Lucabindiite, (K,NH4)As4O6(Cl,Br), a new fumarole mineral from the "La Fossa" crater at Vulcano, Aeolian Islands, Italy

Garavelli, Anna; Mitolo, Donatella; Pinto, Daniela; Vurro, Filippo

doi:10.2138/am.2013.4194

Cited by 26 publications

(23 citation statements)

References 28 publications

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“…These different phases are generally mixed in various proportions. Proper minrecordite (a dolomite where Mg is almost totally replaced by 29% Zn, Garavelli et al, 1982) has not been recorded in the Jabali samples.…”

Section: Resultsmentioning

confidence: 96%

In search of the lost zinc: A lesson from the Jabali (Yemen) nonsulfide zinc deposit

Mondillo

Boni

Balassone

et al. 2011

Journal of Geochemical Exploration

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Section: Resultsmentioning

confidence: 96%

In search of the lost zinc: A lesson from the Jabali (Yemen) nonsulfide zinc deposit

Mondillo

Boni

Balassone

et al. 2011

Journal of Geochemical Exploration

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“…Exhalative geochemistry and mineralogy have attracted considerable attention recently, owing to the discovery of a wide range of minerals that form during condensation of volcanic gases in fumaroles (Demartin et al , 2014Garavelli et al 2013;Mitolo et al 2013;Krivovichev et al 2013a;Shuvalov et al 2013;Pinto et al 2014;Pekov et al 2013aPekov et al , b, c, d, 2014aMurashko et al 2013;Vergasova et al 2014). Of particular interest are copper oxoselenite chlorides, which, in addition to their mineralogical interest, possess rich and unique structural chemistry and special magnetic properties (Burns and Hawthorne 1995;Bastide et al 2000;Millet et al 2001;Burns et al 2002;Krivovichev et al 2006;Zhang et al 2010;Berdonosov et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Emulating exhalative chemistry: synthesis and structural characterization of ilinskite, Na[Cu5O2](SeO3)2Cl3, and its K-analogue

et al. 2015

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The K-and Na-synthetic analogues of the fumarolic mineral ilinskite have been synthesized by the chemical vapor transport (CVT) reactions method. The A-[Cu 5 O 2 ](SeO 3 ) 2 Cl 3 (A + = K + , Na + ) compounds crystallize in the orthorhombic space group Pnma: a = 18.1691(6) Å, b = 6.4483(2) Å, c = 10.5684(4) Å, V = 1238.19(7) Å 3 , R 1 = 0.018 for 1957 unique reflections with F > 4σ F for K[Cu 5 O 2 ](SeO 3 ) 2 Cl 3 (KI), and a = 17.7489(18) Å, b = 6.4412(6) Å, c = 10.4880(12) Å, V = 1199.0(2) Å 3 , R 1 = 0.049 for 1300 unique reflections with F > 4σ F for Na[Cu 5 O 2 ](SeO 3 ) 2 Cl 3 (NaI). The crystal structures of KI and NaI are based upon the [O 2 Cu 5 ] 6+ sheets consisting of corner-sharing (OCu 4 ) 6+ tetrahedra. The Na-for-K substitution results in the significant expansion of the interlayer space and changes in local coordination of some of the Cu 2+ cations. The A + cation coordination changes from fivefold (for Na + ) to ninefold (for K + ). The CVT reactions method provides a unique opportunity to model physicochemical conditions existing in fumarolic environments and may be used not only to model exhalative processes, but also to predict possible mineral phases that may form in fumaroles. In particular, the K analogue of ilinskite is not known in nature, whereas it may well form from volcanic gases in a K-rich local geochemical environment.

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“…Some rare phases were observed, such as palladium gold (Au 2 Pd) (Figure 7(a)), native nickel (Ni, Fe), cadmoindite (CdIn 2 S 4 ) (Figure 7(b)) [25], and famatinite (Cu 3 SbS 4 ) (Figure 7(f)). Significant amounts of iodine, as measured using ICP-AES and SR-XRF (Tables 2 and 3), are likely stored in a phase with an inferred composition of (NH 4 )As 4 O 6 I (Figure 7(e)), which represents an iodine analogue (20 wt% I) of the rare fumarolic mineral lucabindiite ((K,NH 4 )As 4 O 6 (Cl,Br)) [26]. More abundant minerals included scheelite (CaWO 4 ) ( Figure 6 (Figure 7(h)), cinnabar (HgS) (Figure 7(d)), and stibnite (Sb 2 S 3 ).…”

Section: Rare Minerals In Fumarolic Sulfurmentioning

confidence: 99%

Trace Elements and Minerals in Fumarolic Sulfur: The Case of Ebeko Volcano, Kuriles

et al. 2018

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Native sulfur deposits on fumarolic fields at Ebeko volcano (Northern Kuriles, Russia) are enriched in chalcophile elements (As-Sb-Se-Te-Hg-Cu) and contain rare heavy metal sulfides (Ag2S, HgS, and CuS), native metal alloys (Au2Pd), and some other low-solubility minerals (CaWO4, BaSO4). Sulfur incrustations are impregnated with numerous particles of fresh and altered andesite groundmass and phenocrysts (pyroxene, magnetite) as well as secondary minerals, such as opal, alunite, and abundant octahedral pyrite crystals. The comparison of elemental abundances in sulfur and unaltered rocks (andesite) demonstrated that rock-forming elements (Ca, K, Fe, Mn, and Ti) and other lithophile and chalcophile elements are mainly transported by fumarolic gas as aerosol particles, whereas semimetals (As, Sb, Se, and Te), halogens (Br and I), and Hg are likely transported as volatile species, even at temperatures slightly above 100°C. The presence of rare sulfides (Ag2S, CuS, and HgS) together with abundant FeS2 in low-temperature fumarolic environments can be explained by the hydrochloric leaching of rock particles followed by the precipitation of low-solubility sulfides induced by the reaction of acid solutions with H2S at ambient temperatures. The elemental composition of native sulfur can be used to qualitatively estimate elemental abundances in low-temperature fumarolic gases.

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Lucabindiite, (K,NH4)As4O6(Cl,Br), a new fumarole mineral from the "La Fossa" crater at Vulcano, Aeolian Islands, Italy

Cited by 26 publications

References 28 publications

In search of the lost zinc: A lesson from the Jabali (Yemen) nonsulfide zinc deposit

In search of the lost zinc: A lesson from the Jabali (Yemen) nonsulfide zinc deposit

Emulating exhalative chemistry: synthesis and structural characterization of ilinskite, Na[Cu5O2](SeO3)2Cl3, and its K-analogue

Trace Elements and Minerals in Fumarolic Sulfur: The Case of Ebeko Volcano, Kuriles

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