[Tex/LaTex] Problem displaying degrees celsius with siunitx and xelatex

siunitxxetex

I'm trying to discuss a temperature in a document where I'm using xelatex and siunitx.

       The temperature was further increased to \SI{200}{\degreeCelsius}.

When using xelatex this causes a hollow box to appear in place of the unit. When using pdflatex and a distribution supplied font it works fine. Is there a solution to this that I have missed?

This is a link to a character guide for the font — ITC Baskerville Std Roman — I'm using.
http://store2.adobe.com/cfusion/store/html/index.cfm?store=OLS-UK&event=displayFont&code=BASQ10005000

I've also tried Times New Roman with no joy.

I'm using a fully updated texlive 2011.

Many thanks,

MWE

 \documentclass{article}

 \usepackage{fontspec}                              
 \setmainfont[Mapping=tex-text]{Times New Roman}
 %\usepackage{xkeyval}
 %\usepackage{polyglossia}                          
 %\setdefaultlanguage[variant=british]{english}             
 %\usepackage{etoolbox} 
 \usepackage{siunitx}

 \begin{document}
 The temperature was \SI{200}{\degreeCelsius}.
 \end{document}

enter image description here

Best Answer

Expanding on Joseph's answer, you can find a matching font that has the required symbol; for instance, if your Times New Roman hasn't the ℃ symbol, then you can do

\newfontfamily{\tgtermes}[Ligatures=TeX]{TeX Gyre Termes}

\usepackage{siunitx}

\usepackage{newunicodechar}
\newunicodechar{℃}{{\tgtermes ℃}}
\sisetup{text-celsius = ℃}

thereby using the different font only for the character you need. Alternatively, you can also try faking the symbol:

\sisetup{text-celsius = $^\circ\mkern-1mu$C}

(adjust the amount of kerning).

Related Solutions

[Tex/LaTex] Problem with siunitx and T1 fontenc

Adding \usepackage[T1]{fontenc} to your preamble is a good thing, but sadly it will load a bitmap font by default. To fix this, you should install the cm-super package or load a vector font (for example lmodern or libertine). Adding microtype will make the type face a little nicer.

No longer a minimum example, but here is how I would suggest to alter your document:

\documentclass[11pt,a4paper]{article}

\usepackage{siunitx}

\usepackage[utf8]{inputenc}
\usepackage[swedish]{babel}
\usepackage{lmodern}
\usepackage[T1]{fontenc}
\usepackage[babel=true]{microtype}

\begin{document}
\section{Example}
The power was \SI{150}{\watt} \\
The power was 150 W. \\
Björkö is close to Göteborg, kind of.
\end{document}

[Tex/LaTex] unknown problem in siunitx

I’d use the UTF characters here and not the \prime\prime (better would be siunitx’ default setting {}^{\prime\prime} which is '', anyway). That way, the glyphs are taken from the same font as the digits.

Code

\documentclass{article}
\usepackage{fontspec}
\usepackage{siunitx}
\setromanfont[Numbers=OldStyle]{Linux Libertine O}
\sisetup{
  detect-all = true,
  text-arcsecond=″,
  text-arcminute=′,
  math-arcsecond=″,
  math-arcminute=′,
}
\DeclareSIUnit[number-unit-product={}]\inchQ{\SIUnitSymbolArcsecond}
\DeclareSIUnit[number-unit-product={}]\footQ{\SIUnitSymbolArcminute}
\begin{document}
\begin{itemize}
  \item Arcseconds
  \begin{itemize}
    \item \SI{4 x 6}{\arcsecond}
    \item $\SI{4 x 6}{\arcsecond}$
  \end{itemize}
  \item Inches
  \begin{itemize}
    \item \SI{4 x 6}{\inchQ}
    \item $\SI{4 x 6}{\inchQ}$
  \end{itemize}
\end{itemize}
\end{document}

Output