Is it possible? To install an Arch package on Debian?
It's possible, although it's not a good idea to mix package management systems...
An Arch package is an
xz-compressed tarball containing the package's files and some meta-data, stored in
.MTREE. To extract a package, simply run
tar xf on it in a temporary directory; if you then decide you want to install the contents you can move them to
/ (but please make sure you're not overwriting anything...). The
.PKGINFO file will tell you what the dependencies are (
depend = lines), and the
.INSTALL file will tell you what post-installation tasks you should run, if any.
Unless you absolutely have to, I'd recommend avoiding this approach though; you'd be better off building the package from source if you can. Using binary Arch packages in this way means you're installing software without your distribution's package management system being aware of it, and you're relying on the libraries used being compatible across distributions.