Open AccessThe growth and crystallography of bismuth tri-iodide crystals grown by vapor transport
Author(s) -
D. Nason,
Ludwig Keller
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/105857
Subject(s) - sublimation (psychology) , bismuth , stoichiometry , iodide , crystallography , materials science , crystal growth , vapor phase , analytical chemistry (journal) , crystal (programming language) , chemistry , inorganic chemistry , thermodynamics , psychology , physics , chromatography , computer science , programming language , metallurgy , psychotherapist
A single crystal of bismuth tri-iodide (BiI{sub 3}) of dimensions 1.2 {times} 1.2 {times} 0.4 cm{sup 3} has been grown by physical vapor transport. The lattice parameters of the hexagonal crystal and its polycrystaleme powder precursor were measured by x-ray diffraction (XRD) and were in agreement, indicating that the vapor phase growth and sublimation purification processing at temperatures below 330{degree}C did not significantly affect the stoichiometry. X-ray rocking measurements of the single crystal showed low angle boundaries of the order of 0.05{degree}. In tests as gamma radiation detectors, neither melt grown nor vapor grown crystals were satisfactory, but the vapor grown crystals were promising. Several observations suggest that better performance may be achievable with purer bismuth tri-iodide