I have this document:
\documentclass{article}
\usepackage[OT1]{fontenc}
\usepackage{libertine}
%\UndeclareTextCommand{\l}{OT1}
%\DeclareTextSymbolDefault{\l}{T1}
%\UndeclareTextCommand{\AA}{OT1}
%\DeclareTextSymbolDefault{\AA}{T1}
%\let\oldAA\AA
%\renewcommand{\AA}{\begingroup\fontencoding{T1}\selectfont\oldAA\endgroup}
\usepackage{amsmath}
\usepackage{siunitx}
%\DeclareSIUnit{\angstrom}{\AA}
\begin{document}
This is Quantifiably Efficiently Ligatured Text.
\AA
\si{\angstrom}
\l
\capitalring{A}
\end{document}
As you can see, the ł
character is misprinted. I got that sorted out in this question, which is the first two commented lines, taking that specific symbol from the T1 encoding. I'm having similar issues with the Å
symbol through the siunitx
package. This checks for the default encoding and selects either \AA
or \capitalring{A}
:
\str_if_eq:VnT \encodingdefault { OT1 }
{
\__siunitx_option_unchanged:Nnn \l__siunitx_angstrom_math_tl
{ \text { \AA } }
{ \text { \capitalring { A } } }
\__siunitx_option_unchanged:Nnn \l__siunitx_angstrom_text_tl
{ \AA }
{ \capitalring { A } }
}
Hence, the MWE above checking these commands. Problem is, I can't get the symbol to show properly through siunitx. The second pair of commented lines follows the fix I got from the ł
issue. But that just freezes the LaTeX compiler. The third pair of commented lines fix the \AA
command, but I can't seem to make siunitx
use it (final commented line).
Is there any way for the siunitx
package to use the T1 encoded \AA
(which is exacltly what I need)?
Note that I need OT1
encoding for cool ligatures (especially the Qu
) displayed in the first sentence,a nd they disappear if I don't use OT1.
Best Answer
The command
\AA
is not encoding specific and this is the reason for the error: its definition is\r{A}
. Unfortunately, the ring accent macro in OT1 encoding doesn't work well with the Libertine font, so you can adopt an ad hoc definition:I'm afraid that
\AA
will not work in other font shapes (italic, especially). If you just use it for the angstrom unit (which you shouldn't, by the way), it's good.