Chemical vapour transport of pyrite (FeS2) with halogen (Cl, Br, I)

S. Fiechter, J. Mai, A. Ennaoui, W. Szacki

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

A systematic study of chemical vapour transport (CVT) of pyrite with halogen, hydrogen halides and ammonium halides as transporting agents has shown that the transport with chlorine and bromine in a temperature gradient ΔT = 920-820 K yields the highest transport rates (∼6 mg/h) with crystals up to 5 mm edge length. Computing thermochemical equilibria and flux functions in the system Fe-S-Hal (Hal = Cl, Br, I) it has been confirmed that the transport velocity of pyrite is limited by the concentration of FeHal2 in the vapour phase, the equilibrium position between FeHal2(g) and FeHal3(g) and the flux directions of the iron gas species.

Original languageEnglish
Pages (from-to)438-444
Number of pages7
JournalJournal of Crystal Growth
Volume78
Issue number3
DOIs
Publication statusPublished - 1 Dec 1986
Externally publishedYes

Fingerprint

Halogens
Pyrites
pyrites
halogens
halides
Vapors
vapors
Fluxes
Bromine
Chlorine
bromine
Ammonium Compounds
Thermal gradients
chlorine
Hydrogen
temperature gradients
Iron
Gases
vapor phases
iron

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Chemical vapour transport of pyrite (FeS2) with halogen (Cl, Br, I). / Fiechter, S.; Mai, J.; Ennaoui, A.; Szacki, W.

In: Journal of Crystal Growth, Vol. 78, No. 3, 01.12.1986, p. 438-444.

Research output: Contribution to journalArticle

Fiechter, S. ; Mai, J. ; Ennaoui, A. ; Szacki, W. / Chemical vapour transport of pyrite (FeS2) with halogen (Cl, Br, I). In: Journal of Crystal Growth. 1986 ; Vol. 78, No. 3. pp. 438-444.
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