(color online) Anisotropic electrical conductivities of dry K-feldspar single crystal at 2.0 GPa in the present study compared with previous results. The lines are labeled as follows: black solid lines represent the results of this work; dark blue dashed and dotted lines represent electrical conductivities of the [010] and [001] orientations of RK alkali feldspar with its chemical composition (K_0.71Na_0.26AlSi₃O₈) from El Maanaoui et al.;^[34] pink dashed and dotted lines represent electrical conductivities of the [010] and [001] orientations of VF alkali feldspar with its chemical composition (K Na_0.15AlSi₃O₈) at atmospheric pressure from El Maanaoui et al.;^[34] blue short dashed line represents the electrical conductivity of hot-pressed sintered polycrystalline K-feldspar aggregates at 2.0 GPa from Hu et al.;^[30] two purple dashed lines represent electrical conductivities of the microcline–orthoclase phase transition (with a minor albite content) at room pressure from Guseinov and Gargatsev;^[26] red dashed line represents the electrical conductivity of adularia single crystal (Or₈₄Ab₁₆) at atmospheric pressure from Maury;^[23] green dashed line represents the electrical conductivity of alkali feldspar (Or₆₁Ab₃₄An₅) at atmospheric pressure from Mizutani and Kanamori.^[22]