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Polymorphism and optical properties in [NH4][InSe2]
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Ewing, Sarah J., Woodward, David I., Powell, Anthony V. and Vaqueiro, Paz (2013) Polymorphism and optical properties in [NH4][InSe2]. Journal of Solid State Chemistry, Volume 204 . pp. 159-165. doi:10.1016/j.jssc.2013.05.033 ISSN 0022-4596.
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Official URL: http://dx.doi.org/10.1016/j.jssc.2013.05.033
Abstract
The solvothermal synthesis and characterization of two indium selenides with stoichiometry [NH4][InSe2] is described. Yellow [NH4][InSe2] (1), which exhibits a layered structure, was initially prepared in an aqueous solution of trans-1,4-diaminocyclohexane, and subsequently using a concentrated ammonia solution. A red polymorph of one-dimensional character, [NH4][InSe2] (2), was obtained using 3,5-dimethylpyridine as solvent. [NH4][InSe2] (1) crystallizes in the non-centrosymmetric space group Cc (a=11.5147(6), b=11.3242(6), c=15.9969(9) Å and β=100.354(3)°). The structural motif of the layers is the In4Se10 adamantane unit, composed of four corner-linked InSe4 tetrahedra. These units are linked by their corners, forming [InSe2]− layers which are stacked back to back along the c-direction, and interspaced by [NH4]+cations. The one-dimensional polymorph, (2), crystallizes in the tetragonal space group, I4/mcm (a=8.2519(16), c=6.9059 (14) Å). This structure contains infinite chains of edge-sharing InSe4 tetrahedra separated by [NH4]+ cations.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Journal of Solid State Chemistry | ||||
Publisher: | Academic Press | ||||
ISSN: | 0022-4596 | ||||
Official Date: | August 2013 | ||||
Dates: |
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Volume: | Volume 204 | ||||
Page Range: | pp. 159-165 | ||||
DOI: | 10.1016/j.jssc.2013.05.033 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published |
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