| Project/Area Number |
25420701
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Tohoku University |
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Principal Investigator |
Yamane Hisanori 東北大学, 多元物質科学研究所, 教授 (20191364)
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| Co-Investigator(Renkei-kenkyūsha) |
MORITO Haruhiko 東北大学, 多元物質科学研究所, 助教 (80463800)
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| Research Collaborator |
YAMADA Takahiro 東北大学, 多元物質科学研究所, 准教授 (10358260)
HASHIMOTO Takayuki 東北大学, 多元物質科学研究所, 修士学生
Becker Nils アーヘン工科大学, 博士学生
Dronskowski Richard アーヘン工科大学, 教授
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 窒化物 / 酸窒化物 / ナトリウムフラックス / ジントルポリアニオン / ジントル化合物 / 結晶構造 / 化学結合 / 単結晶X線回折 / 結晶構造解析 / X線結晶構造解析 / 単結晶 |
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| Outline of Final Research Achievements |
Novel compounds, Ba4GaN3O, BaLaSi2, Ba5LaSi6, and Ba26B12Si5N27 were synthesized by the Na flux method. The crystal structure of Ba4GaN3O is isotypic with Sr4GaN3O. BaLaSi2 has cis-trans ∞1[Si] chains. 0[Si6] Zintl polyanion in Ba5LaSi6 is a pentagonal Si ring with a Si-Si stem. The electrical resistivities of BaLaSi2 and Ba5LaSi6 were 0.31 and 0.48 mΩ・cm at 300 K and increased with temperature. The Seebeck coefficients of BaLaSi2 and Ba5LaSi6 were -7.6 μV・K-1 and -11 μV・K-1, respectively, at 296 K. Single crystals of a new quaternary compound, Ba26B12Si5N27, were grown on a BN crucible wall. X-ray diffraction analysis revealed that Ba26B12Si5N27 crystallizes in an orthorhombic cell. Isolated nitridoborate anionic groups [BN2]3-;, dumbbell-type Zintl polyanions [Si2]2.8-, and nitride anions N3- are included in the structure. The [Si2]2.8- dumbbell with a Si-Si length of 2.177(5) Å has a bond order of 2.6, which is close to the triple bond of Si atoms.
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