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Mirdha RH, Naskar P, Chaudhury P. Constructing transformation paths for conformational changes in (MgF 2) n clusters using a stochastic procedure. Mol Phys 2020. [DOI: 10.1080/00268976.2019.1645368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - Pulak Naskar
- Department of Chemistry, University of Calcutta, Kolkata, India
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2
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Neogi SG, Chaudhury P. Structure, electronic properties and vibrational spectra of (MgF2)nclusters through a combination of genetic algorithm and DFT-based approach. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1059508] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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Neelamraju S, Schön JC, Jansen M. Atomistic modeling of the low-temperature atom-beam deposition of magnesium fluoride. Inorg Chem 2015; 54:782-91. [PMID: 25247766 DOI: 10.1021/ic501499k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We model the deposition and growth of MgF(2) on a sapphire substrate as it occurs in a low-temperature atom-beam-deposition experiment. In the experiment, an (X-ray) amorphous film of MgF(2) is obtained at low temperatures of 170-180 K, and upon heating, this transforms to the expected rutile phase via the CaCl(2)-type structure. We confirm this from our simulations and propose a mechanism for this transformation. The growth process is analyzed as a function of the synthesis parameters, which include the substrate temperature, deposition rate of clusters, and types of clusters deposited. Upon annealing an initially amorphous deposit, we observe the formation of two competing nanocrystalline modifications during this process, which exhibit the CaCl(2) and CdI(2) structure types, respectively. We argue that this joint growth of the two nanocrystalline polymorphs stabilizes the kinetically unstable CaCl(2)-type structure on the macroscopic level long enough to be observed in the experiment.
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Affiliation(s)
- Sridhar Neelamraju
- Max Planck Institute for Solid State Research , Heisenbergstrasse 1, D-70569 Stuttgart, Germany
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4
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Kanaki E, Sansone G, Maschio L, Paulus B. The effect of electron correlation on the adsorption of hydrogen fluoride and water on magnesium fluoride surfaces. Phys Chem Chem Phys 2015; 17:18722-8. [DOI: 10.1039/c5cp02017d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Periodic DFT and local MP2 calculations elucidate the role of electron correlation in the adsorption of H2O and HF on MgF2 surfaces.
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Affiliation(s)
- Elisavet Kanaki
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
| | - Giuseppe Sansone
- University of Torino
- Department of Chemistry
- Theoretical Chemistry Group
- 10125 Torino
- Italy
| | - Lorenzo Maschio
- University of Torino
- Department of Chemistry
- Theoretical Chemistry Group
- 10125 Torino
- Italy
| | - Beate Paulus
- Freie Universität Berlin
- Institut für Chemie und Biochemie
- 14195 Berlin
- Germany
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Ellis JK, Wen XD, Martin RL. Investigation of thorium salts as candidate materials for direct observation of the (229m)Th nuclear transition. Inorg Chem 2014; 53:6769-74. [PMID: 24937606 DOI: 10.1021/ic500570u] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recent efforts to measure the (229m)Th → (229g)Th nuclear transition sparked interest in understanding the electronic structure of wide-gap thorium salts. Such materials could be used to measure this nuclear transition using optical spectroscopy in solid-state devices. Here, we present screened hybrid density functional theory and many-body G0W0 calculations of two candidate materials, namely, Na2ThF6 and ThF4, for such a measurement. Our results show an electronic gap larger than 10 eV for both materials, suggesting that the internal conversion nuclear de-excitation channel would be suppressed in these materials. We also present results for ThX4 (X = Cl, Br, I), materials with smaller gaps significantly easier to access experimentally.
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Affiliation(s)
- Jason K Ellis
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
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6
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Mu X, Neelamraju S, Sigle W, Koch CT, Totò N, Schön JC, Bach A, Fischer D, Jansen M, van Aken PA. Evolution of order in amorphous-to-crystalline phase transformation of MgF2. J Appl Crystallogr 2013. [DOI: 10.1107/s0021889813011345] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Structural disorder and distortion play a significant role in phase transformations. Experimentally, electron diffraction in the transmission electron microscope offers the ability to characterize disorderviathe pair distribution function (PDF) at high spatial resolution. In this work, energy-filteredin situelectron diffraction is applied to measure PDFs of different phases of MgF2from the amorphous deposit through metastable modifications to the thermodynamically stable phase. Despite the restriction of thick specimens resulting in multiple electron scattering, elaborate data analysis enabled experimental and molecular dynamics simulation data to be matched, thus allowing analysis of the evolution of short-range ordering. In particular, it is possible to explain the theoretically not predicted existence of a metastable phase by the presence of atomic disorder and distortion. The short-range ordering in the amorphous and crystalline phases is elucidated as three steps: (i) an initial amorphous phase exhibiting CaCl2-type short-range order which acts as a crystallization nucleus to guide the phase transformation to the metastable CaCl2-type phase and thus suppresses the direct appearance of the rutile-type phase; (ii) a metastable CaCl2-type phase containing short-range structural features of the stable rutile type; and (iii) the formation of a large volume fraction of disordered intergranular regions which stabilize the CaCl2-type phase. The structure evolution is described within the energy landscape concept.
