http://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Venuspioneeruv.jpg/220px-Venuspioneeruv.jpg
The Composition of Venus includes nickel-iron, silicates and a carbon dioxide atmosphere.
The Elements on Venus include; Carbon dioxide (95%), nitrogen, sulfuric acid, and traces of other elements. It's compunds are found to be Hydrogen due to the escape of hydrogen from it's atmosphere. It's Alloy's include Carbon and stainless steel.
The water was made up of hydrogen and oxygen and when it dried up it turned into the solvant: carbon dioxide.
http;//www.solstation.com/stars/wenus.htm
The temperature of Venus and it's pressure makes it where the phase distinction between a liquid and a solid dissapears.
http://halliwell.edublogs.org/files/2007/10/venus_interior.jpg
http://www.zoomschool.com/vgifs/Venusinside.GIF