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Blatova OA, Osipov VT, Pavlova VE, Solodovnikova MA, Trofimychev II, Egorova EM, Blatov VA. Local Atomic Configurations in Intermetallic Crystals: Beyond the First Coordination Shell. Inorg Chem 2023; 62:6214-6223. [PMID: 37043820 DOI: 10.1021/acs.inorgchem.2c03607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
We have used a combined geometrical-topological approach to analyze 21,697 intermetallic crystal structures stored in the Inorganic Crystal Structure Database. Following a geometrical scheme of close packing of balls, we have considered the three most typical polyhedral atomic environments of the icosahedral, cuboctahedral, or twinned cuboctahedral shape as well as multi-shell (up to four shells) local atomic configurations (LACs) based on these cores in 10,657 unique crystal structure determinations. In total, half of intermetallic structures have been found to contain one of these configurations, with the icosahedral LACs being the most frequent. We have revealed that even a two-shell configuration strongly predetermines the overall connectivity (topological type) of an intermetallic crystal structure. The chemical and stoichiometric composition of the multi-shell LACs generally obeys the close-packing model: the number of atoms in the subsequent shells (Nk) varies around the value Nk = 10k2 + 2, which is valid for the same size atoms, to reach the densest packing for the kth shell. Deviations from the revealed regularities often indicate inconsistencies in the crystallographic information, unusual features of the structure, or the existence of more stable phases that can be used for the validation of experimental and modeling data.
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Affiliation(s)
- Olga A Blatova
- SCTMS, Samara State Technical University, Samara 443100, Russian Federation
| | - Vladislav T Osipov
- SCTMS, Samara State Technical University, Samara 443100, Russian Federation
| | - Valeria E Pavlova
- SCTMS, Samara State Technical University, Samara 443100, Russian Federation
| | | | - Ilya I Trofimychev
- SCTMS, Samara State Technical University, Samara 443100, Russian Federation
| | | | - Vladislav A Blatov
- SCTMS, Samara State Technical University, Samara 443100, Russian Federation
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Li F, Zhang X, Fu Y, Wang Y, Bergara A, Yang G. Ba with Unusual Oxidation States in Ba Chalcogenides under Pressure. J Phys Chem Lett 2021; 12:4203-4210. [PMID: 33900760 DOI: 10.1021/acs.jpclett.1c00994] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The preparation of compounds with novel atomic oxidation states and emergent properties is of fundamental interest in chemistry. As s-block elements, alkali-earth metals invariably show a +2 formal oxidation state at normal conditions, and among them, barium (Ba) presents the strongest chemical reactivity. Herein, we propose that novel valence states of Ba can be achieved in pressure-induced chalcogenides, where it also shows a feature of 5d-elements. First-principles swarm-intelligence structural search calculations identify three novel stoichiometric compounds: BaCh4 (Ch = O, S) containing Ba2+, Ba3Ch2 (Ch = S, Se, Te) with Ba+ and Ba2+, and Ba2Ch (Ch = Se, Te) with Ba+ cations. The pressure-induced drop of the Ba 5d level relative to Ba 6s is responsible for this unusual oxidation state. These compounds display captivating structural characters, such as Ba-centered polyhedra and chain-shaped Ch units. More interestingly still, the interaction between two Ba+ ions ensures their structural stability.
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Affiliation(s)
- Fei Li
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Xiaohua Zhang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Yang Fu
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
| | - Yanchao Wang
- International Center of Computational Method and Software, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
| | - Aitor Bergara
- Departamento de Física, Universidad del País Vasco-Euskal Herriko Unibertsitatea, UPV/EHU, 48080 Bilbao, Spain
- Donostia International Physics Center (DIPC), 20018 Donostia, Spain
- Centro de Física de Materiales CFM, Centro Mixto CSIC-UPV/EHU, 20018 Donostia, Spain
| | - Guochun Yang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
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3
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Lotfi S, Brgoch J. Discovering Intermetallics Through Synthesis, Computation, and Data‐Driven Analysis. Chemistry 2020; 26:8689-8697. [DOI: 10.1002/chem.202000742] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Sogol Lotfi
- Department of ChemistryUniversity of Houston Houston Texas 77204 USA
| | - Jakoah Brgoch
- Department of ChemistryUniversity of Houston Houston Texas 77204 USA
- Texas Center for Superconductivity, Houston 77204 Texas USA
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Zagorac D, Müller H, Ruehl S, Zagorac J, Rehme S. Recent developments in the Inorganic Crystal Structure Database: theoretical crystal structure data and related features. J Appl Crystallogr 2019; 52:918-925. [PMID: 31636516 PMCID: PMC6782081 DOI: 10.1107/s160057671900997x] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/12/2019] [Indexed: 11/12/2022] Open
Abstract
The article discusses how theoretical crystal data are supplementing experimental data for simulation and prediction of structures of inorganic solids in the Inorganic Crystal Structure Database. The Inorganic Crystal Structure Database (ICSD) is the world’s largest database of fully evaluated and published crystal structure data, mostly obtained from experimental results. However, the purely experimental approach is no longer the only route to discover new compounds and structures. In the past few decades, numerous computational methods for simulating and predicting structures of inorganic solids have emerged, creating large numbers of theoretical crystal data. In order to take account of these new developments the scope of the ICSD was extended in 2017 to include theoretical structures which are published in peer-reviewed journals. Each theoretical structure has been carefully evaluated, and the resulting CIF has been extended and standardized. Furthermore, a first classification of theoretical data in the ICSD is presented, including additional categories used for comparison of experimental and theoretical information.