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Neelamraju S, Bach A, Schön JC, Fischer D, Jansen M. Experimental and theoretical study on Raman spectra of magnesium fluoride clusters and solids. J Chem Phys 2012. [DOI: 10.1063/1.4765700] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yi Z, Jia R. Quasiparticle band structures and optical properties of magnesium fluoride. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:085602. [PMID: 22277330 DOI: 10.1088/0953-8984/24/8/085602] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The quasiparticle and optical properties of magnesium fluoride (MgF(2)) are computed within the GW approximation based on many-body perturbation theory (MBPT). The many-body effects appearing in self-energy and electron-hole interactions have an important influence on the electronic and optical properties. The DFT-LDA calculation shows a 6.78 eV band gap. Two methods are employed to evaluate the self-energy within the GW approximation in the present work. The generalized plasmon pole model (GPP) provides a band gap of 12.17 eV, which agrees well with the experimental value of 12.4 eV (Thomas et al 1973 Phys. Status Solidi b 56 163). Another band gap value of 11.30 eV is obtained by using a full frequency-dependent self-energy, which is also not far from the experimental value and is much better than the result from the LDA calculation. The calculated optical spectrum within DFT is significantly different from the experiment. Although the calculated optical absorption threshold within the GW method is close to the experiment, the overall shape of the spectrum is still similar to the case of DFT. However, the overall shape of the spectrum via the Bethe-Salpeter equation (BSE) method agrees well with the experiment.
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Affiliation(s)
- Zhijun Yi
- Department of Physics, University at Buffalo, SUNY, Buffalo, NY 14260, USA
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Neelamraju S, Schön JC, Doll K, Jansen M. Ab initio and empirical energy landscapes of (MgF2)nclusters (n = 3, 4). Phys Chem Chem Phys 2012; 14:1223-34. [DOI: 10.1039/c1cp22446h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Ramesh Babu K, Bheema Lingam C, Auluck S, Tewari SP, Vaitheeswaran G. Structural, thermodynamic and optical properties of MgF2 studied from first-principles theory. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2010.11.025] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Hermansson K, Probst MM, Gajewski G, Mitev PD. Anharmonic OH vibrations in Mg(OH)2 (brucite): Two-dimensional calculations and crystal-induced blueshift. J Chem Phys 2009; 131:244517. [DOI: 10.1063/1.3266507] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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13
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El Gridani A, El Mouhtadi M. Electronic and structural properties of CaH2: an ab initio Hartree–Fock study. Chem Phys 2000. [DOI: 10.1016/s0301-0104(99)00333-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Francisco E, Recio JM, Blanco MA, Pendás AM, Costales A. Quantum-Mechanical Study of Thermodynamic and Bonding Properties of MgF2. J Phys Chem A 1998. [DOI: 10.1021/jp972516j] [Citation(s) in RCA: 379] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- E. Francisco
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006-Oviedo, Spain
| | - J. M. Recio
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006-Oviedo, Spain
| | - M. A. Blanco
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006-Oviedo, Spain
| | - A. Martín Pendás
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006-Oviedo, Spain
| | - A. Costales
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006-Oviedo, Spain
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Clerc DG, Poshusta RD, Hess AC. Periodic Hartree−Fock Study of LixTiS2, 0 ≤ x ≤ 1: The Structural, Elastic, and Electronic Effects of Lithium Intercalation in TiS2. J Phys Chem A 1997. [DOI: 10.1021/jp9618789] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- D. G. Clerc
- Materials Science Program, Washington State University, Pullman, Washington 99164-4630
| | - R. D. Poshusta
- Materials Science Program, Washington State University, Pullman, Washington 99164-4630
| | - A. C. Hess
- Environmental Molecular Sciences Laboratory, MS K1-90, Pacific Northwest Laboratory, Richland, Washington 99352
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Baranek P, Schamps J, Noiret I. Ab Initio Studies of Electronic Structure, Phonon Modes, and Elastic Properties of Mg2Si. J Phys Chem B 1997. [DOI: 10.1021/jp970448v] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Philippe Baranek
- Laboratoire de Dynamique Moléculaire et Photonique, URA CNRS 779, Centre d'Etudes et de Recherches Lasers et Applications, Université de Lille 1, UFR de Physique, 59655 Villeneuve d'Ascq Cedex, France
| | - Joël Schamps
- Laboratoire de Dynamique Moléculaire et Photonique, URA CNRS 779, Centre d'Etudes et de Recherches Lasers et Applications, Université de Lille 1, UFR de Physique, 59655 Villeneuve d'Ascq Cedex, France
| | - Isabelle Noiret
- Laboratoire de Dynamique et Structure des Matériaux Moléculaires, URA CNRS 801, Université de Lille 1, UFR de Physique, 59655 Villeneuve d'Ascq Cedex, France
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Barrera GD, Taylor MB, Allan NL, Barron THK, Kantorovich LN, Mackrodt WC. Ionic solids at elevated temperatures and high pressures: MgF2. J Chem Phys 1997. [DOI: 10.1063/1.474774] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Affiliation(s)
