The experimental and theoretical study was dealing with dielectric properties of water molecules trapped in beryl crystals. Its crystal lattice provides nanoscopic regularly arranged sites where the trapped molecules can rotate. Unlike in liquid water, no hydrogen bonds are formed, but the molecules are interacting by their dipole moments. It has been proved that the molecules consequently tend to point in the same direction which implies producing a local electric field. Such an alignment could thus exist also in other substances and play a role in some processes involving water.