VAVRINITE, Ni2SbTe2, A NEW MINERAL SPECIES FROM THE KUNRATICE Cu Ni SULFIDE DEPOSIT, CZECH REPUBLIC

Laufek, František; Drábek, Milan; Skála, Roman; Haloda, J.; Táborský, Zdeněk; Cı́sařová, Ivana

doi:10.2113/gscanmin.45.5.1213

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…The [Pt2Te 6 ] octahedra and [Pt1Te 3 ] pyramids are connected by a system of Te–Te bonds at 3.473(9) Å. This distance is significantly larger than that of 2.834 Å observed in native Te (Adenis et al ., 1989) and comparable to interlayer Te–Te distance of 3.543 Å found in vavřínite, Ni 2 SbTe 2 (Laufek et al ., 2007). The weak bonding of Te atoms parallel to the c axis is in perfect agreement with the observed cleavage along {001} and subsequently strong preferred orientation along [001] in the powder diffraction pattern of synthetic mitrofanovite.…”

Section: Crystal Structurementioning

confidence: 99%

Mitrofanovite, Pt₃Te₄, a new mineral from the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia

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Vymazalová

Laufek

et al. 2018

MinMag

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Mitrofanovite, Pt3Te4, is a new telluride discovered in low-sulfide disseminated ore in the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia. It forms anhedral grains (up to ~20 μm × 50 μm) commonly in intergrowths with moncheite in aggregates with lukkulaisvaaraite, kotulskite, vysotskite, braggite, keithconnite, rustenburgite and Pt–Fe alloys hosted by a chalcopyrite–pentlandite–pyrrhotite matrix. Associated silicates are: orthopyroxene, augite, olivine, amphiboles and plagioclase. Mitrofanovite is brittle; it has a metallic lustre and a grey streak. Mitrofanovite has a good cleavage, along {001}. In plane-polarised light, mitrofanovite is bright white with medium to strong bireflectance, slight pleochroism, and strong anisotropy on non-basal sections with greyish brown rotation tints; it exhibits no internal reflections. Reflectance values for the synthetic analogue of mitrofanovite in air (Ro, Re’ in %) are: 58.4, 54.6 at 470 nm; 62.7, 58.0 at 546 nm; 63.4, 59.1 at 589 nm; and 63.6, 59.5 at 650 nm. Fifteen electron-microprobe analyses of mitrofanovite gave an average composition: Pt 52.08, Pd 0.19, Te 47.08 and Bi 0.91, total 100.27 wt.%, corresponding to the formula (Pt2.91Pd0.02)Σ2.93(Te4.02Bi0.05)Σ4.07 based on 7 atoms; the average of eleven analyses on synthetic analogue is: Pt 52.57 and Te 47.45, total 100.02 wt.%, corresponding to Pt2.94Te4.06. The density, calculated on the basis of the formula, is 11.18 g/cm3. The mineral is trigonal, space group R$\overline 3 $m, with a = 3.9874(1), c = 35.361(1) Å, V = 486.91(2) Å3 and Z = 3. The crystal structure was solved and refined from the powder X-ray-diffraction data of synthetic Pt3Te4. Mitrofanovite is structurally and chemically related to moncheite (PtTe2). The strongest lines in the powder X-ray diffraction pattern of synthetic mitrofanovite [d in Å (I) (hkl)] are: 11.790(23)(003), 5.891(100)(006), 2.851(26)(107), 2.137(16)(1013), 2.039(18)(0114), 1.574(24)(0120), 1.3098(21)(0027). The structural identity of natural mitrofanovite with synthetic Pt3Te4 was confirmed by electron backscatter diffraction measurements on the natural sample. The mineral name is chosen to honour Felix P. Mitrofanov, a Russian geologist who was among the first to discover platinum-group element mineralisation in the Fedorova–Pana complex.

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Section: Crystal Structurementioning

confidence: 99%

Mitrofanovite, Pt₃Te₄, a new mineral from the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia

Subbotin

Vymazalová

Laufek

et al. 2018

MinMag

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“…New minerals described in the past six years include telluronevskite (Rídkošil et al, 2001), schlemaite, (Cu, ) 6 (Pb,Bi)Se 4 (Förster et al, 2003), mazzettiite, Ag 3 HgPbSbTe 5 (Bindi and Cipriani, 2004a), museumite, Pb 5 AuSbTe 2 S 12 (Bindi and Cipriani, 2004b), selenojapaite, Ag 3 CuSe 2 (Bindi and Pratesi, 2005), vihorlatite (Skála et al, 2007) and vavrinite, Ni 2 SbTe 2 (Laufek et al, 2007). Although not a Te-or Se-bearing mineral, jonassonite, Bi 4 AuS 5 (Paar et al, 2006) is always associated with Bi-chalcogenides.…”

