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Title: Structural characterization and low-temperature physical properties of p-type single-crystal K{sub 8}Ga{sub 8.5}Sn{sub 37.5} grown by self-flux method

Single-crystal K{sub 8}Ga{sub 8.5}Sn{sub 37.5} was synthesized employing a self-flux method where Ga and Sn were used as fluxes. Single-crystal X-ray diffraction analyses revealed that this composition crystallizes in a cubic structure with the Pm3{sup ¯}n space group (number sign 223, a=11.9345(16) Å, V=1699.9(4) Å{sup 3}, Z=1, and R/wR=0.0187/0.0382). A large dynamic disorder and anisotropic atomic displacement parameters were observed for K atoms inside the larger polyhedra in the crystal structure of K{sub 8}Ga{sub 8.5}Sn{sub 37.5}. Electrical properties measurements indicate p-type conduction with onset of minority charge carrier conduction at temperatures above 270 K. - Graphical abstract: Single-crystal K{sub 8}Ga{sub 8.5}Sn{sub 37.5} was synthesized via a double-flux method where Ga and Sn were used as fluxes. Large disorder for K inside the larger polyhedra in the crystal structure of K{sub 8}Ga{sub 8.5}Sn{sub 37.5} was observed. Measurements of the electronic properties indicate p-type conduction with the onset of minority charge carrier conduction at temperatures above 270 K. Highlights: • Single-crystal K{sub 8}Ga{sub 8.5}Sn{sub 37.5} synthesized for the first time, and fully structurally characterized. • Large disorder for K inside the larger polyhedra in the crystal structure of K{sub 8}Ga{sub 8.5}Sn{sub 37.5.} • Electronic properties indicate p-type conduction with relatively low thermalmore » conductivity.« less
Authors:
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Publication Date:
OSTI Identifier:
22274034
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 204; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ANISOTROPY; ATOMIC DISPLACEMENTS; CHARGE CARRIERS; CLATHRATES; CUBIC LATTICES; ELECTRICAL PROPERTIES; MONOCRYSTALS; SPACE GROUPS; THERMAL CONDUCTIVITY; X-RAY DIFFRACTION