Abstract
Abstract Fe2SnSe4 belongs to the adamantine family of quaternary chalcogenides crystallizing in the olivine type structure, which can be described from a hexagonal close-packing of selenium anions with the octahedral and tetrahedral sites occupied by the iron and tin cations, respectively. The structural characterization of the sample, synthesized by the melt and annealing technique, was carried out by powder X-ray diffraction at room temperature. The XRD data analysis shows, that Fe2SnSe4 adopt the orthorhombic olivine type structure, space group Pnma, and unit cell parameters a = 13.2019(3) A, b = 7.6746(1) A, c = 6.3572(1) A, V = 644.11(2) A3 were derived.
Highlights
The ternary chalcogenide semiconductors AII2-BIVXVI4 (II= Mn, Fe, Co; IV= Si, Ge, Sn; VI= S, Se, Te) have drawn wide interest for their magnetic, optoelectronic and thermoelectric properties[1,2,3,4,5,6,7,8,9,10,11,12]
In the hope of providing a full description of the Fe2SnSe4 structure, in the present work, and as part of ongoing crystal structural studies on chalcogenide compounds[22,23,24,25,26,27], we report the structural characterization of this ternary compound using powder X-ray diffraction techniques
Systematic absences indicate a P-type cell, which suggested along with the sample composition and cell parameter dimensions that this material is isostructural with the olivine type compounds with orthorhombic space group Pnma (N° 62) as the recently reported compound Mn2SnSe4 [27]
Summary
The ternary chalcogenide semiconductors AII2-BIVXVI4 (II= Mn, Fe, Co; IV= Si, Ge, Sn; VI= S, Se, Te) have drawn wide interest for their magnetic, optoelectronic and thermoelectric properties[1,2,3,4,5,6,7,8,9,10,11,12]. The presence of transition metal and chalcogenide elements in the same compound enables unique interaction between the electron spins, which is one of the factors that give rise to potential applications[13] These type of materials generally belongs to the adamantine family of ternary chalcogenide crystallizing in the olivine type structure[1] with the anions forming a hexagonal close packing and the cations in tetrahedral and octahedral coordination. From the point of view of their magnetic structure and properties, the chalcogenide olivines represent interesting examples of frustrated lattices of magnetic atoms determining complex magnetic excitations[14] Materials belonging to this family of olivine-type compounds have been considered as good model systems to study multicritical phenomena[15], and have found important new applications for thermoelectric power generation[8], and as cathode materials for batteries[16]. In the hope of providing a full description of the Fe2SnSe4 structure, in the present work, and as part of ongoing crystal structural studies on chalcogenide compounds[22,23,24,25,26,27], we report the structural characterization of this ternary compound using powder X-ray diffraction techniques
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