X-Ray Study of the Room Temperature Structure in Monoclinic TlS
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概要
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TlS is known as a mixed valence compound containing monovalent and trivalent thallium ions. The structure of the newly found monoclinic TlS has been analyzed using three-dimensional single crystal diffraction data. Space group C2: <I>a</I>=11.018(6), <I>b</I>=11.039(15), <I>c</I>=60.16(7) Å, β=100.69°(4) and <I>Z</I>=128. The structure is characterized by layers formed of corner-connected Tl<SUP>+3</SUP>S<SUB>4</SUB> tetrahedra. Monovalent Tl<SUP>1+</SUP> ions are located between the layers and have trigonal prismatic coordination of the sulfur ions. The structure is a variation of the TlGaSe<SUB>2</SUB> type with fourfold modulation along the <I>c</I>-axis. The modulation is caused by cooperative distortion of trigonal prisms around the monovalent Tl<SUP>1+</SUP> ions.
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社団法人 日本物理学会 | 論文
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