Text this: Superconductivity and Fermi Surface Studies of <i>β</i><sup>″</sup>-(BEDT-TTF)<sub>2</sub>[(H<sub>2</sub>O)(NH<sub>4</sub>)<sub>2</sub>Cr(C<sub>2</sub>O<sub>4</sub>)<sub>3</sub>]·18-Crown-6