packing fraction: meaning, definition, pronunciation and examples
Very lowTechnical/scientific
Quick answer
What does “packing fraction” mean?
A dimensionless quantity representing the fraction of volume or space occupied by particles within a structure, most commonly in nuclear or materials science.
Audio
Pronunciation
Definition
Meaning and Definition
A dimensionless quantity representing the fraction of volume or space occupied by particles within a structure, most commonly in nuclear or materials science.
1. In nuclear physics: the difference between the actual isotopic mass and the mass number, divided by the mass number, indicating nuclear binding energy stability. 2. In materials/geometric packing: the proportion of space filled by identical objects (e.g., spheres) in a given arrangement.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences; the term is identical in both varieties.
Connotations
Purely technical, with no regional connotative variation.
Frequency
Extremely rare outside specialized physics, chemistry, or engineering texts in both regions.
Grammar
How to Use “packing fraction” in a Sentence
The packing fraction of [material/nucleus] is [value].A [high/low] packing fraction indicates [property].Calculate/determine the packing fraction for...Vocabulary
Collocations
Examples
Examples of “packing fraction” in a Sentence
verb
British English
- Not applicable as a verb.
American English
- Not applicable as a verb.
adverb
British English
- Not applicable as an adverb.
American English
- Not applicable as an adverb.
adjective
British English
- Not applicable as an adjective.
American English
- Not applicable as an adjective.
Usage
Meaning in Context
Business
Not used.
Academic
Exclusively used in physics, chemistry, materials science, and engineering research papers and textbooks.
Everyday
Never used.
Technical
The primary domain. Used to describe nuclear stability or the efficiency of geometric packing in materials/crystallography.
Vocabulary
Synonyms of “packing fraction”
Strong
Neutral
Weak
Vocabulary
Antonyms of “packing fraction”
Watch out
Common Mistakes When Using “packing fraction”
- Using it in non-technical contexts.
- Confusing it with simple 'density' (which is mass/volume, not a fraction of space occupied).
- Misspelling as 'package fraction'.
FAQ
Frequently Asked Questions
No. Density is mass per unit volume. Packing fraction is a dimensionless ratio of the volume occupied by particles to the total available volume.
Typically, no. It is a fraction of space filled, so it ranges from 0 to 1 (or 0% to 100%).
In nuclear physics, a negative packing fraction indicates the isotope's actual mass is less than its mass number, signifying high stability due to mass being converted to binding energy.
Almost exclusively in advanced textbooks, research papers, or university courses in physics, chemistry, materials engineering, or related STEM fields.
A dimensionless quantity representing the fraction of volume or space occupied by particles within a structure, most commonly in nuclear or materials science.
Packing fraction is usually technical/scientific in register.
Packing fraction: in British English it is pronounced /ˈpæk.ɪŋ ˌfræk.ʃən/, and in American English it is pronounced /ˈpæk.ɪŋ ˌfræk.ʃən/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. The term is exclusively technical.”
Learning
Memory Aids
Mnemonic
Imagine tightly PACKing oranges in a crate; the FRACTION of the crate's volume filled by oranges is the 'packing fraction'.
Conceptual Metaphor
SPACE IS A CONTAINER (The container's capacity is measured by how much of it is filled by objects).
Practice
Quiz
In which field is the term 'packing fraction' LEAST likely to be used?