I had the same problem when I tried to make some iron oxide. This is due to the fact that you've created a mixture of iron 2 and 3 oxide. Iron 2 oxide
is black and iron 3 oxide is red. Over several weeks, this powder should change into a nice red colour. If you want to speed things up, mix with some
tap water and blow air into it. I personally think it's not worth the trouble. |