Calcium disodium hexa-thio-diphosphate(IV) octa-hydrate

Area of Science:

• Inorganic Chemistry
• Crystallography
• Materials Science

Background:

• The synthesis and structural characterization of novel inorganic compounds are crucial for understanding chemical bonding and developing new materials.
• Layered inorganic structures often exhibit unique physical and chemical properties.

Purpose of the Study:

• To synthesize single crystals of the title compound, CaNa(2)(P(2)S(6))·8H(2)O.
• To determine the crystal structure of CaNa(2)(P(2)S(6))·8H(2)O and describe its structural features.
• To investigate the coordination environment of cations and the connectivity of anions and water molecules.

Main Methods:

• Single crystal growth via precipitation from aqueous solution.
• Single crystal X-ray diffraction for structural determination.
• Analysis of coordination polyhedra and hydrogen bonding interactions.

Main Results:

• Single crystals of CaNa(2)(P(2)S(6))·8H(2)O were successfully synthesized.
• The crystal structure is isotypic with the strontium analogue, featuring Ca(2+), Na(+), (P(2)S(6))(4-) anions, and water molecules.
• The structure is built from layers parallel to (101), with cations and anions interconnected through edge- and corner-sharing polyhedra.
• Hydrogen bonding interactions (O-H⋯S) contribute to the cohesion of adjacent layers.

Conclusions:

• The crystal structure of CaNa(2)(P(2)S(6))·8H(2)O has been elucidated, revealing a layered arrangement.
• The coordination chemistry involves CaO(8), NaO(4)S(2), and NaO(2)S(4) polyhedra, linked to form the extended structure.
• Hydrogen bonding plays a significant role in stabilizing the crystal lattice.