DOCSLIB.ORG

The Crystal Structure of Gillulyite, TI2(As,Sb)Ssm from the Mercur Gold Deposit, Tooele County, Utah, U.S.A

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Crystal Structure of Gillulyite, TI2(As,Sb)Ssm from the Mercur Gold Deposit, Tooele County, Utah, U.S.A American Mineralogist, Volume 80, pages 394-399, 1995 The crystal structure of gillulyite, TI2(As,Sb)sSm from the Mercur gold deposit, Tooele County, Utah, U.S.A. FRANKLIN F. FOIT, JR. Department of Geology, Washington State University, Pullman, Washington 99164, U.S.A. PAUL D. ROBINSON Department of Geology, Southern Illinois University, Carbondale, Illinois 62901, U.S.A. JAMES R. WILSON Department of Geology, Weber State University, Ogden, Utah 84408-2507, U.S.A. ABSTRACT Gillulyite, TI2(AsH ,SbH )8S13,is monoclinic with space group P2/n and a = 9.584(3), b = 5.679(2), c = 21.501(6) A, ~ = 100.07(2)°, V = 1152.2(7) A3, and Z = 2, The average structure was determined using direct methods and refined to a final residual of 0.046 using 930 reflections. The structure consists of TI-As-S- and As-S-bearing sheets, each present statistically 50% of the time. Four sheets, linked together by Tl-S, As-S, and S-S bonds, are stacked parallel to (00 I), yielding the 21-A c-axis repeat of the average unit cell. The Tll atom within the TI-As-S sheet is coordinated by six S nearest neighbors, which form a distorted trigonal prism. The partially occupied Tl2 position between the sheets is split symmetrically about the twofold axis with a separation of 1.28 A and equal but partial occupancies of25%. The disordering of the Tl2 position and extreme distortion of its coordination polyhedron is probably the result of the Tl+ 6s2lone pair effect. The mean bond distances for the AsS3pyramids range from 2.263 to 2.319 A. However, four of five pyramids have a fourth S neighbor at distances ranging from 2.943 to 3.001 A, which may be rationalized in terms of the AsH 4s210ne pair effect. Edge sharing among the AsS3pyramids results in an As-As distance of 2.562 A, comparable with that observed in elemental As. The presence of S-S and As-As bonding suggests that gillulyite might more appropriately be classified as a sulfide rather than a sulfosalt. INTRODUCTION tions were too weak to be measured and suggest minor The new mineral gillulyite, TI2(As,Sb)8SI3' one of sev- ordering in the b direction that was not investigated. eral unusual Tl minerals found in the Mercur gold de- Systematic absences indicate the space group to be Pn posit, Utah, was reported by Wilson et al. (1991) to be a or P2/n. Intensity statistics support the latter choice, which new thallium arsenic sulfosalt. The details of the occur- was confirmed by the successful solution and refinement rence, composition, optical and physical properties, and of the structure. The severe effects of absorption were powder difITaction and unit-cell data are presented in this corrected by the empirical 'II-scan method. Direct meth- earlier work. This paper presents the results of a struc- ods produced solutions that showed what appeared to be tural investigation of this unusual mineral. AsS3 groups in a linked pattern, but the expected large peaks representing the Tl atoms were absent; thus, these solutions were considered to be false. Only after many STRUCTIJRE DETERMINATION AND REFINEMENT attempts with various direct and heavy atom methods After considerable searching, an irregular fragment of were we