I would like to use a symbol in a chemical reaction equation which represents a solid's surface.

A common symbol used for this purpose is '>' or the \equiv symbol, but what I would like is actually something like the \equiv symbol but with the length of em-dash (basically like 3 em-dashes stacked on-top of one another).

Ultimately though, I would actually like a symbol with 5 lines on-top of each other, the height of a normal capitalized character.

Do you guys know of any such symbol that may exist? Or, is it possible to 'build' something like this?

  • It can be done putting an = symbol on top of the equiv symbol, but it would be slightly higher than a capital letter.
    – Bernard
    Sep 21 '19 at 22:58
  • 3
    There are specific packages for that, see e.g. tex.stackexchange.com/a/260839. Example: \documentclass{article} \usepackage{chemformula} \NewChemBond{quindruple}{ \foreach \i in {-.3em,-0.15em,.0em,.15em,0.3em}{ \draw[chembond] ([yshift=\i]chemformula-bond-start) -- ([yshift=\i]chemformula-bond-end) ; } } \begin{document} \ch{Ct\bond{quindruple}Ct} \end{document}
    – user194703
    Sep 22 '19 at 0:29

Here's a chemformula solution:



  \foreach \i in {-.7ex,-.35ex,0ex,.35ex,.7ex}{
      ([yshift=\i]chemformula-bond-start) -- ([yshift=\i]chemformula-bond-end) ;




\ch{A-B + A=B + A+B + A|B}


enter image description here


Is this close to what you want?

\usepackage{amsmath, amssymb}



\[\mathrm{N}\mybond \text{---}\]%


enter image description here

  • Yes, thanks Bernard and Schrödinger's cat, that's exactly it. Nice answers guys!
    – Adrian
    Sep 22 '19 at 7:45

Thanks for all the great leads guys. I liked @unbonpetit's response with the long lines (admittedly longer than em-dash like I initially wanted), so I decided to modify the code a bit and got a really nice result:


What's nice is you can play around with the positioning and I was able to get it slightly (vertically) off-center so that it lies closer to the baseline. Anyway, here is the code:

        {\foreach\i in{1.5,0.5,-0.5,-1.5,-2.5}{%

You don't even have to rename the ("fourbond...", etc.) definitions of course, but I just did it for completeness.

I did a similar one for a triple bond too. Thanks again for all the great answers everyone!

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.