Hello Khadga,
I think you have to be in text mode. But you can enter text mode _inside_
math mode by typing A-$. There are at least two ways of entering the angstrom
symbol.
1. \AA
2. A-O A
begin:vcard fn:Khadga Karki n:Karki;Khadga org:Max Planck Institute of Quantum Optics adr:;;Hans-Kopfermann-Strasse 1;Garching;Munich;D-85748;Germany email;internet:address@hidden version:2.1 end:vcard
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