Single‐Bonded Cubic AsN from High‐Pressure and High‐Temperature Chemical Reactivity of Arsenic and Nitrogen

Abstract

Chemical reactivity between As and N 2 ,l eading to the synthesis of crystalline arsenic nitride,i sh ere reported under high pressure and high temperature conditions generated by laser heating in ad iamond anvil cell. Single-crystal synchrotron X-rayd iffraction at different pressures between 30 and 40 GPaprovides evidence for the synthesis of acovalent compound of AsN stoichiometry,crystallizing in acubic P2 1 3 space group,inwhich eachofthe two elements is single-bonded to three atoms of the other and hosts an electron lone pair,i n at etrahedral anisotropic coordination. The identification of characteristic structural motifs highlights the key role played by the directional repulsive interactions between non-bonding electron lone pairs in the formation of the AsN structure. Additional data indicate the existence of AsN at room temperature from 9.8 up to 50 GPa. Implications concern fundamental aspects of pnictogens chemistry and the synthesis of innovative advanced materials.

High-Pressure and High-Temperature Chemistry of Phosphorus and Nitrogen: Synthesis and Characterization of α- and γ-P3N5

“…While this manuscript was in preparation, a paper on the same topic was published by a Japanese group led by Hasegawa . Whereas some findings of the recent paper are consistent with our previous results, , relevant differences apply, leading to contrasting conclusions, particularly concerning the comprehension of the reactive process and the characterization of the products.…”

Domain Auto Finder (DAFi) program: the analysis of single-crystal X-ray diffraction data from polycrystalline samples

“…This approach was devised for and first applied to studying products of chemical reactions and phase transformations in laser-heated diamond anvil cells (DACs); this has led to discoveries of many exotic compounds, revealing their crystal structures in situ under high pressure (e.g. Bykova et al, 2016Bykova et al, , 2018Laniel, Winkler, Bykova et al, 2020;Laniel, Winkler, Fedotenko et al, 2020;Bykov et al, 2020Bykov et al, , 2021Ceppatelli et al, 2022).…”