able to decipher the highly disordered average gillulyite was found that produced relatively narrow and structure described below, with its partially occupied As, symmetrical diffraction maxima. A hemisphere of data S, and Tl positions. In hindsight, we realize that the direct was collected and averaged to yield a more accurate data methods program Mithril (Gilmore, 1984) had produced set. A scan speed of 6°/min (in w) was used. Weak reflec- correct locations for most of the atoms early in the struc- tions [/<IO.OO"[] were rescanned (maximum of two re- ture determination process, but we were initially unwill- scans) and the counts accumulated to improve accuracy. ing to accept them. The remaining atomic sites were found Experimental details are given in Table l. by difference-Fourier syntheses. Examination of a series of precession photographs con- Full-matrix, least-squares refinement was performed to )2. All computer programs used firmed the cell parameters and revealed a weak zone of minimize ~ w(IFaI - IFe I diffuse and split reflections in the b* direction, which ef- were from Texsan (Molecular Structure Corporation, fectively doubles the length of the b axis. These reflec- 1985). Atomic scattering factors and anomalous disper- 0003-004X/95/0304-0394$02.00 394 FOIT ET AL.: CRYSTAL STRUCTURE OF GlLLULYITE 395 sion corrections were taken from the International Tables TABLE1. Experimental details for gillulyite for X-ray Crystallography (Ibers and Hamilton, 1974). A Crystal data site occupancy refinement of the As positions indicated TI2(As7.78,5bo...)5'3 V = 1152.2(7) A3 M, that virtually all the Sb found in the microprobe analyses = 1435.20 Z=2 of gillulyite (Wilson et aI., 1991) resides at the As4 and Monoclinic 0, ~ 4.14 g/cm P2ln 4.02 g/cm As5 sites; the refined occupancy values are in good agree- Do = a = 9.584(3) A MoKa ment with the electron microprobe analytical values. Table b = 5.679(2) A A ~ 0.71069 A c ~ 21.501(6) A JL= 265.59 cm-1 2 lists the final refined positional, occupancy, and dis- (3 = 100.07(2f T~ 296 K placement parameters; bond distances and angles are pre- Cell parameters from irregular fragment sented in Table 3. The observed and calculated structure 20 refl. 0.22 x 0.14 x 0.10 mm 28 ~ 43.5-49.10 red factors are given in Table 4. I The presence of the weak and diffuse superstructure Data collection Rigaku AFC55 diffractometer 930 observed refl. [I> 4",] reflections, which double the length of b, abnormally large Absoprtion correction 28~ = 50" TI and S thermal parameters, a split Tl2 position, and w scan empirical h ~ -11-11 partial site occupancies reveal the existence of domains 4 refl. k ~ 0-6 ~ 0.48, Tm.. = Tm;" 1.0 I = - 25-25 and partial atom ordering in gillulyite. Thus, what was 4504 measured refl. 3 standard refl. determined and is described below is the average struc- 2031 independent refl. frequency: 150 refl. ture. intensity variation: 1.4% Refinement ~ 4F~/,,~ DISCUSSION Refinement on F w Final R = 0.046 127 parameters General structural details (~,,)~ Rw= 0.061 = 0.001 The structure of gillulyite is a composite of two types S = 1.57 (AP)m.. = 3.83 e/A3 930 refl. (AP)m.. -2.05 e/A3 of structurally similar sheets, TII-As-S-bearing and As- = S-bearing sheets situated parallel to (001). Each of the two sheet types is present statistically 50% of the time. est, and the Tl-S bonds to the bridging S are alternately The first type (Fig. I) consists of single chains of