Section: Telluride and Selenide Minerals -New Datamentioning

confidence: 99%

Understanding gold-(silver)-telluride-(selenide) mineral deposits

et al. 2009

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as part of the epithermal deposit spectrum in his textbook "Mineral deposits". Telluride-enrichment is, however, observed in a far wider range of deposit types, e.g., Au-rich VMS deposits, porphyry Au(Cu) and Au skarns. In at least some of these, a proportion of the gold occurs as Au-(Ag)-tellurides, or as native gold/Au-minerals paragenetically tied with tellurides of other elements, notably bismuth. Despite their enrichment in Te, gold deposits formed under reducing conditions are generally not acknowledged as Au-telluride deposits, because the telluride-rich character is largely expressed through an abundance of Bi-telluride species, commonly stable together with native bismuth. Gold-Bi compounds, such as maldonite and/or jonassonite, contribute to the mineralogical balance of gold ore, instead of Au(Ag)-tellurides (Ciobanu et al., 2005). A modified definition of the term 'gold-telluride deposits' was thus proposed (Cook and Ciobanu, 2005) to encompass the genetic connotation given by the presence of tellurides other than those of Au-Ag. In a preface to a special issue of Mineralogy and Petrology, Ciobanu et al. (2006a) posed a series of questions concerning the 'how?' and 'why?' of gold-telluride deposit formation. They questioned some of the established thinking about how these deposits were understood, not because the ideas are wrong (on the contrary!), but to encourage debate, and look beyond the confines of what was known and which fitted well to certain epithermal deposits. Likewise, Cook and Ciobanu (2005) attempted to build a framework for the role of other types of hydrothermal systems in the generation of telluridebearing deposits, raising certain taboos about classification, alternative settings and deposition mechanisms, the role of tellurides in orogenic gold systems and skarns, and what studies of trace mineralogy could contribute to the broader ore genesis perspective? They stressed the need to expand thermodynamic databases and modelling of oreforming systems (Afifi et al., 1988; Zhang and Spry, 1994a; Simon et al., 1997) to cover a broader range of formation conditions, e.g., pH/eH variation vs. activity/fugacity of various aqueous/gas species in a hydrothermal system. Within a given deposit, telluride-rich ores can be precipitated either at the same site or separately from native gold ore, depending upon precipitation mechanisms and local setting. Contemporary perspectives (e.g., Cooke and McPhail, 2001) include a Te-rich source, generally magmatically-derived, transport of Te as aqueous/vapour species within hydrothermal fluid, and precipitation of Au-Ag-tellurides due to multistage boiling. In an epithermal-porphyry environment (<5 km), these vapours are transported at the upper part of the veins forming a lowgrade Au-Te cap on top of the main Au mineralisation underneath. Whereas this model fits some telluride-bearing Au deposits (e.g., Gold-(silver)-telluride (selenide) ores occur as epithermal orogenic and intrusion related deposits. Although Te and Se are chalcophile elements and share ...

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Interfacial reactions in the Ni/(Bi 0.25 Sb 0.75 ) 2 Te 3 and Ni/Bi 2 (Te 0.9 Se 0.1 ) 3 couples

Chen

Yang

et al. 2016

Journal of Alloys and Compounds

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VAVRINITE, Ni2SbTe2, A NEW MINERAL SPECIES FROM THE KUNRATICE Cu Ni SULFIDE DEPOSIT, CZECH REPUBLIC

Cited by 7 publications

References 6 publications

Mitrofanovite, Pt₃Te₄, a new mineral from the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia

Mitrofanovite, Pt₃Te₄, a new mineral from the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia

Understanding gold-(silver)-telluride-(selenide) mineral deposits

Interfacial reactions in the Ni/(Bi 0.25 Sb 0.75 ) 2 Te 3 and Ni/Bi 2 (Te 0.9 Se 0.1 ) 3 couples

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VAVRINITE, Ni2SbTe2, A NEW MINERAL SPECIES FROM THE KUNRATICE Cu Ni SULFIDE DEPOSIT, CZECH REPUBLIC

Cited by 7 publications

References 6 publications

Mitrofanovite, Pt3Te4, a new mineral from the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia

Mitrofanovite, Pt3Te4, a new mineral from the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia

Understanding gold-(silver)-telluride-(selenide) mineral deposits

Interfacial reactions in the Ni/(Bi 0.25 Sb 0.75 ) 2 Te 3 and Ni/Bi 2 (Te 0.9 Se 0.1 ) 3 couples

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Product

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Mitrofanovite, Pt₃Te₄, a new mineral from the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia

Mitrofanovite, Pt₃Te₄, a new mineral from the East Chuarvy deposit, Fedorovo–Pana intrusion, Kola Peninsula, Russia