This is what I think it is:
1. You get 500xp per win in Clan v Clan
2. 50xp per win , per member while playing with other clanmates in public matches.
3. Double this if you have double clan xp active.
4. It think you also get some for losing, not sure how much though.
This is from refreshing after each win.
50 Clan XP per Member per Win. 10 Clan XP per Member per Loss. Not sure about Clan vs. Clan or Clan Wars yet.
I think it's 500 Clan XP for winning Clan vs. Clan matches. We only lost one so far and I think we got 250 Clan XP for the loss, not sure yet. Will double check tomorrow when we get together for some more games.