edge- long and short parallel to the chain length (Table 3, Fig. sharing Tll-S6 polyhedra extending parallel to [0 I 0] and 2). Despite having a lower coordination number (6), the isolated three-membered rings, Asl, As2, and As3, of mean Tll-S distance is larger than that observed for [SITI comer-sharing AsS, pyramids. The isolated As,S. rings (3.339 A) in bernardite, TIAssSs (Pasava et aI., 1989), PITI are sutured together by edge sharing with Tll polyhedra (3.294 A) in lorandite, TI2As2S. (fleet, 1973), and [7ITI in adjacent chains. Tli is coordinated by six S atoms (3.288 A) in fangite (Wilson et aI., 1993). Abnormally forming a distorted trigonal prism, with one side parallel long mean bond distances (e.g., [6ITI2-S = 3.445 A) and to (001) and the prism axis parallel to [100]. The Tll-S anomalously high isotropic displacement parameters (Bi", distances range from 3.300 to 3.438 A, with a mean of - 5) were also observed for the partially occupied TI 3.356 A (Table 3). The next nearest S neightbors are S4 positions in the averaged structure of imhofite (Divja- at distances of 3.915 and 3.983 A. Tl polyhedral edges kovic and Nowacki, 1976). shared with adjacent As and Tl polyhedra are the short- Two of the three pyramidal AsS, groups (Asl and As3) that comprise the three-membered rings have only As-S bridge bonds, and these range from 2.289 to 2.359 A (mean I To obtain a copy of Table 4, order Document AM-95-582 = 2.319 A) and 2.294 to 2.352 A (mean = 2.318 A), respectively. These means are almost identical to the ITom the Business Office, Mineralogical Society of America, 1130 Seventeenth Street NW, Suite 330, Washington, DC 20036, average bridge bond (2.31 A) observed in well-refined U.S.A. Please remit $5.00 in advance for the microfiche. sulfosalt structures (Takeuchi and Sadanaga, 1969). The TABLE 2. Atomic coordinates, anisotropic displacement parameters, and B equivalents for gillulyite y x z Occup. Vl1 V22 V33 V23 V'2 V'3 V'" TI1 0.8102(3) 0.9483(5) 0.1488(1 ) 0.5 0.035(1) 0.035(1) 0.066(2) -0.004(1) 0.024(1) -0.008(1) 0.044(1) TI2 0.1895(4) 0.8829(6) 0.2589(2) 0.5 0.130(4) 0.052(2) 0.125(3) -0.009(2) -0.077(4) -0.004(2) 0.114(2) As1 0.4732(2) 0.4472(4) 0.0883(1 ) 1.0 0.010(1) 0.013(1) 0.021(1) 0.001(1) 0.0023(8) 0.002(1) 0.015(1) As2 0.2587(2) 0.9009(5) 0.0205(1 ) 1.0 0.019(1) 0.025(2) 0.029(1) 0.003(1) 0.008(1) 0.014(1) 0.024(1) As3 0.0965(2) 0.4476(5) 0.0883(1 ) 1.0 0.011(1) 0.014(1) 0.023(1) -0.000(1) 0.0069(9) 0.001(1) 0.016(1) As4, 5b1 0.8077(5) 0.2107(8) 0.1446(2) 0.43, 0.07 0.015(3) 0.016(3) 0.016(2) 0.001(2) 0.008(2) 0.002(2) 0.015(1) As5, 5b2 0.8087(5) 0.6617(8) 0.1468(2) 0.46, 0.04 0.017(3) 0.014(2) 0.015(2) -0.002(2) 0.006(2) 0.002(2) 0.015(1) 51 0.3105(6) 0.388(1) 0.1543(3) 1.0 0.009(3) 0.025(4) 0.030(3) 0.002(3) 0.007(2) 0.009(3) 0.021(2) 52 0.6452(5) 0.437(1) 0.1813(2) 1.0 0.015(3) 0.024(3) 0.018(3) 0.001(3) 0.009(2) -0.002(3) 0.018(2) 53 0.4708(7) 0.850(1) 0.0876(3) 1.0 0.019(3) 0.014(4) 0.051(4) -0.004(3) 0.001(3) 0.000(3) 0.029(2) 54 0.2435(6) 0.543(1) -0.0191(3) 1.0 0.023(3) 0.052(4) 0.018(3) 0.005(4) 0.010(2) -0.004(3) 0.030(2) 55 0.0980(7) 0.852(1 ) 0.0879(3) 1.0 0.028(3) 0.023(4) 0.031(3) 0.001(3) 0.013(3) -0.002(3) 0.026(2) 56 0.9980(5) 0.434(1 ) 0.1811(2) 1.0 0.012(3) 0.027(3) 0.018(3) -0.004(3) 0.009(2) 0.000(3) 0.018(2) 57 0.844(1) 0.941(2) 0.2254(5) 0.5 0.028(6) 0.019(6) 0.013(5) 0.007(6) 0.005(4) 0.001(5) 0.020(3) 396 FOIT ET AL.: CRYSTAL STRUCTURE OF GILLULYITE TABLE3.
