Titre du document / Document title
Compositional variation of cooperite, braggite, and vysotskite from the Bushveld Complex
Auteur(s) / Author(s)
VERRYN S. M. C. ;
MERKLE R. K. W. ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
Univ. Pretoria, dep. geology, Pretoria 0002, AFRIQUE DU SUD
Résumé / Abstract
The compositions of coexisting and individual cooperite (ideally PtS) and braggite (ideally (Pt,Pd)S) grains from the Merensky Reef of the Bushveld Complex, as well as cooperite, braggite and vysotskite (ideally PdS) grains from the UG-2 of the Bushveld Complex were investigated. There is a clearly defined miscibility gap between cooperite and braggite, but no evident gap between braggite and vysotskite. Partition coefficients between cooperite and braggite are determined on coexisting phases. The K
Dbraggite/cooperite in atomic ratios are estimated to be 0.54 for Pt, 15.81 for Pd and 5.93 for Ni. For Rh and Co the K
Dcooperite/braggite are estimated to be > 1.40 and > 1.46 respectively. No systematic behaviour is detected for Fe and Cu. Coupled substitutions of Pd + Ni for Pt in cooperite and braggite/vysotskite are indicated
Revue / Journal Title
Mineralogical Magazine
ISSN 0026-461X
CODEN MNLMBB
Source / Source
1994, vol. 58, n
o2, pp. 223-234 (1 p.1/4)
Langue / Language
Anglais
Editeur / Publisher
Mineralogical Society, London, ROYAUME-UNI
(1969)
(Revue)
Mots-clés anglais / English Keywords
cooperite ;
braggite ;
vysotskite ;
sulfides ;
platinum ;
palladium ;
Bushveld Complex ;
South Africa ;
miscibility gap ;
partition coefficients ;
rhodium ;
substitution ;
copper ;
nickel ;
pentlandite ;
millerite ;
temperature ;
stability ;
phase equilibria ;
chromitite ;
correlation coefficient ;
Southern Africa ;
Mots-clés français / French Keywords
Cooperite ;
Braggite ;
Vysotskite ;
Sulfure ;
Platine ;
Palladium ;
Complexe Bushveld ;
République Sud Africaine ;
Lacune miscibilité ;
Coefficient partage ;
Rhodium ;
Substitution ;
Cuivre ;
Nickel ;
Pentlandite ;
Millerite ;
Température ;
Stabilité ;
Diagramme équilibre ;
Merensky Reef ;
Elément groupe platine ;
Limite détection ;
Reproductibilité ;
Chromitite ;
Coefficient corrélation ;
Afrique du Sud ;
Mots-clés espagnols / Spanish Keywords
Cooperita ;
Braggita ;
Vysotskita ;
Sulfuro ;
Platino ;
Paladio ;
Complejo Bushveld ;
República de Sudáfrica ;
Coeficiente repartición ;
Rodio ;
Substitución ;
Cobre ;
Niquel ;
Pentlandita ;
Millerita ;
Temperatura ;
Estabilidad ;
Diagrama equilibrio ;
Cromitita ;
Coeficiente correlación ;
África Sur ;
Localisation / Location
INIST-CNRS, Cote INIST : 3052, 35400004626827.0050
Nº notice refdoc (ud4) : 4072331