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Affiliation(s)
- D Zagorac
- Technicum Scientific Publishing, Stuttgart, Germany.,Institute of Nuclear Sciences Vinča, Materials Science Laboratory, Belgrade University, Belgrade, Serbia
| | - H Müller
- FIZ Karlsruhe - Leibniz Institute for Information Infrastructure, Karlsruhe, Germany
| | - S Ruehl
- FIZ Karlsruhe - Leibniz Institute for Information Infrastructure, Karlsruhe, Germany
| | - J Zagorac
- Technicum Scientific Publishing, Stuttgart, Germany.,Institute of Nuclear Sciences Vinča, Materials Science Laboratory, Belgrade University, Belgrade, Serbia
| | - S Rehme
- FIZ Karlsruhe - Leibniz Institute for Information Infrastructure, Karlsruhe, Germany
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5
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Characteristics of the s–Wave Symmetry Superconducting State in the BaGe3 Compound. Symmetry (Basel) 2019. [DOI: 10.3390/sym11080977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Thermodynamic properties of the s–wave symmetry superconducting phase in three selected structures of the BaGe 3 compound ( P 6 3 / m m c , A m m 2 , and I 4 / m m m ) were discussed in the context of DFT results obtained for the Eliashberg function. This compound may enable the implementation of systems for quantum information processing. Calculations were carried out within the Eliashberg formalism due to the fact that the electron–phonon coupling constant falls within the range λ ∈ 0 . 73 , 0 . 86 . The value of the Coulomb pseudopotential was assumed to be 0 . 122 , in accordance with the experimental results. The value of the Coulomb pseudopotential was assumed to be 0 . 122 , in accordance with the experimental results. The existence of the superconducting state of three different critical temperature values, namely, 4 . 0 K, 4 . 5 K and 5 . 5 K, depending on the considered structure, was stated. We determined the differences in free energy ( Δ F ) and specific heat ( Δ C ) between the normal and the superconducting states, as well as the thermodynamic critical field ( H c ) as a function of temperature. A drop in the H c value to zero at the temperature of 4.0 K was observed for the P 6 3 / m m c structure, which is in good accordance with the experimental data. Further, the values of the dimensionless thermodynamic parameters of the superconducting state were estimated as: R Δ = 2 Δ ( 0 ) / k B T c ∈ { 3 . 68 , 3 . 8 , 3 . 8 } , R C = Δ C ( T c ) / C N ( T c ) ∈ { 1 . 55 , 1 . 71 , 1 . 75 } , and R H = T c C N ( T c ) / H c 2 ( 0 ) ∈ { 0 . 168 , 0 . 16 , 0 . 158 } , which are slightly different from the predictions of the Bardeen–Cooper–Schrieffer theory ( [ R Δ ] B C S = 3 . 53 , [ R C ] B C S = 1 . 43 , and [ R H ] B C S = 0 . 168 ). This is caused by the occurrence of small retardation and strong coupling effects.
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Ryan K, Lengyel J, Shatruk M. Crystal Structure Prediction via Deep Learning. J Am Chem Soc 2018; 140:10158-10168. [DOI: 10.1021/jacs.8b03913] [Citation(s) in RCA: 185] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kevin Ryan
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Jeff Lengyel
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Michael Shatruk
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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Stefanoski S, Finkelstein GJ, Ward MD, Zeng T, Wei K, Bullock ES, Beavers CM, Liu H, Nolas GS, Strobel TA. Zintl Ions within Framework Channels: The Complex Structure and Low-Temperature Transport Properties of Na 4Ge 13. Inorg Chem 2018; 57:2002-2012. [PMID: 29400457 DOI: 10.1021/acs.inorgchem.7b02914] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Single crystals of a complex Zintl compound with the composition Na4Ge13 were synthesized for the first time using a high-pressure/high-temperature approach. Single-crystal diffraction of synchrotron radiation revealed a hexagonal crystal structure with P6/m space group symmetry that is composed of a three-dimensional sp3 Ge framework punctuated by small and large channels along the crystallographic c axis. Na atoms are inside hexagonal prism-based Ge cages along the small channels, while the larger channels are occupied by layers of disordered sixfold Na rings, which are in turn filled by disordered [Ge4]4- tetrahedra. This compound is the same as "Na1-xGe3+z" reported previously, but the availability of single crystals allowed for more complete structural determination with a formula unit best described as Na4Ge12(Ge4)0.25. The compound is the first known example of a guest-host structure where discrete Zintl polyanions are confined inside the channels of a three-dimensional covalent framework. These features give rise to temperature-dependent disorder, as confirmed by first-principles calculations and physical properties measurements. The availability of single-crystal specimens allowed for measurement of the intrinsic low-temperature transport properties of this material and revealed its semiconductor behavior, which was corroborated by theoretical calculations.
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Affiliation(s)
- Stevce Stefanoski
- Geophysical Laboratory, Carnegie Institution of Washington , Washington, D.C. 20015, United States.,Department of Physics, Benedictine University , Lisle, Illinois 60532, United States
| | - Gregory J Finkelstein
- Seismological Laboratory, California Institute of Technology , Pasadena, California 91125, United States
| | - Matthew D Ward
- Geophysical Laboratory, Carnegie Institution of Washington , Washington, D.C. 20015, United States
| | - Tao Zeng
- Department of Chemistry, Carleton University , Ottawa, ON K1S5B6, Canada
| | - Kaya Wei
- Department of Physics, University of South Florida , Tampa, Florida 33620, United States
| | - Emma S Bullock
- Geophysical Laboratory, Carnegie Institution of Washington , Washington, D.C. 20015, United States
| | - Christine M Beavers
- Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.,Department of Earth and Planetary Sciences, University of California Santa Cruz , Santa Cruz, California 95064, United States
| | - Hanyu Liu
- Geophysical Laboratory, Carnegie Institution of Washington , Washington, D.C. 20015, United States
| | - George S Nolas
- Department of Physics, University of South Florida , Tampa, Florida 33620, United States
| | - Timothy A Strobel
- Geophysical Laboratory, Carnegie Institution of Washington , Washington, D.C. 20015, United States
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Abstract
Metal ions play significant roles in numerous fields including chemistry, geochemistry, biochemistry, and materials science. With computational tools increasingly becoming important in chemical research, methods have emerged to effectively face the challenge of modeling metal ions in the gas, aqueous, and solid phases. Herein, we review both quantum and classical modeling strategies for metal ion-containing systems that have been developed over the past few decades. This Review focuses on classical metal ion modeling based on unpolarized models (including the nonbonded, bonded, cationic dummy atom, and combined models), polarizable models (e.g., the fluctuating charge, Drude oscillator, and the induced dipole models), the angular overlap model, and valence bond-based models. Quantum mechanical studies of metal ion-containing systems at the semiempirical, ab initio, and density functional levels of theory are reviewed as well with a particular focus on how these methods inform classical modeling efforts. Finally, conclusions and future prospects and directions are offered that will further enhance the classical modeling of metal ion-containing systems.
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Affiliation(s)
| | - Kenneth M. Merz
- Department of Chemistry, Department of Biochemistry and Molecular Biology, and Institute of Cyber-Enabled Research, Michigan State University, East Lansing, Michigan 48824, United States
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Castillo R, Baranov AI, Burkhardt U, Cardoso-Gil R, Schnelle W, Bobnar M, Schwarz U. Germanium Dumbbells in a New Superconducting Modification of BaGe3. Inorg Chem 2016; 55:4498-503. [PMID: 27064595 DOI: 10.1021/acs.inorgchem.6b00299] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the high-pressure high-temperature synthesis (P = 15 GPa, T = 1300 K) of BaGe3(tI32) adopting a CaGe3-type crystal structure. Bonding analysis reveals layers of covalently bonded germanium dumbbells being involved in multicenter Ba-Ge interactions. Physical measurements evidence metal-type electrical conductivity and a transition to a superconducting state at 6.5 K. Chemical bonding and physical properties of the new modification are discussed in comparison to the earlier described hexagonal form BaGe3(hP8) with a columnar arrangement of Ge3 triangles.
