teller approximation
The Herzberg–Teller approximation is a refinement in molecular spectroscopy that accounts for vibronic coupling by allowing electronic transition dipole moments to depend on nuclear coordinates, explaining intensity in otherwise forbidden transitions.
-
E.
Landau–Peierls instability
Landau–Peierls instability is a theoretical prediction in condensed matter physics that shows how long-wavelength thermal fluctuations destroy true long-range positional order in low-dimensional crystalline systems.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
concept in magnetism
ⓘ
semi-empirical guideline ⓘ theoretical rule in solid-state physics ⓘ |
| appliesBestTo | insulating oxides ⓘ |
| appliesTo |
M–O–M superexchange pathways
ⓘ
insulating transition-metal compounds ⓘ transition-metal oxides ⓘ |
| assumes | localized d electrons ⓘ |
| basedOn |
bond angle
ⓘ
electron occupancy of d orbitals ⓘ orbital overlap ⓘ orbital symmetry ⓘ |
| componentConcept |
180-degree superexchange rule
ⓘ
90-degree superexchange rule ⓘ half-filled versus empty or full orbital interactions ⓘ |
| considers |
Hund’s rule on the anion
ⓘ
Pauli exclusion principle NERFINISHED ⓘ cation–anion–cation geometry ⓘ overlap between metal d and ligand p orbitals ⓘ |
| describes |
magnetic exchange interactions
ⓘ
superexchange interactions ⓘ |
| field |
condensed matter physics
ⓘ
magnetism ⓘ solid-state chemistry ⓘ transition-metal oxides ⓘ |
| hasAbbreviation | G–K rules NERFINISHED ⓘ |
| historicalPeriod | mid-20th century ⓘ |
| influences |
analysis of exchange pathways in complex oxides
ⓘ
understanding of perovskite magnetism ⓘ |
| involves |
crystal field splitting
ⓘ
spin alignment of neighboring ions ⓘ |
| language | English ⓘ |
| lessAccurateFor | itinerant electron systems ⓘ |
| namedAfter |
John B. Goodenough
NERFINISHED
ⓘ
Junjiro Kanamori NERFINISHED ⓘ |
| predicts |
antiferromagnetic coupling
ⓘ
ferromagnetic coupling ⓘ sign of superexchange interaction ⓘ strength of superexchange interaction ⓘ |
| relatedTo |
Goodenough–Kanamori–Anderson rules
NERFINISHED
ⓘ
superexchange theory of Anderson ⓘ |
| typicalBondAngleCondition |
180-degree metal–oxygen–metal bond favors strong superexchange
GENERATED
ⓘ
90-degree metal–oxygen–metal bond often leads to weaker or ferromagnetic superexchange GENERATED ⓘ |
| usedFor |
design of magnetic materials
ⓘ
interpretation of magnetic structures in oxides ⓘ qualitative prediction of magnetic ordering ⓘ |
How these facts were elicited
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You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Subject: Goodenough–Kanamori rules Description of subject: The Goodenough–Kanamori rules are a set of semi-empirical guidelines that predict the sign and strength of superexchange magnetic interactions between ions in transition-metal oxides based on bond angles and orbital overlap.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.