Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-13T02:35:14.115Z Has data issue: false hasContentIssue false
  • English
  • Français

Demicheleite-(I), BiSI, a new mineral from La Fossa Crater, Vulcano, Aeolian Islands, Italy

Published online by Cambridge University Press:  05 July 2018

F. Demartin ,
C. M. Gramaccioli  and
I. Campostrini
F. Demartin*
Affiliation:
Università degli Studi di Milano, Dipartimento di Chimica Strutturale e Stereochimica Inorganica, via G. Venezian 21, I-20133 Milano, Italy
C. M. Gramaccioli
Affiliation:
Università degli Studi di Milano, Dipartimento di Chimica Strutturale e Stereochimica Inorganica, via G. Venezian 21, I-20133 Milano, Italy
I. Campostrini
Affiliation:
Università degli Studi di Milano, Dipartimento di Chimica Strutturale e Stereochimica Inorganica, via G. Venezian 21, I-20133 Milano, Italy
*
*E-mail: francesco.demartin@unimi.it
Get access Rights & Permissions [Opens in a new window]

Abstract

Demicheleite-(I), ideally BiSI, is the iodine-dominant analogue of demicheleite-(Br) and demicheleite-(Cl). It was found in an active medium-temperature intracrateric fumarole at La Fossa crater, Vulcano Island, Aeolian archipelago, Sicily, Italy. The mineral is the first bismuth sulphoiodide so far discovered in a wholly natural environment, and corresponds to the already known synthetic compound. It occurs as acicular to stout, translucent crystals up to 0.25 mm long in an altered pyroclastic breccia, together with demicheleite-(Br), bismoclite, bismuthinite, godovikovite, panichiite, aiolosite, brontesite, adranosite and other new phases under study. The colour is dark red to black, the lustre submetallic. The unit cell is orthorhombic, space group Pnam, with a = 8.4501(7) Å, b = 10.1470(9) Å , c = 4.1389(4) Å , V = 354.88(4) Å3, and Z = 4. The crystal habit is prismatic, with the main forms {110} and {111} inferred from analogy with demicheleite-(Br). Twinning was not observed. The strongest 6 lines in the X-ray powder diffraction pattern [dobs.(Å) (I/I0) (hkl)] are: 6.490 (100) (110); 4.346 (94) (120); 3.896 (90) (210); 2.709 (60) (310); 2.161 (38) (330); 3.243 (22) (220). The chemical analysis obtained by WDS electron microprobe gave: Bi 58.32, S 9.43, I 23.69, Br 5.66, Cl 1.01, totalling 98.11 wt.%, corresponding to an empirical formula (based on 3 a.p.f.u.) of: Bi0.97S1.03(I0.65Br0.25Cl0.10)Σ1.00. The unit-cell data are close to those of the synthetic compound, whose crystal structure is already known. The calculated density is 6.411 g cm–3.