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Affiliation(s)
- Rodrigo Castillo
- Max-Planck-Institut für Chemische Physik fester Stoffe , Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Alexey I Baranov
- 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
| | - Raul Cardoso-Gil
- Max-Planck-Institut für Chemische Physik fester Stoffe , Nöthnitzer Straße 40, 01187 Dresden, Germany
| | - Walter Schnelle
- 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
| | - Ulrich Schwarz
- Max-Planck-Institut für Chemische Physik fester Stoffe , Nöthnitzer Straße 40, 01187 Dresden, Germany
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Terpstra T, Hooper J, Zurek E. First principles investigation on how site preference and entropy affect the stability of (EuxM1–x)2Ge2Pb (M = Ca, Sr, Ba) polar intermetallics. CAN J CHEM 2016. [DOI: 10.1139/cjc-2015-0374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Density functional theory calculations have been carried out to analyze the factors contributing to the stabilities of a set of recently synthesized quaternary polar intermetallic compounds, (EuxM1–x)2Ge2Pb with M = Ca, Sr, and Ba. Experiments showed that these preferentially crystallized with Pbam (M = Ca) or Cmmm (M = Sr, Ba) symmetry. We systematically explored how the electronic energies of these structures depended on how they were “colored” by the europium/M ions for a wide composition range. It was found that whereas there was very little site preference in the Cmmm structure, the “B” site in the Pbam structure strongly preferred smaller cations. The configurational entropy was also found to play a role in determining which structures might be preferred. However, the experimentally obtained product ratios could only be fully rationalized by the Gibbs free energies of structures containing M:Eu ratios resembling those that were synthesized experimentally. Our results highlight the importance of calculating vibrational contributions to the entropy for realistic structure models (in terms of coloring and composition) to explain product ratios for syntheses carried out at high temperatures.
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Affiliation(s)
- Tyson Terpstra
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
| | - James Hooper
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
- Department of Theoretical Chemistry, Jagiellonian University, R. Ingardena 3, 30-060 Krakow, Poland
| | - Eva Zurek
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
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He HM, Li Y, Sun WM, Wang JJ, Wu D, Zhong RL, Zhou ZJ, Li ZR. All-metal electride molecules CuAg@Ca7M (M = Be, Mg, and Ca) with multi-excess electrons and all-metal polyanions: molecular structures and bonding modes as well as large infrared nonlinear optical responses. Dalton Trans 2016; 45:2656-65. [DOI: 10.1039/c5dt04530d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
All-metal electride molecules, CuAg@Ca7M (M = Be, Mg and Ca), have been designed and researched in theory for the first time.
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Affiliation(s)
- Hui-Min He
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
- P. R. China
| | - Ying Li
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
- P. R. China
| | - Wei-Ming Sun
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
- P. R. China
- Department of Basic Chemistry
| | - Jia-Jun Wang
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
- P. R. China
- Key Laboratory of Preparation and Application of Environmental Friendly Materials
| | - Di Wu
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
- P. R. China
| | - Rong-Lin Zhong
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
- P. R. China
| | - Zhong-Jun Zhou
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
- P. R. China
| | - Zhi-Ru Li
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
- P. R. China
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Nishikawa T, Fukuoka H, Inumaru K. High-Pressure Synthesis and Electronic Structure of a New Superconducting Strontium Germanide (SrGe3) Containing Ge2 Dumbbells. Inorg Chem 2015; 54:7433-7. [PMID: 26171709 DOI: 10.1021/acs.inorgchem.5b00989] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We obtained a new strontium germanide (SrGe3) by high-pressure and high-temperature synthesis. It was prepared at 13 GPa and 1100 °C. The space group and cell constants are I4/mmm (No. 139), a = 7.7800(8) Å, c = 12.0561(13) Å, and V = 729.74(17) Å(3). SrGe3 crystallizes in the CaSi3 structure composed of Ge-Ge dumbbells and Sr(2+) ions. SrGe3 is a type II superconductor with a transition temperature of 6.0 K.
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Affiliation(s)
- Takuya Nishikawa
- †Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Hiroshi Fukuoka
- †Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Kei Inumaru
- †Department of Applied Chemistry, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
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