Hexane-1,6-di­ammonium hexa­fluoro­silicate

The asymmetric unit of the title organic–inorganic molecular salt, C₆H₁₈N₂²⁺·SiF₆²⁻, consists of one anion and one cation together with half of each of two cations and two anions located on inversion centres. The SiF₆²⁻ octa­hedral anions are arranged to form sheets parallel to (011), which are linked into a three-dimensional network by the organic cations through N—H...F hydrogen bonds.

Butane-1,4-di­ammonium hexa­fluoro­silicate

The title compound, [NH₃(CH₂)₄NH₃]²⁺·SiF₆²⁻, is a hybrid built from an organic butane-1,4-di­ammonium dication linked to a hexa­fluoro­silicate mineral anion. Both ions posses inversion symmetry. In the anion the Si atom is located on an inversion center, while in the cation the center of inversion is situated at the mid-point of the central —CH₂—CH₂— bond. The Si atom is surrounded by six F atoms, forming a slightly distorted SiF₆²⁻ octa­hedron. These octa­hedra are linked to the organic cations through N—H...F hydrogen bonds, forming a three-dimensional network.