Keywords

demicheleite-(I)demicheleite-(Br)demicheleite-(Cl)new mineral speciesbismuthiodine mineralssulphoiodidesVulcano IslandAeolian IslandsItaly
Type
Research Article
Information
Mineralogical Magazine , Volume 74 , Issue 1 , February 2010 , pp. 141 - 145
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bindi, L., Garavelli, A., Pinto, D., Pratesi, G. and Vurro, F. (2008) Ordered distribution of I and Cl in the low-temperature crystal structure of mutnovskite, Pb4As2S6ICl: An X-ray single-crystal study. Journalof Solid State Chemistry, 18, 306–312.CrossRefGoogle Scholar
Campostrini, I., Demartin, F., Gramaccioli, C.M. and Orlandi, P. (2008) Hephaistosite, TlPb2Cl5, a new thallium mineral species from La Fossa crater, Vulcano, Aeolian Islands, Italy. The Canadian Mineralogist, 46, 701–708.CrossRefGoogle Scholar
Demartin, F., Gramaccioli, C.M., Campostrini, I. and Orlandi, P. (2008 a) Knasibfite, K3Na4[SiF6]3[BF4], a new hexafluorosilicate-tetrafluoroborate from La Fossa crater, Vulcano, Aeolian Islands, Italy. The Canadian Mineralogist, 46, 419–425.Google Scholar
Demartin, F., Gramaccioli, C.M., Campostrini, I. and Orlandi, P. (2008 b) Thermessaite K2[AlF3SO4], a new ino-aluminofluoride-sulfate from La Fossa crater, Vulcano, Aeolian Islands, Italy. The Canadian Mineralogist, 46, 693–700.CrossRefGoogle Scholar
Demartin, F., Gramaccioli, C.M., Campostrini, I. and Orlandi, P. (2008 c) Demicheleite, BiSBr, a new mineral from La Fossa crater, Vulcano, Aeolian Islands, Italy. American Mineralogist, 93, 1603–1607.CrossRefGoogle Scholar
Demartin, F., Campostrini, I. and Gramaccioli, C.M. (2009 a) Panichiite, natural ammonium hexachlorostannate, (NH4)2SnCl6, from La Fossa crater, Vulcano, Aeolian Islands, Italy. The Canadian Mineralogist, 47, 367–372.CrossRefGoogle Scholar
Demartin, F., Gramaccioli, C.M. and Campostrini, I. (2009 b) Demicheleite-(Cl), BiSCl, a new mineral from La Fossa Crater, Vulcano, Aeolian Islands, Italy. American Mineralogist, 94, 1045–1048.CrossRefGoogle Scholar
Demartin, F., Gramaccioli, C.M. and Campostrini, I. (2009 c) Brontesite, (NH4)3PbCl5, a new product of fumarolic activity from La Fossa Crater, Vulcano, Aeolian Islands, Italy. The Canadian Mineralogist, 47, 1237–1243.CrossRefGoogle Scholar
Demartin, F., Gramaccioli, C.M. and Campostrini, I. (2010 a) Aiolosite, Na2(Na2Bi)(SO4)3Cl, a new sulfate isotypic to apatite from La Fossa Crater, Vulcano, Aeolian Islands, Italy. American Mineralogist, 95, 382–385.CrossRefGoogle Scholar
Demartin, F., Gramaccioli, C.M. and Campostrini, I. (2010 b) Adranosite, (NH4)4NaAl2(SO4)4Cl(OH)2, a new ammonium sulfate chloride from La Fossa Crater, Vulcano, Aeolian Islands, Italy. The Canadian Mineralogist, 48, in press.Google Scholar
Demartin, F., Gramaccioli, C.M. and Campostrini, I. (2010 c) Pyracmonite, (NH4)3Fe(SO4)3, a new ammonium iron sulfate from La Fossa crater, Vulcano, Aeolian Islands, Italy. The Canadian Mineralogist, (in press).CrossRefGoogle Scholar
Doenges, E. (1950) Über Thiohalogenide des dreiwertigen Antimons und Wismuts. Zeitschrift für Anorganische und Allgemeine Chemie, 263, 112–132.CrossRefGoogle Scholar
Foord, E.E., Berendsen, P. and Storey, L.O. (1974) Corderoite, first natural occurrence of α-Hg3S2Cl2, from the Cordero mercury deposit, Humboldt County, Nevada. American Mineralogist, 59, 652–655.Google Scholar
Garavelli, A., Laviano, R. and Vurro, F. (1997) Sublimate deposition from hydrothermal fluids at the Fossa crater - Vulcano, Italy. European Journal of Mineralogy, 9, 423–432.CrossRefGoogle Scholar
Garavelli, A., Mozgova, N.N., Orlandi, P., Bonaccorsi, E., Pinto, D., Moëlo, Y. and Borodaev, Yu.S. (2005) Rare sulfosalts from Vulcano, Aeolian Islands, Italy. VI. Vurroite Pb20Sn2(Bi,As)22S54Cl6, a new mineral species. The Canadian Mineralogist, 43, 703–711.CrossRefGoogle Scholar
Haase-Wessel, W. (1973) Die Kristallstruktur des Wismutsulfidjodids (BiSJ). Naturwissenschaften, 60, 474.CrossRefGoogle Scholar
Holland, T.J.B. and Redfern, S.A.T. (1997) Unit cell refinement from powder diffraction data: the use of regression diagnostics. Mineralogical Magazine, 61, 65–77.CrossRefGoogle Scholar
Keller, E. and Krämer, V. (2006) Experimental versus expected halide-ion size differences; structural changes in three series of isotypic bismuth chalcogenide halides. Acta Crystallographica B, 62, 417–423.CrossRefGoogle ScholarPubMed
Mason, B., Mumme, W.G. and Sarp, H. (1992) Capgaronnite, HgS·Ag(Cl,Br,I), a new sulfide-halide mineral from Var, France. American Mineralogist, 77, 197–200.Google Scholar
Sarp, H., Birch, W.D., Hlava, P.F., Pring, A., Sewell, D.K.B. and Nickel, E.H. (1987) Perroudite, a new sulfide-halide of Hg and Ag from Cap Garonne, Var, France, and from Broken Hill, New South Wales, and Coppin Pool, Western Australia. American Mineralogist, 72, 1251–1256.Google Scholar
Vasil'ev, V.L., Pal'chik, N.A. and Grechishev, O.K. (1984) Lavrentievite and arzakite, new natural sulfohalogenides of mercury. Geologiya i Geofizika, 7, 54–63. (in Russian).Google Scholar
Voutsas, G.P. and Rentzeperis, P.J. (1980) The crystal structure of the paraelectric bismuth thiochloride, BiSCl, Zeitschrift fü r Kristallographie, 152, 109–118.CrossRefGoogle Scholar
Voutsas, G.P. and Rentzeperis, P.J. (1984) The crystal structure of bismuth sulfide bromide, BiSBr, Zeitschrift für Kristallographie, 166 153–158.Google Scholar
Zelenski, M. and Bortnikova, S. (2005) Sublimate speciation at Mutnovsky volcano, Kamchatka. European Journalof Mineralogy, 17, 107–118.CrossRefGoogle Scholar
Zelenski, M., Balič-Žunič, T., Bindi, L., Garavelli, A., Makovický, E., Pinto, D. and Vurro, F. (2006) First occurrence of iodine in natural sulfosalts: The case of mutnovskite, Pb2AsS3(I,Cl,Br), a new mineral from Mutnovsky volcano, Kamchatka Peninsula, Russian Federation. American Mineralogist, 91, 21–28.CrossRefGoogle Scholar