Load more

Recommended publications
  • Using 2D Gis to Assist 3D Modelling of the Zarshuran Gold Deposit, Iran
    Asadi, Hooshang USING 2D GIS TO ASSIST 3D MODELLING OF THE ZARSHURAN GOLD DEPOSIT, IRAN * Hooshang ASADI HARONI, Edmund SIDES, Kiiza NGONZI International Institute for Aerospace Survey and Earth Sciences (ITC), The Netherlands * Ministry of Higher Education, Tehran, Iran harouni @itc.nl [email protected] Technical Commission Session Themes TC VII-8 KEY WORDS: Spatial data, Integration, Geology, Geophysics, GIS, Data mining, Information extraction ABSTRACT The Zarshuran gold deposit in NW Iran is an area of historic mining for gold and arsenic with considerable potential for discovery of economic gold mineralisation. Geological, geochemical and geophysical data, collected by the Ministry of Mines and Metals were compiled and analysed in a 2-dimensional (2D) GIS. This resulted in the definition of major structural features, and lithological units, that control the gold mineralisation. Spatial modelling and interpretation of the geochemical and geophysical data showed that the mineralization is mainly controlled by chemically-reactive Precambrian carbonates and black shales, extending in a NW-SE direction, and also by NE-SW high angle faults and their intersections with NW-SE structures. The results obtained, from the 2D GIS analysis, were used in the initial phase of the construction and validation of the 3-dimensional (3D) models used for resource estimation. Comparison of the statistical analyses of geochemical data in soils and in drillcore indicated enhanced concentrations of gold in soils at surface, due to residual enrichment. An enrichment relationship was established based on interpretation of the cumulative frequency plots for gold in soil and drillcore samples. Based on this relationship the gold anomalies interpreted from the soil geochemical data were used to infer a resource potential, to a depth of 200m below surface, of 10Mt at an average grade of 0.2 g/t gold.
    [Show full text]
  • University of Nevada, Reno Issues Affecting Heap Biooxidation of Low
    University of Nevada, Reno Issues affecting heap biooxidation of low-grade refractory gold ore: Formation of secondary sulfates, ore lithology, alteration and sulfide mineralogy at Gold Quarry, Carlin, Nevada A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geology by Wes K. Sherlock Dr. Tommy B Thompson/Thesis Advisor August, 2010 i Abstract The Gold Quarry mine is located in the Maggie Creek District in the northern section of the southern half of the Carlin Trend, 11 km north of the town of Carlin, Eureka County, Nevada. The primary metal of interest is gold. The majority of the ore is sulfidic-refractory consisting primarily of homogenously distributed extremely small gold particles, generally ranging in size from colloidal to approximately 50Å, hosted primarily as a solid solution within the structural lattice of arsenian pyrite rims which surround some pre-ore pyrite crystals (Arehart et al., 1993). Arsenian pyrite is also commonly found as discrete fine-grain disseminated crystals or in local fine-grain masses or clouds. High-grade sulfidic refractory ore is processed via roasting methods where as, the low-grade ore cannot be economically processed through the roaster and is instead oxidized by a cost mediated biological heap method on three nominal 800,000 ton pads. The oxidized low-grade ore is then utilized as supplementary mill feed. Recycling of the biooxidation fluid over time has resulted in a solution highly saturated in sulfate and various metals of which iron and aluminum are the largest contributors to sulfate formation. Consequently, local areas within the heap pad that experience dehydration may experience substantial secondary hydrous sulfate mineral accumulations.
