Rss feeds, planet

I am looking around if a planet gathering rss feeds about crystallography or chemistry can be interesting. However, by looking at the websites of the software distributed here, none proposed rss feeds.

So, in the hypothesis I’ll set up a planet. Which feeds can I used? If you know any feeds that can be interesting, post it in a comment. If there is enough material, I’ll think about it.

PS: for those you don’t know what a planet is: in online media, Planet is a feed aggregator application designed to collect posts from the weblogs of members of an Internet community and display them on a single page. Here is an example: