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Quote: "rsirian1"Agree. However, there are more than just one "copper-nickel" to replace. There are at least 5 other ways used to describe the alloy:The text in brackets is a separate field to add extra details. It would be nice to have consistency there too, particularly as to whether we use % or permil. I must admit that I didn't check the US mint site until now. It looks like SCWC is the exception.
Copper-nickel (Copper (.75) + Nickel (.25))
Copper-nickel (Copper 75%, Nickel 25%)
Copper-nickel (Cu750 Ni250)
Copper-nickel (75% copper, 25% nickel; non-magnetic)
Copper-nickel (75% Copper, 25% Nickel)
It would be nice to just clean this up into one material listing.
Also, the US Mint does not use "copper-nickel" to describe the material for these coins. It uses "25% Nickel, Balance Copper".

Quote: "Idolenz"I think the word copper is far better understood then the term cupro- ... so I am against a change.I take your point but, speaking as a chemist, many elements have a different form when used at the begining of compounds or alloys. Copper doesn't always change to cupro but this isn't the only example (the OED includes cuprammonium). Also, it isn't change. As rsirian1 and I have shown, copper-nickel is only used in SCWC. Everywhere else uses cupro-nickel.
Change just for the sake of it doesn't serve anyone.

Quote: "rsirian1"I also found this deeper into the US Mint web site where it was describing the nickel:I can agree with the term cupro-nickel (reluctantly), but the mint website is wrong about the composition being 25% Ni, balance Cu.
Quote: "Newtony" but the mint website is wrong about the composition being 25% Ni, balance Cu.It is common, and standard in material specifications, to refer to the major alloying element as the"balance" while percentages for the minor elements are used. If percentages are given for all the elements then yes, order from most to least is the common way. Regardless of if you prefer "75% Cu, balance Ni" or "25% Ni, balance Cu" they are both unambiguous in meaning and doesn't throw into question the Mint's use of the term cupro-nickel.
It should say 75% Cu, balance Ni.
Quote: "ceh2019"As I understand it, Numista has a preference for British English over American English.I think we should firstly try to stick to simple, accessible vocabulary, common for all local varieties of English, not just British and American. Only if not possible, then British, yes.
Quote: "ceh2019" in other words, the OED does not recognise the use of "copper-nickel" to mean the alloy.OED does not list all possible combinations of metals to define them as an alloy of those metals. You won't find "nickel-zinc" in OED. Obviously, this does not mean that "nickel-zinc" is not "recognised" in Britain. Of course it is! We are just putting a hyphen between two nouns. Same for copper-nickel.
Quote: "Idolenz"I also have a background in chemistry and I have no problem understanding it I just want to minimize confusion for normal people.I object to the insinuation that chemists aren't normal people! More seriously, I doubt there is a single person with even a vague knowledge of coins or metals that could fail to understand what cupro-nickel means. Sadly, too many people have become accustomed to the term "copper-nickel" solely due to its use in SCWC (thus explaining the small advantage copper-nickel has in the n-gram). No-one else uses it. As far as I can tell, Krause and Mishler invented it. Until today, I assumed it was the American English term but, as rsirian1 has demonstrated, it isn't even that.
Quote: "BCNumismatics"The term 'Cupro' is actually derived from both Greek & Latin for 'Copper'.Honestly cu-ni is easier and you don't need to fight about it at all
The Greek word for 'Copper' is where the name 'Cyprus' comes from - as copper was commonly mined there in the ancient period.
I always use the term 'Cupro-Nickel'.
Aidan.
Quote: "Sjoelund"Honestly cu-ni is easier and you don't need to fight about it at allWe'd probably still argue about how to pronounce it!
Quote: "ceh2019"No, you would just see it written
Quote: "Sjoelund"Honestly cu-ni is easier and you don't need to fight about it at allWe'd probably still argue about how to pronounce it!
I am happy to see that Numista prefers English rather than American(ised) pseudo English.
I came across this page via Google AI, which dubiously states:
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Both cupronickel and cupro-nickel are correct and commonly used to describe the same copper-nickel alloy. "Cupronickel" is often found in technical or dictionary contexts, while "cupro-nickel" is frequently used in numismatics (coin collecting) and the industry to denote the, usually 75/25, mix of copper and nickel.
Usage: They are interchangeable in most contexts, including describing marine-grade alloy or silver-colored coinage.
Alternative Term: Both are frequently referred to as copper-nickel.
Composition: Generally, it refers to an alloy with copper and 5–30% nickel.
According to Wikipedia, "cupronickel" (or copper–nickel) is a durable alloy resistant to corrosion. While The Royal Mint typically uses "cupro-nickel," it is a matter of style rather than correctness.
In summary, neither is "wrong," but "cupronickel" (one word) is a more common dictionary spelling, whereas "cupro-nickel" (hyphenated) is often used to emphasize the two components, notes this Numista forum discussion.
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My strong preference is for the earlier, and more logical and scientific hyphenated version cupro-nickel.
BTW: Although Cu-Ni is a convenient and concise abbreviation, it is not as clear as using the entire word. Besides, I find that if I find myself trying to use the abbreviated form, then predictive text takes over after the third letter!
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Why bring AI into this?
Lawrence Chard
BTW: Although Cu-Ni is a convenient and concise abbreviation, it is not as clear as using the entire word. Besides, I find that if I find myself trying to use the abbreviated form, then predictive text takes over after the third letter!
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Also Cu-Ni (or CuNi) aren't in the approved list of abbreviations. For the reason you mentioned – it isn't as clear, especially for people who don't speak English or French well.
What I don't understand as elemental symbols are some of the few things that are universally the same in every modern language and script.

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