    [Show full text]
  • Sulfosalt Systematics: a Review
    Eur. J. Mineral. 2008, 20, 7–46 Published online February 2008 Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy Yves MOËLO1,*, Secretary, Emil MAKOVICKY2,**, Associate Secretary, Nadejda N. MOZGOVA3, past President of the Sulfosalt Sub-Committee, John L. JAMBOR4,Nigel COOK5,Allan PRING6,Werner PAAR7, Ernest H. NICKEL8,Stephan GRAESER9,Sven KARUP-MØLLER10,Tonciˇ BALIC-ŽUNIC2, William G. MUMME8,Filippo VURRO11,Dan TOPA7,Luca BINDI12, Klaus BENTE13 and Masaaki SHIMIZU14 1 Institut des Matériaux Jean Rouxel, UMR 6502 CNRS-Université de Nantes, 2, rue de la Houssinière, 44 322 Nantes Cedex 3, France *Corresponding author, e-mail: [email protected] 2 Department of Geography and Geology, University of Copenhagen, Østervoldgade 10, 1350 Copenhagen, Denmark **Corresponding author, e-mail: [email protected] 3 IGEM, Russian Academy of Sciences, Staromonetny per. 35, Moscow 109017, Russia 4 Leslie Research and Consulting, 316 Rosehill Wynd, Tsawwassen, B.C. V4M 3L9, Canada 5 Natural History Museum (Geology), University of Oslo, Postboks 1172 Blindern, 0318 Oslo, Norway 6 South Australian Museum, Department of Mineralogy, North Terrace, Adelaide, South Australia 5000, Australia 7 Department of Materials Engineering and Physics, University of Salzburg, Hellbrunnerstraße 34, 5020 Salzburg, Austria 8 CSIRO-Exploration & Mining, PO Box 5, Wembley, Western Australia 6913, Australia 9 Naturhistorisches Museum, Augustinerstraße 2, 4001 Basel, Switzerland 10 Institute of Mineral Industry, Danish
    [Show full text]
  • New Mineral Names*
    American Mineralogist, Volume 62, pages 1259-1262, 1977 NewMineral Names* MtcHe.rr-Flrlscsnn, Lours J. CesRrAND ADoLF Pe.ssr Franzinite* Six microprobe analyses gave (range and av.): AsrOu 44.96-45.68,45.36; CuO 16.84-20.22,18.81; ZnO 16.78-18.57, Stefano Merlino and Paolo Orlandi (1977)Franzinite, a new min- 17.90;CdO l3 58-14.93,14.08; CaO 0.41-l.ll' 0.80; PbO 0.14- eral phase from Pitigliano,ltaly. Neues Jahrb. Mineral. Mon- 1.42,0.63: MnO 0.'79-1.27,1.07; sum 97 8l-99 54' 98.65 percent, atsh., 163-167. corresponding to (Cu,Zn,Cd).(AsOa), with Cu:Zn:Cd : 1.19: Microchemical analysis gave SiO, 32.44, Al2Os 25.21, Fe"O" Lll:0.55. The mineral is readily dissolvedby concentratedacids 0.04,MgO 0.14,CaO 12.08,Na,O 11.50,K,O 4.24,SOa 10.65, CO, X-ray study showsthe mineral to be monoclinic,space group 12' 154, Cl 036,H,O 1.88,sum 100.08- (O:Cl,) 0.08 : 100.00 Im. or 12/m, a ll.65, b 12.68,c 6.87(all + 0.01A)' B 98 95 + 0.05'' percent. "SiO, and AlrO, were determined by X-ray fluorescence, Z = 6, G calc 4.95 The strongest X-ray lines (46 given) are 6.41 (vvs) account being taken of the proper correction factor for S and Cl (MS) (020, l0T), 3.29 (vSXll2), 2.876 (vSX400), 2.79s and assuming that the weight percentages sum up to 100 0." (222, 321, 240), 1.644(MS).
    [Show full text]
  • Christite, a New Thallium Mineral from the Carlin Gold Deposit, Nevada
    American Mineralogist, Volume62, pages421425, 1977 Christite,a newthallium mineral from the Carlin golddeposit, Nevada ARruuRS. Rlorxn U.S. GeologicalSuruey, Menlo Park, California 94025 FnnNr W. Dlcrsor Departmentof Geology,Stanford Uniuersity St anfo rd, Cal ift rnia 9430 5 JoHNF. Slecr U.S. GeologicalSuruey, Reston, Virginia 22092 lNn KevtNL. Bnowx ChemistryDiuision, Diuision of Scientffic and IndustrialResearch, Petone, New Zealand Abstract Christite,TlHgAsSr, occurs with realgar,orpiment, and loranditein bariteveins and with realgar,lorandite, and getchellitein mineralizedcarbonaceous silty dolomite in the Carlin gold deposit,north-central Nevada. The mineralis namedfor Dr. CharlesL. Christof the U.S. GeologicalSurvey. The color is crimsonor deep red, but variesto bright orangein thinnerplates and crystals;the streakis bright orange,and the lusteris adamantine.The mineralis monoclinic,space group P2,/n,a -- 6.113(l),b = 16.188(4),c = 6.1Il(l) A, with0 : 96.71(2)',Z = 4, and cell volume: 600.6A8. Strongest X-ray powderdiffraction lines, in A, andtheir relative intensities are2.98 (10),3.62 (8),3.49 (6),2.692(6),2.216 (5),4.03 (6), and 3.36(5). Electronmicroprobe analyses gave Tl 35.2,Hg 35.1,As 13.1,S 16.6,sum 100.0 weight percent.The mineraloccurs in smallsubhedral to anhedralgrains which usuallylack well-developedforms but may showa bladedor flattenedhabit. Synthetic crystals are tabular, show{010) and {T0l}pinacoids, and {1l0} and {01l} prisms,and haveperfect {010}, excellent {ll0} and {001},and good {T0l} cleavages.Vickers hardness varied from 28.3-34.6and averaged31.5 kg mm-' (10 determinations).Density of syntheticTlHgAsSs is 6.2(2)(meas) and6.37g cm-e (calc).In reflectedlight christiteis grayish-whitewith a faint blue tint, lacks visiblebireflectance, is anisotropic,and has a brilliant red-orangeinternal reflection.
