Evidence of the existence of the As<sub>4</sub>S<sub>6</sub> molecule produced by light exposure of alacranite, As<sub>8</sub>S<sub>9</sub>

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Abstract 4 S6 molecule, although theoretically predicted and supposed to occur in amorphous arsenic sulfides, was missing in the reported structures of crystalline As chalcogenides; the thermodynamic stable phase for this stoichiometry, in fact, is that of the mineral orpiment, which shows a layered structural arrangement based on trigonal AsS3 pyramids. Here we report the first possible occurrence of the As4 S6 molecule together with the other known As4 Sn (n = 3, 4, 5) molecules randomly replacing each other in the crystalline structure of a new monoclinic product obtained by the light-induced alteration of the mineral alacranite, As8 S9. Our findings are based on single-crystal X-ray diffraction experiments. The fact that As4 S6 formed in a crystalline light-induced alteration product could indicate a heretofore unknown role of this molecule in the photoinduced changes of the physico-chemical properties of both bulk glasses and thin films in the As–S system, widely studied in optics and optoelectronics.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Evidence of the existence of the As4S6 molecule produced by light exposure of alacranite, As8S9 ; volume:36 ; number:4 ; year:2024 ; pages:615-622 ; extent:8
European journal of mineralogy ; 36, Heft 4 (2024), 615-622 (gesamt 8)

Klassifikation
Fotografie, Computerkunst

Urheber
Bindi, Luca
Bonazzi, Paola
Chelazzi, Laura
Franceschini, Matteo M. N.
Lepore, Giovanni O.
Morana, Marta
Pratesi, Giovanni
Taddei, Alice
Zoppi, Matteo
Menchetti, Silvio

DOI
10.5194/ejm-36-615-2024
URN
urn:nbn:de:101:1-2501090909063.123101493102
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:23 MESZ

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Beteiligte

  • Bindi, Luca
  • Bonazzi, Paola
  • Chelazzi, Laura
  • Franceschini, Matteo M. N.
  • Lepore, Giovanni O.
  • Morana, Marta
  • Pratesi, Giovanni
  • Taddei, Alice
  • Zoppi, Matteo
  • Menchetti, Silvio

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Sub, sub, söt

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