The diphyllosilicate Rb2(VO)2[Si8O19].

Area of Science:

• Inorganic Chemistry
• Crystal Engineering
• Materials Science

Background:

• Diphyllosilicates are layered silicate structures with diverse applications.
• Anhydrous silicates containing transition metals are of significant interest for their unique properties.
• Vanadium (V) compounds exhibit varied oxidation states and coordination chemistries.

Purpose of the Study:

• To synthesize and characterize a novel anhydrous diphyllosilicate containing tetravalent vanadium.
• To elucidate the crystal structure of dirubidium divanadyl phyllooctasilicate.
• To investigate the structural relationship with related copper-containing compounds.

Main Methods:

• Single-crystal X-ray diffraction analysis.
• Chemical synthesis and characterization.
• Crystallographic structure determination.

Main Results:

• Dirubidium divanadyl phyllooctasilicate, Rb(2)(VO)(2)[Si(8)O(19)], was synthesized and structurally characterized.
• The compound crystallizes in a noncentrosymmetric orthorhombic space group, distinct from related A(2)Cu(2)[Si(8)O(19)] compounds.
• The structure comprises silicate double layers separated by [V(2)O(8)](8-) dimers, with unique V(IV) coordination.

Conclusions:

• This work reports the first anhydrous diphyllosilicate incorporating V(IV).
• The unique structural arrangement offers a new framework for designing functional materials.
• The study expands the known family of phyllooctasilicates with transition metal incorporation.