    [Show full text]
  • Oreshoot Zoning in the Carlin-Type Betze Orebody, Goldstrike Mine, Eureka County, Nevada
    Oreshoot Zoning in the Carlin-type Betze Orebody, Goldstrike Mine, Eureka County, Nevada By Stephen G. Peters1, Gregory C. Ferdock2, Maria B. Woitsekhowskaya1, Robert Leonardson3, and Jerry Rahn3 Open-File Report 98–620 1998 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY 1U.S. Geological Survey, Reno Field Office, Mackay School of Mines, MS-176, University of Nevada, Reno, Nevada 89557-0047 2Department of Geological Sciences, Mackay School of Mines, University of Nevada, Reno, Nevada 89557-0047 3Mine Geology Department, Barrick Goldstrike Mines, Inc., P.O. Box 29, Elko, Nevada 89803. Oreshoot Zoning in the Carlin-type Betze Orebody, Goldstrike Mine, Eureka County, Nevada by Stephen G. Peters1, Gregory C. Ferdock2, Maria B. Woitsekhowskaya1, Robert Leonardson3, and Jerry Rahn3 1U.S. Geological Survey, Reno, Nevada. 2Mackay School of Mines, University of Nevada, Reno, Nevada. 3Barrick Goldstrike Mines, Inc., Elko, Nevada Abstract Field and laboratory investigations of the giant Betze gold orebody, the largest Carlin-type deposit known, in the north-central Carlin trend, Nevada document that the orebody is composed of individual high-grade oreshoots that contain different geologic, mineralogic, and textural characteristics. The orebody is typical of many structurally controlled Carlin-type deposits, and is hosted in thin-bedded, impure carbonate or limy siltstone, breccia bodies, and intrusive or calc-silicate rock.
    [Show full text]
  • Σ24S48, a New Sulfosalt from the Vorontsovskoe Gold Deposit
    Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 3 May 2018 doi:10.20944/preprints201805.0067.v1 Peer-reviewed version available at Minerals 2018, 8, 218; doi:10.3390/min8050218 1 Tsygankoite, Mn8Tl8Hg2(Sb21Pb2Tl)Σ24S48, a new 2 sulfosalt from the Vorontsovskoe gold deposit, 3 Northern Urals, Russia 4 Anatoly V. Kasatkin1, Emil Makovicky2, Jakub Plášil3*, Radek Škoda4, Atali A. Agakhanov1, 5 Vladimir Y. Karpenko1 and Fabrizio Nestola5 6 7 1 Fersman Mineralogical Museum of Russian Academy of Sciences, Leninsky Prospekt 18-2, 119071 Moscow, 8 Russia; [email protected] (A.K.); [email protected] (A.A.); [email protected] (V.K.) 9 2 Department of Geoscience and Resource Management, University of Copenhagen, Østervoldgade 10, DK-1350, 10 Copenhagen K, Denmark; [email protected] 11 3 Institute of Physics ASCR, v.v.i., Na Slovance 1999/2, 18221 Praha 8, Czech Republic 12 4 Department of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech 13 Republic; [email protected] 14 5 Dipartimento di Geoscienze, Università di Padova, Via Gradenigo 6, I-35131, Padova, Italy; 15 [email protected] 16 * Correspondence: [email protected]; Tel. : +420-775-21-27-57 17 18 19 Abstract: Tsygankoite, ideally Mn8Tl8Hg2(Sb21Pb2Tl)Σ24S48, is a new sulfosalt discovered at the 20 Vorontsovskoe gold deposit, Northern Urals, Russia. It occurs as lath-like elongated crystals up to 21 0.2 mm embedded in calcite-dolomite-clinochlore matrix. The associating minerals also include 22 aktashite, alabandite, arsenopyrite, barite, cinnabar, fluorapatite, orpiment, pyrite, realgar, 23 routhierite, sphalerite, tilasite, titanite, etc.
