delta iron
- noun
- Specialized
:
hierro delta
- The crystal structure of delta iron differs from other allotropes due to its body-centered cubic arrangement.
Examples
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Understanding the transformation to delta iron helps metallurgists control the properties of steel.
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Delta iron forms when iron is heated above 1403°C in a laboratory setting.
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The delta iron phase is crucial in steel production.
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Scientists study delta irons for their unique properties.
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Delta iron forms when iron is heated above 1403°C in a laboratory setting.
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The crystal structure of delta iron differs from other allotropes due to its body-centered cubic arrangement.
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Understanding the transformation to delta iron helps metallurgists control the properties of steel.
Surface Forms
Morphology
delta + iron
This is a specialised metallurgical term naming a particular crystal phase/allotrope of iron; the specific sense (a high-temperature allotrope) is technical and not recoverable from common meanings of "delta" (Greek letter, change, river mouth) plus "iron." A B1 learner who knows the constituent words would not be able to predict this specialized scientific meaning, so the expression is opaque.
Etymology
Delta iron gets its name from scientists who used Greek letters to label different forms of iron. One popular story says that delta was given to the form seen at very high heat just before melting, so the name reminds us it is the high-temperature 'stage' of iron.
