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chalcopyrite
chalcopyrite
chalcopyrite (copper pyrites) Most common copper mineral, CuFeS
2; sp. gr. 4.1–4.3;
hardness 3.5–4.0;
tetragonal; brass-yellow, often with an iridescent tarnish; greenish-black
streak;
metallic lustre; sometimes
massive, crystals usually
tetrahedra;
cleavage imperfect {011};
primary mineral found in
igneous rocks and hydrothermal veins, in association with
pyrite,
pyrrhotine,
cassiterite,
sphalerite,
galena,
calcite, and
quartz, an important mineral in
porphyry copper deposits, and also occurs in quartz
diorite, and in
pegmatites, crystalline
schists,
porphyry copper deposits,
syngenetic copper ores and
skarns, and contact
metamorphic zones. It is deeper in colour than pyrite, more brittle and harder than
gold, is soluble in nitric acid, and its alteration products are
secondary copper minerals. It is a major
ore mineral for copper.
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Leaching of sulfidized chalcopyrite with H(2)SO(4)-NaCl-O(2)
Magazine article from: Metallurgical and Materials Transactions; 4/1/2003; ; 700+ words
; The recovery of copper from chalcopyrite by leaching is complex not only...the leaching of sulfidized chalcopyrite is very attractive because of...the leaching of the untreated chalcopyrite. In this work, the results...
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Sulfidation of chalcopyrite with elemental sulfur
Magazine article from: Metallurgical and Materials Transactions; 2/1/2003; ; 700+ words
; The sulfidation of chalcopyrite concentrate with elemental sulfur...showed that the sulfidation of chalcopyrite forms CuS and FeS^sub 2^ at...were formed. The sulfidation of chalcopyrite proceeds mainly through the gaseous...
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Copper Leaching from Chalcopyrite Concentrates
Magazine article from: JOM; 7/1/2005; ; 700+ words
; Chalcopyrite (CuFeS^sub 2^) is one of the most...been developed to leach copper from chalcopyrite concentrates. These processes recover...leaching of the copper component of chalcopyrite concentrates, followed by solvent...
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Kinetics of the sulfidation of chalcopyrite with gaseous sulfur
Magazine article from: Metallurgical and Materials Transactions; 2/1/2003; ; 700+ words
; The sulfidation of chalcopyrite with gaseous sulfur in the temperature...with a shrinking core of unreacted chalcopyrite surrounded by successive layers...by the reaction occurring at the chalcopyrite-pyrite interface, resulting...
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Microbially enhanced removal of pyrite and chalcopyrite from oxide gangue minerals with reference to desulfurization of tailings
Magazine article from: Minerals & Metallurgical Processing; 11/1/2004; ; 700+ words
; ...ofsulfide minerals, such as pyrite and chalcopyrite ,from oxide gangue minerals, quartz...effective separation of pyrite and chalcopyrite from quartz and calcite from the viewpoint...above scenario, a system of pyrite and chalcopyrite along with quartz and calcite was chosen...
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A recipe for microwave semiconductors. (microwave used to make batches of chalcopyrites) (Brief Article)
Magazine article from: Science News; 6/19/1993; 628 words
; ...easier way to make chalcopyrites, materials used in...extremely thin films of chalcopyrite and layer them to...semiconductors. Making the chalcopyrite is the hard part...elements to crystalline chalcopyrite. In the June 11 SCIENCE...they can now make chalcopyrites in just three minutes...
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Extraction of copper from chalcopyrite concentrates without sulfuric acid generation via chlorination: Part 2: Selective oxidation of chlorinated products
Magazine article from: Minerals & Metallurgical Processing; 11/1/2000; ; 700+ words
; ...hydrometallurgical processing of a chalcopyrite concentrate. In this article, the...undissolved. Key words: Copper, Chalcopyrite, Chlorination, Fluidized bed reactors...metals. While chemical leaching of chalcopyrite concentrates in aqueous chloride media...
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Electronic structure, linear, nonlinear optical susceptibilities and birefringence of CuInX.sub.2 (X = S, Se, Te) chalcopyrite-structure compounds.(Research article)
Magazine article from: PMC Physics B; 5/19/2008; ; 700+ words
; ...10, 11]. Ternary chalcopyrite appear to be promising...The [math omitted] chalcopyrites concerned in this...structures, such as chalcopyrites, the MTA is a poor...dynamical properties of chalcopyrites are well known and...properties of the chalcopyrite semiconductor CuInS...
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Improved leaching performance of chalcopyrite by microbial cultures subjected to mutation
Magazine article from: Minerals & Metallurgical Processing; 5/1/2008; ; 700+ words
; ...to efficiently leach copper ion from chalcopyrite, microbial samples from acid mine...words: Mutation, Mixed cultures, Chalcopyrite, Leaching Introduction Bioleaching...samples were mixed and enriched. The chalcopyrite used in the experiments originated...
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Extraction of copper from chalcopyrite concentrates without sulfuric acid generation via chlorination, part 3: Integration of gaseous chlorination and selective oxidation
Magazine article from: Minerals & Metallurgical Processing; 11/1/2001; ; 700+ words
; ...conversion was tested for processing chalcopyrite concentrate. It was found that the...Fluidizing-bed reactor, Copper leaching, Chalcopyrite, Precious metals Introduction The...and sulfur chloride conversion on a chalcopyrite concentrate. The process was previously...
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chalcopyrite
Book article from: The Columbia Encyclopedia, Sixth Edition
chalcopyrite or copper pyrites , brass-yellow mineral, sometimes with an iridescent...in the tetragonal system but is usually found in the massive form. Chalcopyrite is of primary origin and occurs in igneous and metamorphic rocks and...
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massive sulphide deposits
Book article from: The Oxford Companion to the Earth
...causes precipitation of minerals such as pyrite (FeS 2 ), chalcopyrite (FeCuS 2 ), sphalerite (ZnS), and galena (PbS) that...pyrite or pyrrhotite, or both and a copper-rich sulphide (chalcopyrite) is overlain by more zinc- and lead-rich sulphides...
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copper pyrites
Book article from: A Dictionary of Earth Sciences
copper pyrites See CHALCOPYRITE .
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stannite
Book article from: A Dictionary of Earth Sciences
...normally the grains are irregular or massive ; occurs in hydrothermal tin- ore deposits and in association with cassiterite , chalcopyrite , and wolframite , also in stanniferous sphalerite – galena ores, and associated with sphalerite, pyrrhotite...
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cryolite
Book article from: A Dictionary of Earth Sciences
...parting; occurs in pegmatites that have been enriched with fluorine, and in association with siderite , quartz , galena , chalcopyrite , fluorite , and cassiterite . The powder becomes almost invisible in water due to its low refractive index . Synthetic cryolite...
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