31. "' Rhenium pentachloride "'is an inorganic compound of chlorine and rhenium . 32. This compound was first prepared in 1933, a few years after the discovery of rhenium . 33. The coordination number of 9 in this complex is the highest known for any rhenium complex. 34. "' Rhenium heptafluoride "'is the compound with the formula ReF 7. 35. These elements are vanadium, rubidium, indium, lanthanum, europium, rhenium and lutetium. 36. Rhenium and tungsten hexafluorides are used for chemical vapor deposition of thin metal films onto semiconductors.37. However, recent analysis indicated the presence of rhenium ( element 75 ), not element 113. 38. Refractory elements such as rhenium and ruthenium can be added to the alloy to improve creep strength. 39. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. 40. A discredited rhenium sulfide known as " zappinite " does not appear to be valid.
