Sign on

SAO/NASA ADS Physics Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· References in the article
· Citations to the Article (1) (Citation History)
· Refereed Citations to the Article
·
· Translate This Page
Title:
Thermodynamics of the xanthoconite-proustite and pyrostilpnite-pyrargyrite phase transition as determined by abrasive stripping voltammetry
Authors:
Lange, Birgit; Scholz, Fritz; Bautsch, Hans-Joachim; Damaschun, Ferdinand; Wappler, Gert
Affiliation:
AA(Humboldt-Universität, Fachbereich Chemie, Institut für Analytische Chemie), AB(Humboldt-Universität, Fachbereich Chemie, Institut für Analytische Chemie), AC(Humboldt-Universität, Museum für Naturkunde, Mineralogisch-Petrographisches Institut und Museum), AD(Humboldt-Universität, Museum für Naturkunde, Mineralogisch-Petrographisches Institut und Museum), AE(Humboldt-Universität, Museum für Naturkunde, Mineralogisch-Petrographisches Institut und Museum)
Publication:
Physics and Chemistry of Minerals, Volume 19, Issue 7, pp.486-491 (PCM Homepage)
Publication Date:
02/1993
Origin:
SPRINGER
Abstract Copyright:
(c) 1993: Springer-Verlag
DOI:
10.1007/BF00203189
Bibliographic Code:
1993PCM....19..486L

Abstract

The electrochemical reduction of xanthoconite, proustite, pyrostilpnite, and pyrargyrite was studied by abrasive stripping voltammetry, a technique which is based upon a preliminary mechanical transfer of trace amounts of the mineral onto the surface of a paraffin impregnated graphite electrode. Because the electrochemical reduction proceeds near to reversibility and is very similar for each pair of minerals, the peak potentials in differential pulse voltammetry can be used to calculate the standard enthalpy of phase transformation of xanthoconite to proustite and of pyrostilpnite to pyrargyrite: ΔT H (xanth → proust) O = 35.46 ± 14.15 kJ/mol and ΔT H (pyrostilp → pyrarg) O = 38.85 ± 6.60 kJ/mol. These values are not accessible otherwise until now.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints