Synthesis and Crystal Structure of [Li₈(H₂O)₂₉]­[Sn₁₀O₄S₂₀]·2H₂O

Abstract

Li 8 (H 2 O) 29 ][Sn 10 O 4 S 20 ]·2H 2 O (1), which was obtained by an unusual synthesis pathway, represents the Li + salt of the supertetrahedral cluster anion [Sn 10 O 4 S 20 ] 8-. Due to the distinct hydration tendency of Li + , the crystal structure differs notably from that of a corresponding Cs + salt. Compound 1 extends the still very fragmentary

New Lithium Chalcogenidotetrelates, LiChT: Synthesis and Characterization of the Li+-Conducting Tetralithium ortho-Sulfidostannate Li4SnS4

“…18,19 While the lighter homologous ternary systems Li 4 SiS 4 and Li 4−x Si 1−x P x S 4 have been synthesized and show similar conductivities to the corresponding germanates, 13,20 the influence of replacing germanium with the heavier homologue tin has not been investigated so far. On the thiostannate side, the only known compounds are the salt of the dinuclear anion, Li 4 Sn 2 S 6 ·8en, 21 and the salt of a super-tetrahedral cluster, [Li 8 22 In contrast to a variety of heavier homologues, 23 the ortho-thiostannate salt of the lightest alkali metal ion, Li 4 SnS 4 , has not been published to date neither in solvent-free form nor as any solvate. Motivated by the promising developments in inorganic Li + ion conductors, we intended to fill this gap by generating the so far missing, smallest unit and to determine its Li + ion conductivity.…”

Quaternary Diamond‐Like Chalcogenidometalate Networks as Efficient Anode Material in Lithium‐Ion Batteries

“…Before 1985, only lithium metal and lithium alloys were used as anode materials. Especially silicon has shown to be very attractive, due to a very high theoretical capacity of approximately 4000 mAh/g, with a maximum uptake of 4.4 equivalents of Li per Si atom in Li 22 Si 5 . Graphite, with a theoretical capacity of 372 mAh/g, has so far been the standard anode material in commercial lithium batteries.…”

“…[2][3][4] A variety of materials-mostly tin or silicon compounds-belong to the most interesting candidates. Especially silicon has shown to be very attractive, due to a very high theoretical capacity of approximately 4000 mAh/g, with a maximum uptake of 4.4 equivalents of Li per Si atom in Li 22 Si 5 . The main challenge for the implementation of these composite anodes is the large volume change during lithium insertion and extraction.…”

New Transition Metal Oxo‐Thiostannate: Synthesis, Characterization, and Investigation of its Photocatalytic Properties

“…It has an idealized T d symmetry and can be described as a supertetrahedral cluster (denoted as T3) formed by ten corner‐linked SnS 4 polyhedra. Four empty sites are occupied by O 2– anions expanding the coordination number of Sn from four to five or six , , . All Sn‐O‐S compounds contain isolated [Sn 10 S 20 O 4 ] 8– anionic clusters with inorganic cations compensating the negative charges like in [Cs 8 (H 2 O) 13 ][Sn 10 S 20 O 4 ] and [Li 8 (H 2 O) 29 ][Sn 10 S 20 O 4 ] · 2H 2 O, and only in {[Ni(1,2‐dach) 2 (ma)] 4 [Sn 10 S 20 O 4 ]} (1,2‐dach = 1,2‐diaminocyclohexane; ma = methylamine) the cluster is expanded via sulfur atoms to Ni 2+ centered complexes.…”

“…Four empty sites are occupied by O 2anions expanding the coordination number of Sn from four to five or six. [24,25,29] [24] and only in {[Ni(1,2-dach) 2 (ma)] 4 [Sn 10 S 20 O 4 ]} (1,2-dach = 1,2-diaminocyclohexane; ma = methylamine) [30] the cluster is expanded via sulfur atoms to Ni 2+ centered complexes.…”