New semiconducting ternary compounds

Wernick, J. H.; Benson, K. E.

doi:10.1016/0022-3697(57)90066-5

Cited by 105 publications

(48 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The melting points reported for enargite are not unique. Some authors suggest the congruent melting of enargite at 655 C [19], and 674 C [20] while others report a particular decomposition at 600 C [4]. A detailed survey of the contradictory results is given by Müller and Blachnik who report the melting point of Cu 3 AsS 4 as 694 C [21].…”

Section: Phase Analytical Investigationsmentioning

confidence: 99%

The system Cu₃AsS₄–Cu₃SbS₄and investigations on normal tetrahedral structures

Pfitzner¹,

Bernert²

2004

Zeitschrift Für Kristallographie - Crystalline Materials

View full text Add to dashboard Cite

X-ray diffraction / Powder diffraction structure analysis / Single crystal structure analysis / Thiometallate / Tetrahedral structures / Wurtzite structure type / Sphalerite structure type Abstract. In order to develop a novel model to predict if a so called normal tetrahedral compound crystallizes in a wurtzite-or sphalerite superstructure type, the system Cu 3 AsS 4 --Cu 3 SbS 4 was reinvestigated. A solid solution series was prepared and the mixed crystals were characterized by powder X-ray techniques. [MS 4 ] were calculated for the investigated compounds. In addition, the corresponding data were calculated for further solids from literature data. The volumes of the tetrahedra are used to separate compounds with a sphalerite type anion arrangement from compounds with hexagonal packed anions. A closer inspection of the tetrahedra volumes reveals a greater variation for one given material in the case of wurtzite type superstructures than for sphalerite type superstructures. A critical difference in the tetrahedra volumes is derived from these data.

show abstract

Section: Phase Analytical Investigationsmentioning

confidence: 99%

The system Cu₃AsS₄–Cu₃SbS₄and investigations on normal tetrahedral structures

Pfitzner¹,

Bernert²

2004

Zeitschrift Für Kristallographie - Crystalline Materials

View full text Add to dashboard Cite

show abstract

“…Its melting has a congruent character with a melting point of 763 K. This is in contradiction with previous findings [8], in which the second ternary compound in the Cu 2 Se-Sb 2 Se 3 system with the composition of Cu 3 SbSe 3 was prepared. One more compound of the Cu-Sb-Se systemCu 3 SbSe 4 -was first synthesized separately [9] and its phase diagram indicates that this material forms via a peritectic reaction at about 663 K [7]. Its crystal structure was also established [10,11].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Phase Relations in the CuSbSe₂– CuInSe₂System

et al. 2016

View full text Add to dashboard Cite

The CuInSe 2 and CuSbSe 2 ternary compounds and alloys of the (CuSbSe 2 ) 1-x ⋅(CuInSe 2 ) x system with the mole fraction of CuInSe 2 (x) equal to 0. 05, 0.15, 0.25, 0.375, 0.50, 0.625, 0.75, 0.85, and 0.95 were prepared and the phase relations in this system were investigated by X-ray powder diffraction, optical microscopy, and scanning electron microscopy. It was shown that the alloys of the CuSbSe 2 -CuInSe 2 system are biphasic at room temperature in the whole range of compositions, and the limits of solubility for CuSbSe 2 in CuInSe 2 and for CuInSe 2 in CuSbSe 2 do not exceed 0.001 mole fraction.

show abstract

“…Only two authors have independently reported the thermodynamic values for enargite. The first and the most reliable information was published by Craig and Barton, [7] who estimated the values based on the studies of Wernik and Benson [8] and Maske and Skinner, [9] followed by the study of Seal II et al [10] who measured the heat capacity of enargite experimentally. Most researchers use the information from either of the mentioned articles to estimate the free energy of formation for enargite.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of the Cu-As-S-(O) System Relevant to Sulfuric Acid Baking of Enargite at 473 K (200 °C)

Safarzadeh

Miller

Huang

2013

Metall Mater Trans B

View full text Add to dashboard Cite

While the growing demand for copper has compelled the industry to adapt new technologies for the treatment of copper-arsenic (enargite) concentrates, the refractory nature of such concentrates combined with the troublesome presence of arsenic has created a major metallurgical and environmental challenge. Preliminary results of the acid bake-leach process at the University of Utah have shown some potential advantages for the treatment of enargite concentrates. While the transformation of enargite to copper sulfate, arsenolite, and elemental sulfur has already been established experimentally, thermodynamic evaluation of the sulfuric acid baking process provides further understanding which should be useful. In this article, the available thermodynamic data for the species involved in the Cu-As-S-O system are compiled. These data were used to calculate the phase stability (Kellogg) diagrams as well as equilibrium compositions at 473 K (200°C) using the STABCAL and HSC Chemistry Ò 5.1 software packages. The equilibrium composition calculations indicate that enargite can transform to copper sulfate either directly or through chalcocite and/or covellite. The major gaseous species during baking were found to be SO 2 and H 2 O. The results of the thermodynamic calculations were further compared with two confirmatory baking experiments involving a high-quality enargite sample. The condensed reaction products from sulfuric acid baking based on XRD results include CuSO 4 , As 2 O 3 , CuOAECuSO 4 , and S 8 under both neutral and oxidative conditions. While all these compounds were predicted through equilibrium calculations, some of the predicted compounds were not detected in the sulfuric acid-baked enargite. None of the calculations indicated any appreciable amounts of arsenic-bearing gases at the baking temperature of 473 K (200°C). Consistent with thermodynamic predictions, no H 2 S gas was detected during the sulfuric acid baking experiment. Approximately, 80 pct of the baked enargite samples were leached in water.

show abstract

New semiconducting ternary compounds

Cited by 105 publications

References 1 publication

The system Cu₃AsS₄–Cu₃SbS₄and investigations on normal tetrahedral structures

The system Cu₃AsS₄–Cu₃SbS₄and investigations on normal tetrahedral structures

Preparation and Phase Relations in the CuSbSe₂– CuInSe₂System

Thermodynamic Analysis of the Cu-As-S-(O) System Relevant to Sulfuric Acid Baking of Enargite at 473 K (200 °C)

Contact Info

Product

Resources

About

New semiconducting ternary compounds

Cited by 105 publications

References 1 publication

The system Cu3AsS4–Cu3SbS4and investigations on normal tetrahedral structures

The system Cu3AsS4–Cu3SbS4and investigations on normal tetrahedral structures

Preparation and Phase Relations in the CuSbSe2– CuInSe2System

Thermodynamic Analysis of the Cu-As-S-(O) System Relevant to Sulfuric Acid Baking of Enargite at 473 K (200 °C)

Contact Info

Product

Resources

About

The system Cu₃AsS₄–Cu₃SbS₄and investigations on normal tetrahedral structures

The system Cu₃AsS₄–Cu₃SbS₄and investigations on normal tetrahedral structures

Preparation and Phase Relations in the CuSbSe₂– CuInSe₂System