Английская Википедия:Dimorphite

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Шаблон:Infobox mineral Dimorphite, chemical name arsenic sesquisulfide (As4S3), is a very rare orange-yellow arsenic sulfide mineral. In nature, dimorphite forms primarily by deposition in volcanic fumaroles at temperatures of 70–80 °C (158–176 °F). Dimorphite was first discovered in such a fumarole near Naples, Italy in 1849 by the mineralogist Arcangelo Scacchi (1810–1893).[1] Since its discovery, dimorphite has been found in the Alacrán silver mine near Copiapó, Chile.[2] It has also been reported from Cerro de Pasco, Peru, and the Lavrion District Mines in Attica, Greece.[3]

Properties and applications

Dimorphite has two crystal forms, Α- and Β-. This property gives rise to its name, which comes from the Greek for "two" and "form." Dimorphite transitions between its α- and β- forms at around 130 °C (266 °F).[4]

Dimorphite can be synthesized by melting arsenic and sulfur together in the proper molar ratios in vacuum.[4]

Initial research indicates the possibility of using synthetic dimorphite in the development of gas sensors,[5][6] due to the semiconductive properties of dimorphite.

References

Шаблон:Reflist

  1. Guarini G, Palmieri L, Scacchi A (1855) Chapter 5. Esame mineralogico-chimico delle produzioni dell'incendio, in Memoria sullo Incendio Vesuviano, Gaetano Nobile (Napoli) p. 165-200
  2. Ошибка цитирования Неверный тег <ref>; для сносок Handbook не указан текст
  3. Ошибка цитирования Неверный тег <ref>; для сносок Mindat не указан текст
  4. 4,0 4,1 Wiberg, Egon, Nils Wiberg, and Arnold Frederick Holleman. Inorganic Chemistry. San Diego: Academic Press, 2001.
  5. Шаблон:Cite journal
  6. Шаблон:Cite journal