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Zhang W, Oganov AR, Zhu Q, Lobanov SS, Stavrou E, Goncharov AF. Stability of numerous novel potassium chlorides at high pressure. Sci Rep 2016; 6:26265. [PMID: 27211847 PMCID: PMC4876327 DOI: 10.1038/srep26265] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 04/28/2016] [Indexed: 11/29/2022] Open
Abstract
K-Cl is a simple system displaying all four main types of bonding, as it contains (i) metallic potassium, (ii) elemental chlorine made of covalently bonded Cl2 molecules held together by van der Waals forces, and (iii) an archetypal ionic compound KCl. The charge balance rule, assigning classical charges of "+1" to K and "-1" to Cl, predicts that no compounds other than KCl are possible. However, our quantum-mechanical variable-composition evolutionary simulations predict an extremely complex phase diagram, with new thermodynamically stable compounds K3Cl, K2Cl, K3Cl2, K4Cl3, K5Cl4, K3Cl5, KCl3 and KCl7. Of particular interest are 2D-metallic homologs Kn+1Cln, the presence of positively charged Cl atoms in KCl7, and the predicted stability of KCl3 already at nearly ambient pressures at zero Kelvin. We have synthesized cubic -KCl3 at 40-70 GPa and trigonal -KCl3 at 20-40 GPa in a laser-heated diamond anvil cell (DAC) at temperature exceeding 2000 K from KCl and Cl2. These phases were identified using in situ synchrotron X-ray diffraction and Raman spectroscopy. Upon unloading to 10 GPa, -KCl3 transforms to a yet unknown structure before final decomposition to KCl and Cl2 at near-ambient conditions.
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Affiliation(s)
- Weiwei Zhang
- Department of Applied Physics, China Agricultural University, Beijing, 100080, China
- Department of Geosciences, Center for Materials by Design, and Institute for Advanced Computational Science, State University of New York, Stony Brook, New York 11794-2100, USA
| | - Artem R. Oganov
- Department of Geosciences, Center for Materials by Design, and Institute for Advanced Computational Science, State University of New York, Stony Brook, New York 11794-2100, USA
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, 3 Nobel St., Moscow 143026, Russia
- Moscow Institute of Physics and Technology, 9 Institutskiy Lane, Dolgoprudny city, Moscow Region 141700, Russia
- Northwestern Polytechnical University, Xi’an 710072, China
| | - Qiang Zhu
- Department of Geosciences, Center for Materials by Design, and Institute for Advanced Computational Science, State University of New York, Stony Brook, New York 11794-2100, USA
| | - Sergey S. Lobanov
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, D.C. 20015, USA
- V.S. Sobolev Institute of Geology and Mineralogy, SB RAS, 3 Pr. Ac. Koptyga, Novosibirsk 630090, Russia
| | - Elissaios Stavrou
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, D.C. 20015, USA
- Lawrence Livermore National Laboratory, Physical and Life Sciences Directorate, P.O. Box 808 L-350, Livermore, California 94550, USA
| | - Alexander F. Goncharov
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, D.C. 20015, USA
- Key Laboratory of Materials Physics, Institute of Solid State Physics, CAS, Hefei, 230031, China
- University of Science and Technology of China, Hefei, 230026, China
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Osman HH, Pertierra P, Salvadó MA, Izquierdo-Ruiz F, Recio JM. Structure and bonding in crystalline cesium uranyl tetrachloride under pressure. Phys Chem Chem Phys 2016; 18:18398-405. [DOI: 10.1039/c6cp03876j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
First-principles simulations of Cs2UO2Cl4 under hydrostatic pressure reveal an unexpected variation of the U–O bond length and stretching vibrational frequencies.
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Affiliation(s)
- Hussien H. Osman
- MALTA-Consolider Team and Departamento de Química Física y Analítica
- Universidad de Oviedo
- Oviedo
- Spain
- Department of Chemistry
| | - Pilar Pertierra
- MALTA-Consolider Team and Departamento de Química Física y Analítica
- Universidad de Oviedo
- Oviedo
- Spain
| | - Miguel A. Salvadó
- MALTA-Consolider Team and Departamento de Química Física y Analítica
- Universidad de Oviedo
- Oviedo
- Spain
| | - F. Izquierdo-Ruiz
- MALTA-Consolider Team and Departamento de Química Física y Analítica
- Universidad de Oviedo
- Oviedo
- Spain
| | - J. M. Recio
- MALTA-Consolider Team and Departamento de Química Física y Analítica
- Universidad de Oviedo
- Oviedo
- Spain
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Shamp A, Saitta P, Zurek E. Theoretical predictions of novel potassium chloride phases under pressure. Phys Chem Chem Phys 2015; 17:12265-72. [PMID: 25891957 DOI: 10.1039/c5cp00470e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Above 350 GPa KCl assumes an hcp lattice that is reminiscent of the isoelectronic noble gas Ar.
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Affiliation(s)
- Andrew Shamp
- Department of Chemistry
- State University of New York at Buffalo
- Buffalo
- USA
| | - Patrick Saitta
- Department of Chemistry
- State University of New York at Buffalo
- Buffalo
- USA
| | - Eva Zurek
- Department of Chemistry
- State University of New York at Buffalo
- Buffalo
- USA
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Jenkins HDB, Glasser L, Lee J. Volume-based thermoelasticity: consequences of the (near) proportionality of isothermal compressibility to formula-unit volume. Inorg Chem 2010; 49:9978-84. [PMID: 20932018 DOI: 10.1021/ic101398g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Groups of structurally related materials, including the alkali halides, exhibit a proportionality of isothermal compressibility to formula-unit volume. The relationship has recently been explored by Glasser and by Recio et al. In this paper, we present the consequences of such proportionality on the relationships of Born-Landé and Born-Mayer parameters to the formula-unit volume. These relationships have then been tested separately on (i) alkali (excluding cesium) halides and (ii) cesium halides. We conclude that the equations fit the NaCl-type materials satisfactorily, but less well for the CsCl-type materials, and that the Born-Mayer equation is more applicable. These results confirm the conclusion that volume is intimately linked to thermodynamic quantities, as already demonstrated by our development of volume-based thermodynamics (VBT).
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Pendás AM, Costales A, Luaña V. Ions in Crystals: The Topology of the Electron Density in Ionic Materials. III. Geometry and Ionic Radii. J Phys Chem B 1998. [DOI: 10.1021/jp980906f] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Martín Pendás
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, E-33006-Oviedo, Spain
| | - Aurora Costales
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, E-33006-Oviedo, Spain
| | - Víctor Luaña
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, E-33006-Oviedo, Spain
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Francisco E, Recio JM, Blanco MA, Pendás AM, Pueyo L. Derivation of electron-gas interatomic potentials from quantum-mechanical descriptions of ions in crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:2703-2714. [PMID: 9979041 DOI: 10.1103/physrevb.51.2703] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Pendás AM, Luaña V, Recio JM, Flórez M, Francisco E, Blanco MA, Kantorovich LN. Pressure-induced B1-B2 phase transition in alkali halides: General aspects from first-principles calculations. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:3066-3074. [PMID: 10011161 DOI: 10.1103/physrevb.49.3066] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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