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Nitride Spinel: An Ultraincompressible High‐Pressure Form of BeP 2 N 4
Author(s) -
Vogel Sebastian,
Bykov Maxim,
Bykova Elena,
Wendl Sebastian,
Kloß Simon D.,
Pakhomova Anna,
Dubrovinskaia Natalia,
Dubrovinsky Leonid,
Schnick Wolfgang
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201910998
Subject(s) - spinel , bulk modulus , nitride , materials science , diamond anvil cell , diffraction , phase transition , ambient pressure , metastability , analytical chemistry (journal) , isothermal process , crystallography , synchrotron radiation , thermodynamics , chemistry , nanotechnology , metallurgy , composite material , optics , physics , organic chemistry , layer (electronics) , chromatography
Abstract Owing to its outstanding elastic properties, the nitride spinel γ‐Si 3 N 4 is of considered interest for materials scientists and chemists. DFT calculations suggest that Si 3 N 4 ‐analog beryllium phosphorus nitride BeP 2 N 4 adopts the spinel structure at elevated pressures as well and shows outstanding elastic properties. Herein, we investigate phenakite‐type BeP 2 N 4 by single‐crystal synchrotron X‐ray diffraction and report the phase transition into the spinel‐type phase at 47 GPa and 1800 K in a laser‐heated diamond anvil cell. The structure of spinel‐type BeP 2 N 4 was refined from pressure‐dependent in situ synchrotron powder X‐ray diffraction measurements down to ambient pressure, which proves spinel‐type BeP 2 N 4 a quenchable and metastable phase at ambient conditions. Its isothermal bulk modulus was determined to 325(8) GPa from equation of state, which indicates that spinel‐type BeP 2 N 4 is an ultraincompressible material.