    [Show full text]
  • Kobe, Japan, July 23-28
    19TH GENERAL MEETING OF THE INTERNATIONAL MINERALOGICAL ASSOCIATION KOBE, JAPAN, JULY 23-28 COMMISSION ON ORE MINERALOGY REPORT OF THE SULFOSALT SUBCOMMITTEE BY Y. MOËLO (SECRETARY) AND E. MAKOVICKY (ASSOCIATE SECRETARY) & N.N. MOZGOVA (PAST PRESIDENT OF THE SULFOSALT SUBCOMMITTEE), J.L. JAMBOR, N. COOK, A. PRING, W. PAAR, E. H. NICKEL, S. GRAESER, S. KARUP-MOLLER, T. BALIĆ-ŽUNIĆ, W. G. MUMME, F. VURRO, D. TOPA, L. BINDI, K. BENTE - 1 - SULFOSALT SUB-COMMITTEE – INTERNAL REPORT Preamble Y. Moëlo & E. Makovicky This report deals with a general reexamination of the systematics of sulfosalts. In the Part I are presented generalities concerning the definition and chemistry of sulfosalts, as well as some basic principles relative to their crystal chemical classification. Part II is a detailed presentation of all known sulfosalts species, with selected references about their definition (if recent) and crystal structure (when solved). Problems concerning the definition and nomenclature of some species are discussed on the basis of published data. This internal report will be provided to members of the C.O.M. for critical reading, in order that they may give additional information, as well as suggest corrections. A copy will also be sent to the Chairman of the CNMMN of the IMA, for information of the national representatives of this commission, who are also invited to give their comments. While Part I was written by ourselves (E. M. & Y. M.), Part II reflects a fruitful collaboration, past or present, of many specialists of sulfosalt mineralogy. Their names are given at the beginning of part II. It is a provisional list, until the final approval of the official report these co-authors; some names may be added later when relevant.
    [Show full text]
  • Ore and Gangue Mineral Paragenesis of the Cortez Hills Carlin- Type Gold Deposit, Nevada: Evidence for Coincident High-Grade Gold Deposition and Collapse Brecciation
    UNLV Theses, Dissertations, Professional Papers, and Capstones 12-1-2012 Ore and Gangue Mineral Paragenesis of the Cortez Hills Carlin- Type Gold Deposit, Nevada: Evidence for Coincident High-Grade Gold Deposition and Collapse Brecciation Lindsey R. Clark University of Nevada, Las Vegas Follow this and additional works at: https://digitalscholarship.unlv.edu/thesesdissertations Part of the Geology Commons, and the Mineral Physics Commons Repository Citation Clark, Lindsey R., "Ore and Gangue Mineral Paragenesis of the Cortez Hills Carlin-Type Gold Deposit, Nevada: Evidence for Coincident High-Grade Gold Deposition and Collapse Brecciation" (2012). UNLV Theses, Dissertations, Professional Papers, and Capstones. 1716. http://dx.doi.org/10.34917/4332697 This Thesis is protected by copyright and/or related rights. It has been brought to you by Digital Scholarship@UNLV with permission from the rights-holder(s). You are free to use this Thesis in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s) directly, unless additional rights are indicated by a Creative Commons license in the record and/ or on the work itself. This Thesis has been accepted for inclusion in UNLV Theses, Dissertations, Professional Papers, and Capstones by an authorized administrator of Digital Scholarship@UNLV. For more information, please contact [email protected]. ORE AND GANGUE MINERAL PARAGENESIS OF THE CORTEZ HILLS CARLIN- TYPE GOLD DEPOSIT, NEVADA: EVIDENCE FOR COINCIDENT HIGH-GRADE GOLD DEPOSITION AND COLLAPSE BRECCIATION by Lindsey R. Clark Bachelor of Science in Geoscience University of Nevada, Las Vegas 2009 A thesis submitted in partial fulfillment of the requirements for the Master of Science in Geoscience Department of Geoscience College of Sciences The Graduate College University of Nevada, Las Vegas December 2012 Copyright by Lindsey R.
