Silver substitution into synthetic zinc, cadmium, and iron tetrahedrites

Pattrick, R. A. D.; Hall, Anthony

doi:10.1180/minmag.1983.047.345.05

Cited by 68 publications

(49 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

Section: Crystal Structurementioning

confidence: 99%

“…Additional investigations on how the tetrahedrite-tennantite structure is changed through incorporation of major elements such as Ag, Fe, Zn or Hg have been carried out (e.g., [31][32][33][34]), as has research into the possible oxidation and coordination states of such elements (e.g., [35][36][37] [4] classify the tetrahedrite isotypic series as sulfosalts with an excess of small (univalent) cations (Ag,Cu) relative to (As,Sb,Bi), and further sub-group them as Cu(Ag)-rich sulfosalts. The tetrahedrite isotypic series is the most complex isostructural series among sulfosalts due to the extensive iso-and heterovalent substitutions that are possible.…”

Section: Crystal Structurementioning

confidence: 99%

See 1 more Smart Citation

Minor and Trace Elements in Natural Tetrahedrite-Tennantite: Effects on Element Partitioning among Base Metal Sulphides

2017

View full text Add to dashboard Cite

Minerals of the tetrahedrite isotypic series are widespread components of base metal ores, where they co-exist with common base metal sulphides (BMS) such as sphalerite, galena, and chalcopyrite. We used electron probe microanalysis and laser-ablation inductively-coupled plasma mass spectrometry to obtain quantitative multi-trace element data on tetrahedrite-tennantite in a suite of 37 samples from different deposits with the objective of understanding which trace elements can be incorporated, at what levels of concentration, and how the presence of tetrahedrite-tennantite influences patterns of trace element partitioning in base metal ores. Apart from Fe and Zn, Hg and Pb are the two most abundant divalent cations present in the analysed tetrahedrite-tennantite (up to 10.6 wt % Hg and 4 wt % Pb). Cadmium, Co and Mn are also often present at concentrations exceeding 1000 ppm. Apart from one particularly Te-rich tetrahedrite, most contained very little Te (around 1 ppm), irrespective of prevailing assemblage. Bismuth is a common minor component of tetrahedrite-tennantite (commonly > 1000 ppm). Tetrahedrite-tennantite typically hosts between 0.1 and 1000 ppm Se, while Sn concentrations are typically between 0.01 and 100 ppm. Concentrations of Ni, Ga, Mo, In, Au, and Tl are rarely, if ever, greater than 10 ppm in tetrahedrite-tennantite and measured W concentrations are consistently <1 ppm. Taking into account the trace element concentrations in co-crystallizing BMS, the results presented allow the partitioning trends between co-crystallized sphalerite, galena, chalcopyrite, and tetrahedrite-tennantite to be defined. In co-crystallizing BMS assemblages, tetrahedrite-tennantite will always be the primary host of Ag, Fe, Cu, Zn, As, and Sb, and will be the secondary host of Cd, Hg, and Bi. In contrast, tetrahedrite-tennantite is a poor host for the critical metals Ga, In, and Sn, all of which prefer to partition to co-crystallizing BMS. This study shows that tetrahedrite-tennantite is a significant carrier of a range of trace elements at concentrations measurable using contemporary instrumentation. This should be recognized when establishing protocols for trace element analysis of tetrahedrite-tennantite, and when assessing the main hosts of trace elements in any given assemblage, e.g., for geometallurgical purposes.

show abstract

Section: Crystal Structurementioning

confidence: 99%

Section: Crystal Structurementioning

confidence: 99%

Minor and Trace Elements in Natural Tetrahedrite-Tennantite: Effects on Element Partitioning among Base Metal Sulphides

2017

View full text Add to dashboard Cite

show abstract

“…THE substitution of Fe and Ag into tetrahedrites has been the subject of various studies (Hall et aL, 1974;Charlat and Levy, 1974;Kalbskopf, 1972;Sugaki et al, 1975;Pattrick and Hall, 1983;Johnson and Burnham, 1985;Petersen and Miller, 1986;Charnock et al, 1988). Of particular interest has been the site of substitution of the iron and silver and the oxidation state of the iron.…”

