Abstract
The phase and chemical composition of drop-shaped inclusions in a directionally crystallized solid solution was studied. The initial melt contained (mol %): Fe, 31.79; Cu, 15.94; Ni, 1.70; S, 50.20; Sn, 0.05; and As, 0.04, along with Pt, Pd, Rh, Ru, Ag, Au, Se, Te, Bi, and Sb each of 0.03. The results of experiments testify to the simultaneous separation of two types of liquids under cooling of the initial sulfide melt within the (Pd, Au, Ag)–(Bi, Sb, Te) and Cu–(S, Bi, Sb, Te) subsystems, respectively. The solidification of these liquids resulted in the appearance of inclusions subdivided by the authors into four classes. Class I was characterized by a eutectoid structure with the matrix of the Pd(Bi, Sb)хTe1 – х solid solution and Au crystallites with admixed Ag, Cu, and Pd. Class II was constituted of sulfosalts with Bi and Au inclusions. The inclusions of sperrylite Pt(As, S)2 were ascribed to class III. Class IV was formed by composite inclusions consisting of fragments of classes I–III. The experiment described showed the more complicated behavior of noble metals and metalloid impurities under crystallization of compound sulfide–metalloid melts against the data of isothermal experiments described earlier.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Notes
The iss solid solution was described by [6]. When studying the distribution of macrocomponents within the ingot treated, the authors found three modifications of the intermediate solid solution characterized by similar compositions. The present report describes inclusions of zone III formed of the iss1 phase.
REFERENCES
H. M. Helmy, C. Ballhaus, J. Berndt, C. Bockrath, and C. Wohlgemuth-Ueberwasser, Contrib. Mineral. Petrol. 153, 557–591 (2007).
F. Cafagna and P. J. Jugo, Geochim. Cosmochim. Acta 178, 233–258 (2016).
E. F. Sinyakova and V. I. Kosyakov, Russ. Geol. Geophys. 53 (10), 1055–1076 (2012).
V. V. Distler, E. F. Sinyakova, and V. I. Kosyakov, Dokl. Earth Sci. 469 (2), 811–815 (2016).
E. Sinyakova, V. Kosyakov, V. Distler, and N. Karmanov, Can. Mineral. 54 (2), 491–509 (2016).
M. E. Fleet and Y. Pan, Geochim. Cosmochim. Acta 58, 3369–3377 (1994).
T. B. Massalski, H. Okamoto, P. R. Subramanian, and L. Kacprzak, Binary Alloy Phase Diagrams (ASM Int., Materials Park, OH, 1990).
L. J. Carbi, Can. Inst. Mining Metall. Petrol. Spec. 54, 13–129 (2002).
N. J. Cook, L. Ciobanu, R. K. W. Merkle, and H.-J. Bernhardt, Can. Mineral. 40 (2), 329–340 (2002).
E. Makovicky, Can. Inst. Min. Metall. Pet. Spec. 54, 131–175 (2002).
Thernary Alloy Systems. Noble Metal Systems. Selected Systems from Ag–Al–Zn to Rh–Ru–Sc (Landolf–Börnstein—Group IV. Physical Chemistry, 2006), Vol. 11B.
A. A. Godovikov, Bismuth Sulfate Salts (Nauka, Moscow, 1972) [in Russian].
Funding
This study was carried out within the framework of a State Assignment (project nos. 0330–2016–0001 and II.1.64.4) and supported by the integrated program of basic research of the Siberian Branch, Russian Academy of Sciences (II.1 no. 303).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by A. Rylova
Rights and permissions
About this article
Cite this article
Sinyakova, E.F., Kosyakov, V.I. & Goryachev, N.A. Formation of Drop-Shaped Inclusions Based on Pt, Pd, Au, Ag, Bi, Sb, Te, and As under Crystallization of an Intermediate Solid Solution in the Cu–Fe–Ni–S System. Dokl. Earth Sc. 489, 1301–1305 (2019). https://doi.org/10.1134/S1028334X19110072
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1028334X19110072