Synthesis and Modular Structural Architectures of Mineralogically Inspired Novel Complex Pb Oxyhalides

Abstract

Three novel Pb oxyhalides, Pb3[O10Pb20](GeO4)4Cl10 (1), [O16Pb22][OPb](OH)I10(I,Br)(H2O) (2), and Pb5.5Si0.5O6Cl (3), have been prepared by high-temperature solid-state reactions (1 and 3) and hydrothermal method (2). The structure of 1 is based upon novel [O10Pb20](20+) layers of edge- and corner-sharing oxocentered OPb4 tetrahedra with cavities occupied by the GeO4 tetrahedral anions. The interlayer space contains low-occupied Pb sites and Cl(-) anions. The structure of 2 contains unique [O16Pb22][12+] layers of edge-sharing OPb4 tetrahedra with X(-) ions (X = I, Br) in and in between the layers. The structure of 3 is the first example of the Pb oxyhalide with the 3:1 ratio between the O-Pb and X sheets (X = halide). The unprecedented structure topologies and architectures observed in the title compounds are closely related to those observed in rare natural Pb oxyhalides that have no synthetic analogues to date.

One-dimensional Coulomb problem in Dirac materials

“…We hope that some interesting features arising from Coulomb physics, such as atomic collapse effects, can soon be observed either in the currently known quasi-1D Dirac materials or in future crystals synthesized with the latest techniques [59].…”

Electronic properties of several two dimensional halides from ab initio calculations

“…Bismuth oxyhalides have been investigated as catalysts, ferroelectric materials, storage materials, and pigments [25]. Siidra et al [26] have investigated the synthesis and modular structural architectures of mineralogically inspired novel Pb oxyhalides. In parallel, theoretical works about these compounds were realized.…”

A Synthetic Analog of the Mineral Ivanyukite: Sorption Behavior to Lead Cations

“…It is known that Pb 2+ cations in acidic chloride-sulfate solutions of metallurgical industries can form stable anionic complexes-such as [PbCl 3 ] − , [PbCl 4 ] 2− , [PbCl 6 ] 4− , among others-which can be extracted from a solution on anion exchangers (e.g., AMP or AM-2b) with -CH 2 N + , -CH 2 N(CH 3 ) 2 , and -CH 2 N(CH 3 ) 3 serving the role of exchange groups [34,35]. The sorption of Pb from acid mine drainage also includes its association to organic hydroxyl and carboxyl, SiO 4 2− , and -R-O-H functional groups [36,37].…”