There isn't a specific phase for white or black magic. It just depends on what your wanting to do. There is a small reference on moon phases on this site.
Like say you want to bring good luck, or a new lover, bring someone health, love spells etc, bringing something good or bad... Waning (between new moon and full moon, so it's growing) then say you want to banish something, ie bad luck, bad energy, an illness, or break someone up, etc, you would want to do that on a waxing moon, or when it gets smaller. Some spells need a specific phase, even a specific planetary/sign phase. If you get the yearly witches datebook, it has all that: moon phase, planet your entering and time (some days more than one planet/sign) it's 11 here, but I think it's worth it. I use mine all the time when planning out a good time to cast a spell.
Hope this helps.