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Sichevych O, Flipo S, Ormeci A, Bobnar M, Akselrud L, Prots Y, Burkhardt U, Gumeniuk R, Leithe-Jasper A, Grin Y. Crystal Structure and Physical Properties of the Cage Compound Hf 2B 2-2δIr 5+δ. Inorg Chem 2020; 59:14280-14289. [PMID: 32946694 PMCID: PMC7586331 DOI: 10.1021/acs.inorgchem.0c02073] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
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Hf2B2–2δIr5+δ crystallizes
with a new type of structure: space group Pbam, a = 5.6300(3) Å, b = 11.2599(5)
Å, and c = 3.8328(2) Å. Nearly 5% of the
boron pairs are randomly replaced by single iridium atoms (Ir5+δB2–2δ). From an analysis of
the chemical bonding, the crystal structure can be understood as a
three-dimensional framework stabilized by covalent two-atom B–B
and Ir–Ir as well as three-atom Ir–Ir–B and Ir–Ir–Ir
interactions. The hafnium atoms center 14-atom cavities and transfer
a significant amount of charge to the polyanionic boron–iridium
framework. This refractory boride displays moderate hardness and is
a Pauli paramagnet with metallic electrical resistivity, Seebeck coefficient,
and thermal conductivity. The metallic character of this system is
also confirmed by electronic structure calculations revealing 5.8
states eV–1 fu–1 at the Fermi
level. Zr2B2–2δIr5+δ is found to be isotypic with Hf2B2–2δIr5+δ, and both form a continuous solid solution. Hf2Ir5+δB2−2δ is a cage compound with a three-dimensional
anionic boron−iridium
framework composed of [B2Ir8] units with cavities
bearing the hafnium cations. Zr2Ir5+δB2−2δ is found to be isotypic with Hf2Ir5+δB2−2δ, and both form
a continuous solid solution.
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Affiliation(s)
- Olga Sichevych
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Sever Flipo
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany.,Institut für Experimentelle Physik, TU Bergakademie Freiberg, Leipziger Straße 23, 09599 Freiberg, Germany
| | - Alim Ormeci
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Matej Bobnar
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Lev Akselrud
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Yurii Prots
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Ulrich Burkhardt
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Roman Gumeniuk
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany.,Institut für Experimentelle Physik, TU Bergakademie Freiberg, Leipziger Straße 23, 09599 Freiberg, Germany
| | - Andreas Leithe-Jasper
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Yuri Grin
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, Germany
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Hübner JM, Prots Y, Schnelle W, Bobnar M, König M, Baitinger M, Simon P, Carrillo-Cabrera W, Ormeci A, Svanidze E, Grin Y, Schwarz U. In-Cage Interactions in the Clathrate Superconductor Sr 8 Si 46. Chemistry 2020; 26:830-838. [PMID: 31652015 PMCID: PMC7004181 DOI: 10.1002/chem.201904170] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/23/2019] [Indexed: 11/30/2022]
Abstract
The clathrate I superconductor Sr8Si46 is obtained under high‐pressure high‐temperature conditions, at 5 GPa and temperatures in the range of 1273 to 1373 K. At ambient pressure, the compound decomposes upon heating at T=796(5) K into Si and SrSi2. The crystal structure of the clathrate is isotypic to that of Na8Si46. Chemical bonding analysis reveals conventional covalent bonding within the silicon network as well as additional multi‐atomic interactions between Sr and Si within the framework cages. Physical measurements indicate a bulk BCS type II superconducting state below Tc=3.8(3) K.
