ChemInform Abstract: Proton Mobility and Structure of Indium Hydrogen Selenite Trihydrate.

Abstract

Proton Mobility and Structure of Indium Hydrogen Selenite Trihydrate. -X-ray studies indicate that the title compound, In(HSeO 3 ) 3 ·3H 2 O, crystallizes in the trigonal system (space group R3m, Z=1). Its indium atoms are octahedrally surrounded by six oxygen atoms. The water molecules are localized in the octahedra channels and form hydrogen bonds with the HSeO 3 − anions. The structure of the proton-containing fragment and the proton mobility are studied by NMR. -(YAROSLAVTSEV, A. B.; NIKOLAEV, A. E.; ILYUKHIN, A. B.; CHUVAEV, V. F.; Zh.

Cation Size Effect on the Framework Structures in a Series of New Alkali-Metal Indium Selenites, AIn(SeO3)2 (A = Na, K, Rb, and Cs)

“…Crystallographic data and selected bond distances with bond valence sums for the reported material are given in Tables and . An examination of 16 examples of InO 6 octahedra exhibits that the In–O bond distances range from 2.073(4) Å to 2.359(10) Å with the average distance of 2.156 Å. − Also, an examination of 36 examples of SeO 3 polyhedra reveals that the Se–O bond lengths range from 1.552(10) Å to 1.806(33) Å with the average distance of 1.700 Å. − As can be seen in Table , all the In–O and Se–O bond distances for the reported materials are consistent with those of previously reported indium selenites materials.…”

“…Although the In 3+ cation, as a p-element, can form a larger and stable octahedral coordination environment with greater flexibility, Se 4+ inherently possesses asymmetric structural geometry attributed to the nonbonded electron pair. In fact, several indium selenites materials such as Cs 3 H 6 In 5 (SeO 3 ) 12 , CsIn 3 H 2 (SeO 3 ) 6 (H 2 O) 2 , In(HSeO 3 )(SeO 3 ), In(HSeO 3 ) 3 (H 2 O) 3 , In 2 (Se 2 O 5 ) 3 , In(OH)(SeO 3 ), In 2 Cu 3 (SeO 3 ) 6 , [In 2 (SeO 3 ) 2 (C 2 O 4 )(H 2 O) 2 ]·2H 2 O, In 2 Mo 2 Se 2 O 13 (H 2 O), InSeO 3 Cl, and InVSe 2 O 8 have been reported. Among them, In 2 (Se 2 O 5 ) 3 and InVSe 2 O 8 crystallize in NCS framework structures and exhibit SHG efficiencies of 10 and 30 times that of α-SiO 2 , respectively.…”