Reinvestigation of the low-temperature form of Ag2Se (naumannite) based on single-crystal data

doi:10.1107/S1600536811028534

Acta Crystallogr Sect E Struct Rep Online. 2011 September 1; 67(Pt 9): i45.

Published online 2011 August 2. doi: 10.1107/S1600536811028534

PMCID: PMC3200830

Reinvestigation of the low-temperature form of Ag₂Se (naumannite) based on single-crystal data

Jaemin Yu^a^* and Hoseop Yun^a

^aDivision of Energy Systems Research and Department of Chemistry, Ajou University, Suwon 443-749, Republic of Korea

Correspondence e-mail: hsyun/at/ajou.ac.kr

Received June 26, 2011; Accepted July 15, 2011.

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Abstract

The crystal structure of the low-temperature form of synthetic naumannite [disilver(I) selenide], Ag₂Se, has been reinvestigated based on single-crystal data. In comparison with previous powder diffraction studies, anisotropic displacement parameters are additionally reported. The structure is composed of Se layers and two crystallographically independent Ag atoms. One Ag atom lies close to the Se layer and is surrounded by four Se atoms in a distorted tetrahedral coordination, while the second Ag atom lies between the Se layers and exhibits a [3 + 1] coordination defined by three close Se atoms, forming a trigonal plane, and one remote Se atom.

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