hermann-mauguin symbol: meaning, definition, pronunciation and examples
C2Highly Technical
Quick answer
What does “hermann-mauguin symbol” mean?
A standard notation used in crystallography and mineralogy to represent the symmetry of a crystal structure, particularly the point group or space group.
Audio
Pronunciation
Definition
Meaning and Definition
A standard notation used in crystallography and mineralogy to represent the symmetry of a crystal structure, particularly the point group or space group.
A formal, alphanumeric symbol that concisely encodes the symmetry elements (like rotation axes, mirror planes, and inversion centers) present in a crystal. It is also known as the international symbol.
Dialectal Variation
British vs American Usage
Differences
No significant difference in usage. Both use the standard international scientific term.
Connotations
Purely technical, with no regional connotations.
Frequency
Equally rare and specialised in both dialects, confined to advanced scientific literature.
Grammar
How to Use “hermann-mauguin symbol” in a Sentence
The [crystal] has a Hermann-Mauguin symbol of [symbol].The Hermann-Mauguin symbol [encodes/indicates/represents] [symmetry].Vocabulary
Collocations
Examples
Examples of “hermann-mauguin symbol” in a Sentence
adjective
British English
- The Hermann-Mauguin notation system is standard.
- We need the Hermann-Mauguin classification.
American English
- The Hermann-Mauguin notation system is standard.
- Refer to the Hermann-Mauguin classification.
Usage
Meaning in Context
Business
Never used.
Academic
Exclusively used in advanced textbooks and research papers in crystallography, mineralogy, solid-state physics, and materials science.
Everyday
Never used.
Technical
The primary context. Used to describe and classify crystals unambiguously in research, databases (like the ICSD), and structural reports.
Vocabulary
Synonyms of “hermann-mauguin symbol”
Neutral
Weak
Vocabulary
Antonyms of “hermann-mauguin symbol”
Watch out
Common Mistakes When Using “hermann-mauguin symbol”
- Mispronouncing 'Mauguin' (should be approximately 'moh-ganh').
- Confusing it with the Schoenflies notation (e.g., 'C2v' vs. 'mm2').
- Using it as a plural ('Hermann-Mauguin symbols' is fine for multiple instances).
FAQ
Frequently Asked Questions
Carl Hermann (1898-1961) and Charles-Victor Mauguin (1878-1958) were crystallographers who developed this notation system in the 1930s.
No. The symbol for a space group is more complex, incorporating additional notations for translational symmetry elements (like glide planes and screw axes), whereas the point group symbol describes only the rotational and reflection symmetry.
You would only encounter it in highly specialised university courses, PhD theses, or research articles in fields like mineralogy, materials science, solid-state chemistry, or crystallography.
For the cubic crystal system, a common point group symbol is 'm-3m'. For a space group, an example is 'P6₃/mmc', which describes the symmetry of the hexagonal close-packed structure.
A standard notation used in crystallography and mineralogy to represent the symmetry of a crystal structure, particularly the point group or space group.
Hermann-mauguin symbol is usually highly technical in register.
Hermann-mauguin symbol: in British English it is pronounced /ˌhɜː.mən məʊˈɡæ̃ ˈsɪm.bəl/, and in American English it is pronounced /ˌhɝː.mən moʊˈɡæ̃ ˈsɪm.bəl/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Hermann and Mauguin made a **Symbol** for crystals, Sorting symmetry with numbers and letters, like riddles.
Conceptual Metaphor
A CRYSTAL'S SYMMETRY IS A CODE. The symbol is the cipher or formula that unlocks and describes the geometric pattern.
Practice
Quiz
What is a Hermann-Mauguin symbol primarily used to describe?