Org-mode \ang from siunitx is overruled by the \angle symbol on pdf export

Question

I'm trying to use the package siunitx to format my scientific notations/values more nicely, but I can't get one thing to work, possibly due to my pdf-process.

I type in my orgfile something like this: \ang{95;13;14}N.

Expecting it to output: 95°13'14". In stead it outputs ∠{95;13;14}N.

I #+INCLUDE: this file with my LaTeX settings:

# page setup
#+LaTeX_CLASS: article
#+LaTeX_CLASS_OPTIONS: [a4paper] 
#+LaTeX_CLASS_OPTIONS: [12pt] 
#+LaTeX_CLASS_OPTIONS: [twoside] 

# placement of TOC anywhere
#+LaTeX_HEADER: \usepackage{titletoc}

# mathtools
#+LaTeX_HEADER: \usepackage{mathtools}

# fix margin
#+LaTeX_HEADER: \usepackage[innermargin=1.5in,outermargin=1.25in,vmargin=1.25in]{geometry}

# citation style
#+LaTeX_HEADER: \usepackage[authordate,bibencoding=utf8,strict,backend=biber,url=false,natbib]{biblatex-chicago}
# (internal) links
#+LaTeX_HEADER: \hypersetup{colorlinks=true,citecolor=blue,linkcolor=blue,citebordercolor={0 1 0},linktocpage,pdfstartview=FitH,anchorcolor=blue,filecolor=blue,menucolor=blue,urlcolor=blue}
# don't forget to #+LATEX_HEADER: \addbibresource

# chemical formulae
#+LaTeX_HEADER: \usepackage[version=4]{mhchem}

# SI units simplified
#+LaTeX_HEADER: \usepackage{siunitx}

And I use this line for my latex-pdf process in my init file:

(setq org-latex-pdf-process
     '("latexmk -pdflatex='pdflatex -interaction nonstopmode' -pdf -bibtex -f %f"))

Any ideas how to resolve this?

EDIT

I've opened up the exported .tex file and there I can see the problem: org mode has exported \(\angle\)\{65;;\}N, so it seems like emacs is extending \ang into \angle. If I manually edit the tex file and export it works correctly. Any idea how to stop it from doing this?

Answer 1

Disable entities. Or if you want to keep using entities remove the "ang" entry.

(with-eval-after-load 'org-entities
  (setq org-entities
        (cl-remove-if (lambda (x) (and (listp x) (equal (car x) "ang"))) org-entities)))

Answer 2

I simply had to make sure to add math delimiters as described in @LaTeX{} fragments.

\(\ang{45;23;23}\)N