Electromagnetic excitation of aligned<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>7</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>nuclei

Electric ground-state properties of $^{7}\mathrm{Li}$ have been measured in a consistent way by observation of the Coulomb interaction of aligned $^{7}\mathrm{Li}$ ions with heavy target nuclei. Besides the quadrupole moment (${Q}_{s}$=-3.70\ifmmode\pm\else\textpm\fi{}0.08 ${e}^{2}$ ${\mathrm{fm}}^{2}$) and the B(E2,${(3/2)}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}${(1/2)}^{\mathrm{\ensuremath{-}}}$) value (8.3\ifmmode\pm\else\textpm\fi{}0.5 ${e}^{2}$ ${\mathrm{fm}}^{4}$), the tensor moments of the nuclear polarizability ${\ensuremath{\tau}}_{12}$ and ${\ensuremath{\tau}}_{11}$ were determined (${\ensuremath{\tau}}_{12}$=${\ensuremath{\tau}}_{11}$=0.23\ifmmode\pm\else\textpm\fi{}0.06 ${\mathrm{fm}}^{3}$). Present theoretical investigations on the structure of $^{7}\mathrm{Li}$ reveal difficulties in providing a unified description of all four properties.