Math & Science ⇒ Looking for a special "double-i" symbol

[Cham]

I'm looking for a proper symbol to represent the matrix realisation of the imaginary unit. Currently, I'm using \mathds{I}, but I don't like it.

Is there a lowercase "double-i" symbol in LaTeX ? What would you suggest ?

[Cham]

How can we use Unicode and UTF-8 symbols in the math environment ?

The symbol I may be looking is the "double-i" from Mathematica : ⅈ.

Is there a LaTeX command for this one ?

[Johannes_B]

Code: Select all

%Compile with lualatex
\documentclass{standalone}
\usepackage{fontspec}
\usepackage{libertine}
\usepackage{unicode-math}
\begin{document}
\begin{tabular}{c}
\setmathfont{xits-math.otf}
$ ⅈ$ \\
\setmathfont{Asana-Math.otf}
$ ⅈ$
\end{tabular}
\end{document}

When talking of unicode, you have to mention XeLaTeX and LuaLaTeX. All you need is a font that actually provides the glyph.