Phoenix feather wand cores

[Lisa]

No: HPFGUIDX 23103

Hello!  I am new to the group so excuse me if this has been already 
been addressed.  I was wondering about the significance of the phoenix 
feather in Voldemort's wand.  The phoenix is obviously a symbol of 
goodness, and closely associated with Dumbledore.  There's clearly a 
bond between Harry, Dumbledore, and the phoenix.  How is it that evil 
Voldemort has the feather from the same phoenix in his wand?