From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastien Vauban <sva-news-D0wtAvR13HarG/iDocfnWg@public.gmane.org>
Subject: Re: \nbsp trick to get prefixed superscript to work?
Date: Mon, 18 May 2015 21:18:53 +0200
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John Kitchin wrote:
> I think what Eric is referring to is:
>
> #+latex_header: \usepackage[version=3]{mhchem}
>
> @@latex:\ce{^{147}Pm}@@
>
> that exports for me.
>
> \nbsp{}^{147}Pm also seems to work, but might put an extra space in.
>
> you might prefer \phantom{}^{147}Pm

Or using the zero-width char (via the predefined entity \zwnj in Org)?

Best regards,
  Seb

-- 
Sebastien Vauban