[Tex/LaTex] siunitx: µ doesn’t work

Question

I'm using TeXnicCenter for Windows (7) and I'm a bloody beginner in everything that concerns LaTeX. I'm using the siunitx package for mathematical formulas and it works just fine… with one exception. The \micro (e.g. \si{\micro}) command doesn't work! It simply doesn't show the µ in the PDF file. I've tried to use \u as well without success. Does anybody know what the error could be?

Answer 1

I’ll throw this in here, as my search for a solution led me here, but my problem was another one.

Using XeTeX and Latin Modern, I found that the greek letter μ does not work. However, the Unicode micro sign μ does work.

Knowing that, I added \sisetup{math-micro=\text{µ},text-micro=µ}, and now all seems well.

To clarify, use

µ
MICRO SIGN
Unicode: U+00B5, UTF-8: C2 B5

and not

μ
GREEK SMALL LETTER MU
Unicode: U+03BC, UTF-8: CE BC

for great justice.

MWE for my setup (XeTeX on OS X):

\documentclass{standalone}
\usepackage{fontspec}
\usepackage{siunitx}
% Note that the sign must be
%  µ
%  MICRO SIGN
%  Unicode: U+00B5, UTF-8: C2 B5
% and \emph{not}
%  μ
%  GREEK SMALL LETTER MU
%  Unicode: U+03BC, UTF-8: CE BC
\sisetup{math-micro=\text{µ},text-micro=µ}

\begin{document}
Now you can \si\micro\ all the things.
\end{document}