- D. G. Clerc
- Materials Science Program, Washington State University, Pullman, Washington 99164-4630
| | - R. D. Poshusta
- Materials Science Program, Washington State University, Pullman, Washington 99164-4630
| | - A. C. Hess
- Environmental Molecular Sciences Laboratory, MS K1-90, Pacific Northwest Laboratory, Richland, Washington 99352
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20
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Thermodynamical properties of solids from microscopic theory: applications to MgF2 and Al2O3. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s0166-1280(96)90571-0] [Citation(s) in RCA: 467] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Reyes-Serrato A, Galván DH, Garzón IL. Ab initio Hartree-Fock study of structural and electronic properties of beta -Si3N4 and beta -C3N4 compounds. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:6293-6300. [PMID: 9981859 DOI: 10.1103/physrevb.52.6293] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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Nishidate K, Baba M, Sato T, Nishikawa K. Molecular-dynamics studies on the shock-induced phase transition of a MgF2 crystal. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:3170-3176. [PMID: 9981433 DOI: 10.1103/physrevb.52.3170] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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23
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Valerio G, Catti M, Dovesi R, Orlando R. Ab initio study of antiferromagnetic rutile-type FeF2. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:2422-2427. [PMID: 9981308 DOI: 10.1103/physrevb.52.2422] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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24
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Prencipe M, Zupan A, Dovesi R, Apr E, Saunders VR. Ab initio study of the structural properties of LiF, NaF, KF, LiCl, NaCl, and KCl. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:3391-3396. [PMID: 9979146 DOI: 10.1103/physrevb.51.3391] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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25
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Towler MD, Allan NL, Harrison NM, Saunders VR, Mackrodt WC, Apr E. Ab initio study of MnO and NiO. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:5041-5054. [PMID: 9976841 DOI: 10.1103/physrevb.50.5041] [Citation(s) in RCA: 128] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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26
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Allan NL, Hines RI, Towler MD, Mackrodt WC. Calculated pressure‐induced phase transition in MgF2. J Chem Phys 1994. [DOI: 10.1063/1.466259] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Ruiz E, Alvarez S, Alemany P. Electronic structure and properties of AlN. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:7115-7123. [PMID: 10009448 DOI: 10.1103/physrevb.49.7115] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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28
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Baraille I, Pouchan C, Causa M, Pisani C. An ab initio Hartree—Fock study of electronic and structural properties of MgH2. Chem Phys 1994. [DOI: 10.1016/0301-0104(93)e0328-s] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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29
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Söderlind P, Eriksson O, Wills JM, Boring AM. Elastic constants of cubic f-electron elements: Theory. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:9306-9312. [PMID: 10007165 DOI: 10.1103/physrevb.48.9306] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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30
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31
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Erikson RL, Eary LE, Hostetler CJ. Energetics, structure, and compressibility of NaF determined by the periodic Hartree–Fock method. J Chem Phys 1993. [DOI: 10.1063/1.465811] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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32
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Zupan A, Petek I, Caus M, Dovesi R. Elastic constants, phase transition, and electronic structure of strontium oxide SrO: An ab initio Hartree-Fock study. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:799-806. [PMID: 10007935 DOI: 10.1103/physrevb.48.799] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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33
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Catti M, Pavese A, Dovesi R, Saunders VR. Static lattice and electron properties of MgCO3 (magnesite) calculated by ab initio periodic Hartree-Fock methods. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:9189-9198. [PMID: 10004981 DOI: 10.1103/physrevb.47.9189] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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34
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Nga YA, Ong CK. Molecular dynamics study of pressure‐induced transition in MgF2. J Chem Phys 1993. [DOI: 10.1063/1.464096] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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