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%                                                       Packages
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% Do not add any other packages without consulting with Dr. Breitenbucher as they may break the functionality of the class.
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% chem packages
\usepackage[version=4]{mhchem}
%\usepackage{chemformula}
\usepackage{animate}


%language packages
% \usepackage[OT1]{fontenc}%Original text encoding scheme used by TeX
% \usepackage[T1]{fontenc}% T1 for most European languages
% \usepackage[T2A]{fontenc}% T2A for Cyrillic font encoding

% % %%%%% section to define the Slavic letter L'
%  \usepackage[utf8]{inputenc}

%  \DeclareTextSymbolDefault{\softL}{T1}
%  \DeclareTextCommand{\softL}{T1}{\v{L}}
%  \DeclareUnicodeCharacter{013D}{\softL}
% % %%%%%%%%%%%

\usepackage[french,german,russian,english]{babel}
%language packages

% --- Font definitions if you are using XeLaTeX engine instead of PDFLaTeX engine ---
\ifxetex%
	\defaultfontfeatures{Ligatures=TeX,Mapping=tex-text,Renderer=ICU} %
		\setmainfont[Numbers=OldStyle]{Times New Roman} % default Times New Roman, other choices for the main font would be Libertinus Serif, TeX Gyre Pagella. XITS, STIX Two Text, Fira Sans Book, Cambria, Latin Modern Roman
		\setmathfont{TeX Gyre Termes Math} % default TeX Gyre Termes Math, other choices for the math font would be Libertinus Math, TeX Gyre Pagella Math, XITS Math, STIX Two Math, Fira Math, Cambria Math (Windows), Latin Modern Math
		\setsansfont[Scale=.87,Fractions=On,Numbers=Lining]{Arial}% default Arial, other choices for the sans serif font would be Skia, Arial, Helvetica, Helvetica Neue, Libertinus Sans, TeX Gyre Heros, Source Sans Pro, Fira Sans, Calibri, Latin Modern Sans
		\setmonofont[Scale=.9]{Courier New} % default Courier New, other choices for the mono font would be Libertinus Mono, TeX Gyre Cursor, Source Code Pro, Fira Mono, Consolas, Latin Modern Mono
\fi