You might want to review these links:
http://oca.org/questions/romancatholicism/communion-in-roman-catholic-church
http://oca.org/questions/divineliturgy/receiving-communion
So the answer is ‘no’ a Catholic cannot receive Orthodox communion.
I’m happy if you are seeking a true church amongst the Orthodox churches. I wish you well on that journey toward reconciliation.
I wonder about Mormons...