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Carrillo-Cabrera, Wilder
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Publications (9/9 displayed)
- 2018Local magnetism in MnSiPt rules the chemical bondcitations
- 2013New Monoclinic Phase at the Composition Cu2SnSe3 and Its Thermoelectric Propertiescitations
- 2011Structural relationship between calcite-gelatine composites and biogenic (Human) otoconiacitations
- 2011Nanostructuring of Ba8Ga16Ge30 clathrates
- 2010Crystal structure and transport properties of Ba 8 Ge 43 □ 3citations
- 2010ChemInform Abstract: EuGa2.+-.xGe4.+-.x: Preparation, Crystal Chemistry and Properties.
- 2010ChemInform Abstract: BaGe5: A New Type of Intermetallic Clathrate.
- 2009Hydrogels and aerogels from noble metal nanoparticlescitations
- 2008Electron microscopy study of Mg78.5Pd21.5: a phase with nanothin 120° rotational twin domainscitations
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article
New Monoclinic Phase at the Composition Cu2SnSe3 and Its Thermoelectric Properties
Abstract
A new monoclinic phase (m2) of ternary diamond-like compound Cu2SnSe3 was synthesized by reaction of the elements at 850 K. The crystal structure of m2-Cu2SnSe3 was determined through electron diffraction tomography and refined by full-profile techniques using synchrotron X-ray powder diffraction data (space group Cc, a = 6.9714(2) Å, b = 12.0787(5) Å, c = 13.3935(5) Å, β = 99.865(5)°, Z = 8). Thermal analysis and annealing experiments suggest that m2-Cu2SnSe3 is a low-temperature phase, while the high-temperature phase has a cubic crystal structure. According to quantum chemical calculations, m2-Cu2SnSe3 is a narrow-gap semiconductor. A study of the chemical bonding, applying the electron localizability approach, reveals covalent polar Cu-Se and Sn-Se interactions in the crystal structure. Thermoelectric properties were measured on a specimen consolidated using spark plasma sintering (SPS), confirming the semiconducting character. The thermoelectric figure of merit ZT reaches a maximum value of 0.33 at 650 K.