Talk:Electron affinity (data page)
|WikiProject Elements||(Rated List-class, Low-importance)|
|WikiProject Chemistry||(Rated List-class, Low-importance)|
The information for gallium is wrong. It should be 28.9 not 42.5
The information for Silicon doesn't look right. Several sources online say the electron affinity should be 4.05 eV for Silicon. See, for instance, this document published by the silicon wafer manufacturer Virginia Semiconductor: http://www.virginiasemi.com/pdf/generalpropertiessi62002.pdf. The textbook "Semiconductor Device Fundamentals" by Robert F. Pierret lists the electron affinity of Silicon at 4.03 eV on page 478.
- Gallium appears to be 41 kJ/mol ... The electron affinity of Si was measured by photodetachment microscopy (an atomic physics technique) in 2010 and found to be 1.389 5210(7) eV, see  (Chaibi et al.). That settles the case. It would have been extremely suprising anyway to find an electron affinity greater than those of the halogens. Both tables - in eV and in kJ/mol - actually need to be revised and merged together. Having separate tables is nonsense when one deals with one and the same quantity. I shall do this merging, keeping one column in eV and another one in kJ/mol, so as to make everybody happy, ASAP. Good night Chrisanion (talk) 21:19, 28 May 2015 (UTC)
- The commenters' 4.05 eV values were not for the chemical electron affinity of Si but rather the surface electron affinity of an Si crystal as defined in solid state physics. Unfortunately these two concepts are both called "electron affinity" despite having completely different values. See the electron affinity article. I recall some talk on another talk page (I can't find it at the moment) that it might be also nice to tabulate the latter, however it's not clear that this is so useful since surface electron affinities depend on temperature, crystal face, etc. etc. and so only two significant figures are woth listing (just like work functions).
- At the least it might be worth putting a note on the data page that the solid state electron affinities are not at all listed.
- Thanks for volunteering to merge the tables! That was bugging me for a long time and the page will be much improved for your efforts. --Nanite (talk) 08:06, 29 May 2015 (UTC)
The comment(s) below were originally left at several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section., and are posted here for posterity. Following
|Very useful, especially when one does not have a handbook of physical/chemical constants to hand. The only improvements I could suggest are:
a) the citations should be hypertext b) it should be expanded to cover more molecules (the reward for good work is a request for more of it)HLHJ (talk) 21:03, 31 May 2008 (UTC)
Last edited at 21:03, 31 May 2008 (UTC). Substituted at 14:18, 29 April 2016 (UTC)