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Affiliation(s)
- Julia-Maria Hübner
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Yurii Prots
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Walter Schnelle
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Matej Bobnar
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Markus König
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Michael Baitinger
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Paul Simon
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Wilder Carrillo-Cabrera
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Alim Ormeci
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Eteri Svanidze
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Yuri Grin
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Ulrich Schwarz
- Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187, Dresden, Germany
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Zeng T, Hoffmann R, Nesper R, Ashcroft NW, Strobel TA, Proserpio DM. Li-Filled, B-Substituted Carbon Clathrates. J Am Chem Soc 2015; 137:12639-52. [DOI: 10.1021/jacs.5b07883] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tao Zeng
- Baker
Laboratory, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
- Department
of Chemistry, Carleton University, Ottawa, Ontario K1S5B6, Canada
| | - Roald Hoffmann
- Baker
Laboratory, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Reinhard Nesper
- Laboratory
of Inorganic Chemistry, ETH Zürich, Vladimir-Prelog-Weg 1, CH-8093 Zürich, Switzerland
| | - N. W. Ashcroft
- Laboratory
of Atomic and Solid Physics, Cornell University, Ithaca, New York 14853, United States
| | - Timothy A. Strobel
- Geophysical
Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, D.C. 20015, United States
| | - Davide M. Proserpio
- Dipartimento
di Chimica, Università degli Studi di Milano, 20133 Milano, Italy
- Samara
Center for Theoretical Materials Science (SCTMS), Samara State University, Samara 443011 Russia
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Feng XJ, Prots Y, Bobnar M, Schmidt MP, Schnelle W, Zhao JT, Grin Y. Zintl-Phase Sr3LiAs2H: Crystal Structure and Chemical Bonding Analysis by the Electron Localizability Approach. Chemistry 2015; 21:14471-7. [PMID: 26291332 DOI: 10.1002/chem.201501236] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Xian-Juan Feng
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden (Germany)
| | - Yurii Prots
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden (Germany)
| | - Matej Bobnar
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden (Germany)
| | - Marcus Peter Schmidt
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden (Germany)
| | - Walter Schnelle
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden (Germany)
| | - Jing-Tai Zhao
- School of Materials Science and Engineering, Shanghai University, Shangda Rd. 99, 200444 Shanghai (P. R. China)
| | - Yuri Grin
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden (Germany).
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Palasyuk A, Grin Y, Miller GJ. Turning Gold into “Diamond”: A Family of Hexagonal Diamond-Type Au-Frameworks Interconnected by Triangular Clusters in the Sr–Al–Au System. J Am Chem Soc 2014; 136:3108-17. [DOI: 10.1021/ja411150e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Andriy Palasyuk
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Yuri Grin
- Max-Planck-Institut
für Chemische Physik fester Stoffe, Dresden, Germany
| | - Gordon J. Miller
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011
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Solid State Chemistry of Clathrate Phases: Crystal Structure, Chemical Bonding and Preparation Routes. THE PHYSICS AND CHEMISTRY OF INORGANIC CLATHRATES 2014. [DOI: 10.1007/978-94-017-9127-4_2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Feng XJ, Prots Y, Schmidt MP, Hoffmann S, Veremchuk I, Schnelle W, Burkhardt U, Zhao JT, Grin Y. Synthesis, structure, and properties of two Zintl phases around the composition SrLiAs. Inorg Chem 2013; 52:8971-8. [PMID: 23863037 DOI: 10.1021/ic401166v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two atomic arrangements were found near the equiatomic composition in the strontium-lithium-arsenic system. Orthorhombic o-SrLiAs was synthesized by reaction of elemental components at 950 °C, followed by annealing at 800 °C and subsequent quenching in water. The hexagonal modification h-SrLi(1-x)As was obtained from annealing of o-SrLiAs at 550 °C in dynamic vacuum. The structures of both phases were determined by single-crystal X-ray diffraction: o-SrLiAs, structure type TiNiSi, space group Pnma, Pearson symbol oP12, a = 7.6458(2) Å, b = 4.5158(1) Å, c = 8.0403(3) Å, V = 277.61(2) Å(3), R(F) = 0.028 for 558 reflections; h-SrLi(1-x)As, structure type ZrBeSi, space group P6(3)/mmc, Pearson symbol hP6, a = 4.49277(9) Å, c = 8.0970(3) Å, V = 141.54(1) Å(3), RF = 0.026 for 113 reflections. The analysis of the electron density within the framework of the quantum theory of atoms in molecules revealed a charge transfer according to the Sr(1.3+)Li(0.8+)As(2.1-), in agreement with the electronegativities of the individual elements. The electron localizability indicator distribution indicated the formation of a 3D anionic framework [LiAs] in o-SrLiAs and a rather 2D anionic framework [LiAs] in h-SrLi(1-x)As. Magnetic susceptibility measurements point to a diamagnetic character of both phases, which verifies the calculated electronic density of states.
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Affiliation(s)
- Xian-Juan Feng
- Key Laboratory of Transparent Opto-Functional Inorganic Materials of Chinese Academy of Sciences, Shanghai Institute of Ceramics, Shanghai 200050, China
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