Iranian Oil Minister Kazem Vaziri-Hamaneh is scheduled to leave for Turkey on Tuesday, leading a top oil delegation. Expansion of bilateral relations between the two countries, export of Iran\'s natural gas to Turkey and the transfer of Iran\'s natural gas to Europe via Turkish territory are among the main topics expected to be discussed during the visit. Iran has earlier conducted preliminary negotiations with Turkey over its gas export to Austria through that country. However, the natural gas prices, the volume of the gas to be exported plus a host of other issues like the disruption in the flow of gas have always been the cause of disagreement between the two neighboring nations. Moreover, the building of the Nabucco natural gas pipeline is another bone of contention in the relations between the two nations. Turkey is against Iran’s joining of the $5.8b project. The pipeline, due to be built in 2008, is to run from central Asia to Austria. It will go through Turkey, Bulgaria, Romania, Hungary and Austria. (IranMania)