NEt4OH•5H2O containing hydroxide-water layers

In the title compound, tetraethylammonium hydroxide pentahydrate, C8H20N+. OH-. 5H(2)O, layers of approximately hexagonally close-packed NEt4+ cations and anionic layers of hydroxide and water molecules are stacked alternately along the b axis. All hydroxide and water H atoms are in ordered positions, giving rise to a network of hydrogen bonds [O ... O 2.633 (1)-2.947 (2) Angstrom] with four- and six-membered rings. The hydroxide ion accepts four hydrogen bonds from four water molecules but does not act as a proton donor.