A vane for an impeller of an agitator for mixing or agitating a process fluid is proposed comprising a socket (2) for mounting the vane (1) to an impeller (50) and a blade (3) for mixing or agitating the process fluid, the blade (3) being connected to the socket (2), the blade (3) having a leading edge (31), a trailing edge (32), and a blade tip (33) extending from the leading edge (31) to the trailing edge (32) at the end of the blade (3) facing away from the socket (2), and the blade (3) having a height (H) and a width (W), wherein the height (H) is the maximum distance of the blade tip (33) from the socket (2) and wherein the width (W) is the distance of the leading edge (31) from the trailing edge (32), wherein the blade (3) has a maximum width (WM) that is at least 55 percent, preferably at least 65 percent of the height (H). In addition, an impeller comprising such a vane as well as an agitator is proposed.