A novel two-dimensional mercury antimony telluride: low temperature synthesis and characterization of RbHgSbTe3
1997; Elsevier BV; Volume: 262-263; Linguagem: Inglês
10.1016/s0925-8388(97)00324-1
ISSN1873-4669
AutoresJing Li, Zhen Chen, Xunxie Wang, Davide Μ. Proserpio,
Tópico(s)Solid-state spectroscopy and crystallography
ResumoRbHgSbTe3 (I), a novel two-dimensional quaternary mercury antimony telluride, was synthesized via an unconventional low-temparature route, Single crystals of I were grown at 180°C from solvothermal reactions using ethylenediamine as solvent. The crystal structure of I was determined by X-ray diffraction methods. The structure belongs to the orthorhombic crystal system, space group Cmem (no. 63). a = 4,590 (2) Å, b = 15.745 (4) Å, c = 11.737 (2) Å, Z = 4. The crystal structure of this compound consists of two-dimensional layers of ∗2[HgSbTe3=] with Rb∗ counterions located between the layers. Optical studies performed on the powder samples of I suggested that the compound is a narrow-gap semiconductor. A band-gap of 0.2 eV was estimated from its diffuse reflectance spectrum.
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