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Synthesis and Crystal Structure of Suboxide Solid Solutions, Ti12−δGaxBi3–xO10
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-09-15 00:00:00 , DOI: 10.1021/acs.inorgchem.7b01538 Shinsaku Amano 1 , Hisanori Yamane 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-09-15 00:00:00 , DOI: 10.1021/acs.inorgchem.7b01538 Shinsaku Amano 1 , Hisanori Yamane 1
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Single crystals of suboxide solid solutions Ti12−δGaxBi3–xO10 (x = 1.42–1.74; δ = 0.77–0.62) were prepared at 900 °C with a Bi flux. Crystal structure analysis by X-ray diffraction (XRD) revealed that the solid solutions are isostructural with Ti12−δSn3O10 (cubic, space group Fm3̅m). The cell parameter a decreases from 13.5616(3) to 13.5402(5) Å with increasing Ga content, x, while the total valence electron number of Ti12−δGaxBi3–xO10 is maintained at 117.1 by decreasing Ti defects, δ. Stella octangula is formed by sharing of the edges of four supertetrahedra composed of O-centered Ti tetrahedra and trigonal bipyramids (oxide part). Another superpolyhedron is formed by sharing of the pyramidal planes of Ga/Bi-centered, Ti-monocapped square antiprisms (intermetallic part). These two parts are incorporated in the structure. A polycrystalline bulk of a solid solution with x = 2.01 and δ = 0.67 [a = 13.53772(13) Å] was synthesized by reaction sintering at 950 °C from a mixture of Ti, TiO2, Bi2O3, and Ga2O3. The resistivities measured for the bulk were (2.2–2.4) × 10–5 Ω m in the temperature range from 10 to 300 K.
中文翻译：
低氧化物固溶体的合成和晶体结构，钛12-δ嘎X的Bi 3- X Ô 10
低氧化物固溶体的Ti单晶12-δ嘎X的Bi 3- X ø 10（X在900制备℃下用双通量;δ= 0.77-0.62 = 1.42-1.74）。通过X射线衍射（XRD）的晶体结构分析表明，该固体溶液是同结构的Ti 12-δ Sn的3 ö 10（立方，空间群FM 3米）。参数的单元格一个减小从13.5616（3）至13.5402（5）随着Ga含量，X，而将Ti的总化合价电子数12-δ嘎X的Bi 3- X通过降低Ti缺陷δ将O 10维持在117.1。Stella octangula通过共享四个以O为中心的Ti四面体和三角双锥体（氧化物部分）组成的supertetrahedra的边缘而形成。另一个超级多面体是通过共享Ga / Bi中心的，Ti族的方形反棱镜（金属间部分）的金字塔平面而形成的。这两个部分合并在结构中。通过在950°C下从Ti，TiO 2，Bi 2 O 3和Ga 2的混合物中进行反应烧结，合成了x = 2.01和δ= 0.67 [ a = 13.53772（13）Å]的固溶多晶块。Ø 3。为批量测量的电阻率分别为（2.2-2.4）×10 -5 Ω的温度范围从10至300 K.米
更新日期：2017-09-15
中文翻译：
低氧化物固溶体的合成和晶体结构，钛12-δ嘎X的Bi 3- X Ô 10
低氧化物固溶体的Ti单晶12-δ嘎X的Bi 3- X ø 10（X在900制备℃下用双通量;δ= 0.77-0.62 = 1.42-1.74）。通过X射线衍射（XRD）的晶体结构分析表明，该固体溶液是同结构的Ti 12-δ Sn的3 ö 10（立方，空间群FM 3米）。参数的单元格一个减小从13.5616（3）至13.5402（5）随着Ga含量，X，而将Ti的总化合价电子数12-δ嘎X的Bi 3- X通过降低Ti缺陷δ将O 10维持在117.1。Stella octangula通过共享四个以O为中心的Ti四面体和三角双锥体（氧化物部分）组成的supertetrahedra的边缘而形成。另一个超级多面体是通过共享Ga / Bi中心的，Ti族的方形反棱镜（金属间部分）的金字塔平面而形成的。这两个部分合并在结构中。通过在950°C下从Ti，TiO 2，Bi 2 O 3和Ga 2的混合物中进行反应烧结，合成了x = 2.01和δ= 0.67 [ a = 13.53772（13）Å]的固溶多晶块。Ø 3。为批量测量的电阻率分别为（2.2-2.4）×10 -5 Ω的温度范围从10至300 K.米
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