copper.. obviously iron sulphur :)
They're crystal system is the same, in other words they're all cubic.
CuFeS2
i doubt this but i guess it is obtained by electroplating. but just check coz I'm not sure.
Copper oxide can be heated very strongly to make it decompose into Copper and Oxygen, but this procedure need high amount of heat. So, another efficient method used is, to react copper oxide with a...