著者

興野 純

出版者

The Crystallographic Society of Japan

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.49, no.6, pp.321-327, 2007-12-25 (Released:2010-09-30)

参考文献数

25

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Light-induced phase transformation from realgar to pararealgar has been studied by means of single-crystal X-ray diffraction and X-ray photoelectron spectroscopy. The photochemical degradation causes the increase of As4S4 intermolecular distances and the production of the As4S5 molecules. The results suggest the following cyclic process. 1st : an S atom in the As4S5 is released from one of the As-S-As linkages in As4S5 which becomes the As4S4 pararealgar molecule, 2nd : the free S atom is re-attached to another As4S4 realgar molecule and reproduces an As4S5 molecule, and 3rd : the As4S5 is again divided into an As4S4 pararealgar molecule and an S atom.