Explore new suboxide and subnitride by the flux method

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02794
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
• Research Institution: Tohoku University
• Principal Investigator: Yamane Hisanori 東北大学, 多元物質科学研究所, 教授 (20191364)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 新物質探査 / 亜酸化物 / 亜窒化物 / フラックス法 / X線結晶構造解析 / 導電率 / 化学結合

Outline of Final Research Achievements

New suboxide Ti6Sn5O0.9 and subnitride Sr7N2Sn3 were synthesized in single crystal forms using low temperature metal fluxes of Sn and Na, respectively. The crystal structures were determined by single crystal X-ray diffraction. O atoms are situated at the center of the Ti tethrahedra in the structure of Ti6Sn5O0.9. Metallic electrical conduction of Ti6Sn5O0.9 was demonstrated. Sr7N2Sn3 is the first subnitrde with a structure related to the antistructure of Ca2NbO7-type layered perovskite structure. Polyanions of [Sn4] which consists of four Sn atoms with a zigzag arrangement are intervened between the four layers of anti-perovskite unit [Sn2N4Sr14].

Free Research Field

無機固体化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、低融点金属をフラックスとして用いることにより、これまでに報告のない結晶構造を有する亜酸化物や亜窒化物が合成され、その過程で新規の酸化物も見出された。それらの結晶構造の特徴や電気的性質が明らかにされた。これらの研究成果は、無機固体化学、結晶構造化学、無機材料科学の学術的発展に貢献するものであり、新規化合物の情報は貴重な文化遺産となる。