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There was some discussion on the cobalt talk page about six years ago now regarding the IPA and respelling keys for this word. "Cobalt" is also mentioned in the current respelling help page as a word for which respelling is problematic. The OED IPA for the word reads thus: /ˈkəʊbɒlt/, which the ((IPAc-en)) template replaces with /ˈkoʊbɒlt/ (ain't it grand when the highly-specialized IPA comes up with two different spellings for the exact same pronunciation of the exact same word? Gotta love it!) which has the same first syllable as "cobra" and "coincidence". That clears up the first syllable (sort of) but still leaves us with "bolt". The OED indicates the "o" is is like the sound of "o" (more like "ah") in "body" and uses the character "ɒ". Other sources, however, (dictionary.com for one) use the character "ɔ" and suggest it is to be pronounced "aw" as in "awful". Merriam Webster says it is the sound indicated by their character "ȯ", making it rhyme with "pole vault" and "rock salt" and "asphalt" (their examples, not mine). The OED says asphalt is /ˈæsfælt/, /-fɔːlt/, neither of which is a phonetic match for the phonetic spelling they give for "cobalt". The word "halt" should rhyme with "cobalt", and the OED says it is transcribed /hɔːlt/, which does match one of the two versions they give for "asphalt". I am not an authority to supersede the OED, but while I think we should retain the OED's IPA, I think we should use a respelling of "KOH-balt" (alternatively, "KOH-bawlt") and not "KOH-bolt" as is the current situation. KDS4444 (talk) 08:49, 19 November 2016 (UTC)Reply[reply]
The problem is that while o in our pronunciation respelling key is supposed to always represent /ɒ/, the word bolt actually has the pronunciation /boʊlt/. Using a is wrong because that is supposed to mean /æ/ while aw means /ɔː/. So while what you currently write may be more intuitive, it goes against the key provided for the respelling scheme. Double sharp (talk) 11:48, 19 November 2016 (UTC)Reply[reply]
Damn it, and I had thought I had been so thorough. But one thing I did not check was the value of the current respelling character "a". What about "ah"? This signifies IPA "/ɑː/", which is still not the undesirable sound "aw" (/ɔː/) but still seems very close to what we need here. Would this work, do you think? "KOH-bahlt"? KDS4444 (talk) 23:45, 19 November 2016 (UTC)Reply[reply]
I daresay most of our readers would read that exactly as /ɑː/, which does not sound at all like the /ɒ/ we need to me (maybe the degree of difference differs between dialects, but I'd hate to give anyone the wrong impression of pronunciation). Double sharp (talk) 04:17, 20 November 2016 (UTC)Reply[reply]
Let me get this right: the sounds /ɑː/ and /ɒ/ sound... "not at all" alike to you? "father and pod don't seem phonetically similar to your ears? Because the IPA help page for English notes that these two sounds are not distinguished in the GenAm (general American) dialect (which is what I speak, and so let us clarify— what dialect do YOU use?). Following that, how does the respelling "KOH-bahlt" read/ sound to you? Because it sounds fine to me, and much better than "KOH-bolt" ever did. KDS4444 (talk) 13:44, 22 November 2016 (UTC)Reply[reply]
I use RP, where these two vowels have not merged. I'm really not sure how to describe it to you if your dialect doesn't distinguish them, but it really doesn't sound right to me. Double sharp (talk) 14:24, 22 November 2016 (UTC)Reply[reply]
re Double sharp[1] and [2]. Please stop lamenting over ((Respell)) just because there are multiple pronunciations. As the older talk (above) points out, also by IPA. IPA nor Respell is the cause of this. When there are the astonishing number of two pronunciations (what is RP, btw?), just mention two as we do here. -DePiep (talk) 13:14, 2 November 2017 (UTC)Reply[reply]
I don't think you get it, because the problem is not "multiple pronunciations". IPA is perfectly fine here alone; it's the respell that causes the problems.
The problem with ((Respell)) is simple: in RP (standard British English pronunciation) the second syllable of cobalt has the vowel /ɒ/, the vowel of lot. This in pronunciation respelling is spelt o. But that makes the second syllable respelt bolt, which gives the wrong impression because bolt is an English word that is not pronounced with the vowel /ɒ/.
In General American, because the vowels /ɒ/ and /ɑː/ (the palm vowel) have merged (the father–bother merger), the second syllable has the vowel /ɑː/, but we do not transcribe it differently: our IPA key makes every possible phonetic distinction in Standard English, and you are supposed to just ignore the distinctions your dialect does not have. This vowel is respelt ah in pronunciation respelling. Which works fine for Americans, but because the vowels are different in British English, it sounds wrong to those using British English like me, whereas if we used /ɒ/ both of us would read the IPA properly. But the British pronunciation cannot be represented in the respell key without creating the collision with the word bolt. Double sharp (talk) 13:47, 2 November 2017 (UTC)Reply[reply]
Semi-protected edit request for "Main Isotopes of Cobalt"[edit]
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Half-life of Co-57 should be changes from 271.79d to 271.74d. The correct value (271.74d) is reported on the Isotopes_of_cobalt page or for example here. Valentyn235 (talk) 12:44, 6 August 2021 (UTC)Reply[reply]
Done ScottishFinnishRadish (talk) 15:04, 6 August 2021 (UTC)