Orpiment under compression: metavalent bonding at high pressure

Vanesa Paula Cuenca-Gotor; Juan Ángel Sans; Oscar Gomis; Andres Mujica; Silvana Radescu; Alfonso Muñoz; Plácida Rodríguez-Hernández; Estelina Lora da Silva; Catalin Popescu; Jordi Ibañez; Rosario Vilaplana; Francisco Javier Manjón

doi:10.1039/c9cp06298j

Orpiment under compression: metavalent bonding at high pressure

Physical Chemistry Chemical Physics ◽

10.1039/c9cp06298j ◽

2020 ◽

Vol 22 (6) ◽

pp. 3352-3369 ◽

Cited By ~ 4

Author(s):

Vanesa Paula Cuenca-Gotor ◽

Juan Ángel Sans ◽

Oscar Gomis ◽

Andres Mujica ◽

Silvana Radescu ◽

...

Keyword(s):

Phase Transition ◽

High Pressure ◽

Strong Change ◽

Isostructural Phase Transition

Orpiment (α-As2S3) under compression reports a strong change in the coordination of As atoms at 25 GPa, which can be ascribed to an isostructural phase transition. These changes are consistent with the formation of metavalent bonds in orpiment.

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The Madelung constant and bonding angle as “sensors” of the high-pressure induced amorphization and first-order isostructural phase transition in Mg(OH)2 and Ca(OH)2

Journal of Solid State Chemistry ◽

10.1016/j.jssc.2021.121993 ◽

2021 ◽

Vol 296 ◽

pp. 121993

Author(s):

Valeri S. Harutyunyan

Keyword(s):

Phase Transition ◽

High Pressure ◽

Madelung Constant ◽

First Order ◽

Isostructural Phase Transition

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Isostructural Phase Transition in Bismuth Oxide Chloride Induced by Redistribution of Charge under High Pressure

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.5b07180 ◽

2015 ◽

Vol 119 (49) ◽

pp. 27657-27665 ◽

Cited By ~ 14

Author(s):

Jinggeng Zhao ◽

Lingling Xu ◽

Yang Liu ◽

Zhenhai Yu ◽

Chunyu Li ◽

...

Keyword(s):

Phase Transition ◽

High Pressure ◽

Bismuth Oxide ◽

Isostructural Phase Transition

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Publisher's Note: Experimental Evidence for a High-Pressure Isostructural Phase Transition in Osmium [Phys. Rev. Lett.93, 095502 (2004)]

Physical Review Letters ◽

10.1103/physrevlett.93.109901 ◽

2004 ◽

Vol 93 (10) ◽

Cited By ~ 5

Author(s):

Florent Occelli ◽

Daniel L. Farber ◽

James Badro ◽

Chantel M. Aracne ◽

David M. Teter ◽

...

Keyword(s):

Phase Transition ◽

High Pressure ◽

Experimental Evidence ◽

Isostructural Phase Transition

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Evidence for a high-pressure isostructural transition in nitrogen

10.21203/rs.3.rs-1019523/v1 ◽

2021 ◽

Author(s):

Chunmei Fan ◽

Shan Liu ◽

Jingyi Liu ◽

Qiqi Tang ◽

Binbin Wu ◽

...

Keyword(s):

Phase Transition ◽

Phase Diagram ◽

High Pressure ◽

Lattice Parameter ◽

Molecular Symmetry ◽

Solid Nitrogen ◽

Slight Rotation ◽

Pressure Phase ◽

Important Objective ◽

Isostructural Phase Transition

Abstract Understanding the high-pressure behaviors of diatomic molecules (H2, O2, N2, etc) is one of the most basic as well as important objective in high-pressure physics. Under high pressure diatomic molecule solids often exhibit rich crystal polymorphs. High-pressure isostructural transitions (HPIT) in solid hydrogen and oxygen, involving considerable technical challenges, have been experimentally documented, suggesting a possible prevailing pressure-driven molecular-symmetry breaking pathway. In spite of extensive efforts, however, HPIT in nitrogen has not been observed so far. Here we present a monoclinic-to-monoclinic isostructural phase transition (λ→λ’) in solid nitrogen at approximately 50 GPa accompanied with anomalies in lattice parameter, atomic volume and Raman vibron modes. Further ab initio calculations strongly confirmed the HPIT in nitrogen, showing the weak distortion of orientation and slight rotation in nitrogen molecules possibly drive the low-pressure phase, λ-N2, to an isostructural high-pressure phase, λ’-N2 without changing crystal symmetry. In addition, we probed in detail the phase stability and revisited the pressure-temperature (P-T) phase diagram of nitrogen, discovering a new high-pressure amorphous phase, η’-N2.

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