Section: Introductionmentioning

confidence: 99%

EXAFS and Mössbauer spectroscopic study of Febearing tetrahedrites

et al. 1989

Self Cite

View full text Add to dashboard Cite

EXAFS and M6ssbauer data on synthetic silver-rich tetrahedrite, (Cu, Ag)10+xFe2_xSb4S13, reveal the presence of Fe 2 § and Fe 3 § the former occupying trigonal planar sites and the latter tetrahedral sites. There is also a clear relationship between increased silver substitution and an increase in Fe e+. The amount of Fe 3 § incorporated in the synthetic tetrahedrites is proportional to the excess of Cu + (Cu + Ag > 10 atoms) in the mineral, thus maintaining a charge balance. The iron in the natural tetrahedrites and the tennantite examined is mainly tetrahedrally co-ordinated Fe z §

show abstract

“…In fact, considering only the Cu-rich and Cu-poor synthetic compounds, Tatsuka & Morimoto (1977a) suggested the presence, at low temperature, of coexisting tetrahedrite and "pseudotetrahedrite", as named by the authors, the diffraction patterns of which differ only by the presence of some "superstructure" reflections. The small number of Ag-rich samples has not allowed us to study the relative a pred trend as suggested by Pattrick & Hall (1983).…”

Section: X-ray Diffractionmentioning

confidence: 99%

Crystal Chemistry of Tetrahedrite Solid-Solution: Epr and Magnetic Investigations

Benedetto

Bernardini

Borrini

et al. 2002

The Canadian Mineralogist

View full text Add to dashboard Cite

One hundred and thirty samples from the collection of the Natural History Museum in Florence, labeled as tetrahedrite, have been extensively studied by means of SEM, XRD, EPMA, DTA, EPR and SQUID techniques. Wide-ranging substitutions, confirmed by compositional data, play a fundamental role in the thermal behavior, "stabilizing" natural tetrahedrite with respect to the synthetic equivalent. In order to determine the valence state and site occupancies of Cu and Fe, electron paramagnetic resonance (EPR) and magnetic measurements were performed on selected samples of natural tetrahedrite. EPR measurements were performed down to 130 K, and magnetic susceptibility measurements, in the range 2-300 K. EPR magnetic parameters were determined on the basis of spectral simulations. The behaviour of --1 versus temperature was interpreted by means of Heisenberg's model, thus yielding values for the Curie and Weiss constants. All samples are characterized by the presence of small amounts of Cu 2+ and Fe 2+ ; Fe 3+ was detected only in metal-deficient samples. Both Cu and Fe occupy the tetrahedral site; whereas in some samples the former appears aggregated in dimers, the latter is randomly distributed over the lattice. The results of the study confirm the crystal-chemical formula of the tetrahedrite samples investigated.Keywords: tetrahedrite solid-solution, compositional data, thermal behavior, electron paramagnetic resonance, magnetic susceptibility, crystal chemistry, cupric ion. SOMMAIRENous avons caractérisé cent-trente échantillons appelés tétraédrite dans la collection du Musée d'Histoire Naturelle à Florence par microscopie électronique par balayage, diffraction X, analyse par microsonde électronique, analyse thermique différentielle, résonance paramagnétique des électrons, et la technique SQUID. Des substitutions d'étendue importante, confirmées par données chimiques, exercent un rôle fondamental dans le comportement thermique, "stabilisant" la tétraédrite naturelle par rapport à l'équivalent synthétique. Afin de déterminer la valence et la position de Cu et Fe, nous avons déterminé la résonance paramagnétique des électrons (RPE) d'échantillons naturels choisis jusqu'à 130 K, et les propriétés magnétiques sur l'intervalle 2-300 K. Les paramètres magnétiques des spectres RPE ont été déterminés par simulation. Le comportement de --1 en fonction de la température a été interpreté au moyen du modèle de Heisenberg, menant ainsi à une évaluation des constantes de Curie et de Weiss. Tous les échantillons contiennent de faibles quantités de Cu 2+ et de Fe 2+ . En revanche, on a décelé le Fe 3+ seulement dans les échantillons déficitaires en métaux. Le Cu et le Fe occupent le site tétraédrique. Tandis que le Cu semble agencé en dimères, le Fe serait plutôt distribué de façon aléatoire dans le réseau. Les résultats de notre étude confirment la formule cristallochimique des échantillons de tétraédrite étudiés. (Traduit par la Rédaction)Mots-clés: solution solide de la tétraédrite, données sur la composition, comportemen...

show abstract

Silver substitution into synthetic zinc, cadmium, and iron tetrahedrites

Abstract: ABSTRACT. The limits and effect on cell size of silver substitution into synthetic tetrahedrite, Cu~o (Zn,Fe,Cd2)

Cited by 68 publications

References 20 publications

Minor and Trace Elements in Natural Tetrahedrite-Tennantite: Effects on Element Partitioning among Base Metal Sulphides

Minor and Trace Elements in Natural Tetrahedrite-Tennantite: Effects on Element Partitioning among Base Metal Sulphides

EXAFS and Mössbauer spectroscopic study of Febearing tetrahedrites

Crystal Chemistry of Tetrahedrite Solid-Solution: Epr and Magnetic Investigations

Contact Info

Product

Resources

About