felspar
Very LowTechnical / Geological (somewhat archaic)
Definition
Meaning
A crystalline mineral, a type of rock-forming tectosilicate, composed of aluminum silicates combined with potassium, sodium, or calcium.
A common mineral found in igneous and metamorphic rocks, historically the main source of potash for industry and an important component in the manufacture of ceramics and glass.
Linguistics
Semantic Notes
The term 'felspar' is a historical variant spelling of the modern standard term 'feldspar'. It is considered archaic in professional geology but may still be encountered in older texts and regional usage. The spelling reflects an earlier folk etymology associating the mineral with 'field' and German 'Feld'.
Dialectal Variation
British vs American Usage
Differences
Both variants are archaic and rare. 'Feldspar' (with 'd') is the modern standard in both regions. 'Felspar' has slightly more historical persistence in older British texts, while American usage standardised on 'feldspar' earlier.
Connotations
'Felspar' connotes older, possibly 19th-century, scientific or literary texts. It may be perceived as outdated or a spelling error in modern technical contexts.
Frequency
Exceedingly rare in contemporary usage. In modern corpora, 'feldspar' vastly outnumbers 'felspar' by over 1000:1.
Vocabulary
Collocations
Grammar
Valency Patterns
[Noun] is rich in felspar.The [rock type] contained large amounts of felspar.Felspar decomposes into [clay mineral].Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Virtually never used. Would be replaced by 'feldspar' in mining or ceramic industry reports.
Academic
Only found in historical geological literature or quotations. Modern academic texts use 'feldspar' exclusively.
Everyday
Extremely unlikely to be encountered.
Technical
Archaic. The modern standard 'feldspar' is used in geology, mineralogy, and materials science.
Examples
By Part of Speech
adjective
British English
- The felspar crystals were clearly visible.
- A felspar-rich granite was identified.
American English
- The felspathic matrix (derived adjective) was analysed.
Examples
By CEFR Level
- The old geology book referred to a mineral called 'felspar', which we now spell 'feldspar'.
- In his 1858 treatise, Lyell described the granite as comprising chiefly quartz and felspar, the latter term now considered an archaic variant of feldspar.
Learning
Memory Aids
Mnemonic
Think: The OLD spelling for this mineral has lost its 'D' from the field.
Conceptual Metaphor
N/A for this highly technical, archaic term.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'слюда' (mica) or 'кварц' (quartz). The correct Russian equivalent is 'полевой шпат' (polevoy shpat). 'Felspar' is just an old English spelling for the same mineral group.
Common Mistakes
- Using 'felspar' in a modern scientific paper (should be 'feldspar').
- Misspelling as 'feltspar' or 'felsparr'.
- Confusing it with 'spar' as a general term for non-opaque minerals.
Practice
Quiz
What is the primary reason 'felspar' is rarely used today?
FAQ
Frequently Asked Questions
It is a historically attested variant spelling of 'feldspar', but it is considered archaic and incorrect in modern technical English.
Always use 'feldspar'. 'Felspar' will be seen as a mistake or a sign of using outdated sources.
It originates from a partial Anglicisation of the Swedish term 'fältspat' (field spar), where 'fält' (field) was associated with the German 'Feld'. The 'd' was dropped in this variant, influenced by the English word 'spar' (a type of mineral).
Major modern dictionaries may list it only as a variant or archaic form of 'feldspar', if at all. It is not the main entry.