    [Show full text]
  • Ellisite Tl3ass3 C 2001-2005 Mineral Data Publishing, Version 1
    Ellisite Tl3AsS3 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Hexagonal. Point Group: 3m (synthetic). As anhedral to irregular grains, to 1.3 mm, some having rhombohedral form; also massive. Physical Properties: Cleavage: Excellent to good, rhombohedral. Fracture: Hackly. Hardness = n.d. VHN = 36.4–44.0, 39.3 average (50 g load). D(meas.) = 7.10(5) (synthetic). D(calc.) = 7.18 Optical Properties: Opaque. Color: Dark gray; pale gray with purplish tint in polished section, with deep red to deep red-orange internal reflections. Streak: Pale brown with a tinge of orange. Luster: Metallic. Pleochroism: Very weak, in colors from pale purplish gray to pale pinkish gray. Anisotropism: From blue-purple to red-purple to brownish orange. R1–R2: (470) 31.7, (546) 29.2, (589) 28.9, (650) 28.3 Cell Data: Space Group: R3m (synthetic). a = 12.324 c = 9.647 Z = 7 X-ray Powder Pattern: Carlin mine, Nevada, USA. 2.669 (100), 3.214 (53), 5.333 (37), 2.327 (28), 3.559 (20), 1.780 (15), 2.757 (10) Chemistry: (1) (2) Tl 78.2 78.18 As 9.6 9.55 S 12.3 12.27 Total 100.1 100.00 (1) Carlin mine, Nevada, USA; by electron microprobe, average of five grains. (2) Tl3AsS3. Occurrence: In a hydrothermal gold deposit, in mineralized, argillaceous, carbonaceous dolostone beds. Association: Gold, pyrite, christite, lorandite, getchellite, realgar, arsenic, carlinite, hydrocarbons. Distribution: In the Carlin mine, 50 km northwest of Elko, Lynn district, Eureka Co., Nevada, USA. Name: Honors Dr. Albert J. Ellis (1929– ), New Zealand geochemist, Chemistry Division, Department of Scientific and Industrial Research, New Zealand.
    [Show full text]
  • Rich Pyrite Luke L. Georgea*, Cristian Biagionia
    1 2 3 The speciation of thallium in (Tl,Sb,As)-rich pyrite 4 1 5 6 2 7 8 9 3 Luke L. Georgea*, Cristian Biagionia†, Giovanni Orazio Leporeb, Maria Lacalamitaa, 10 11 4 Giovanna Agrosìc, Gian Carlo Capitanid, Elena Bonaccorsia, Francesco d’Acapitob 12 13 5 14 15 6 a Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, I-56126 Pisa, Italy 16 17 7 b CNR-IOM-OGG, 71 Avenue des Martyrs, F-38043 Grenoble, France 18 19 8 c Dipartimento di Scienze della Terra e Geoambientali, Università degli Studi di Bari “Aldo Moro”, 20 21 9 via Orabona 4, I-70125 Bari, Italy 22 23 10 d Dipartimento di Scienze dell’Ambiente e di Scienze della Terra, Università degli Studi di Milano- 24 25 11 Bicocca, Piazza della Scienza 4, I-20126 Milano, Italy 26 27 12 28 29 Abstract 30 13 31 32 14 Three samples of (Tl,Sb,As)-rich pyrite from the ore deposits of southern Apuan Alps (Tuscany, Italy) 33 34 15 were studied through a multi-technique approach in order to constrain the speciation and incorporation 35 36 16 mechanism of thallium in pyrite. High concentrations of Tl, Sb, and As were detected in all the studied 37 38 17 samples through laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS). Average 39 40 18 Tl contents were 1,299 ppm, 1,967 ppm, and 2,623 ppm in samples from Sennari, Canale della Radice, 41 42 19 and Fornovolasco, respectively. The LA-ICP-MS time-resolved down-hole ablation profiles were 43 44 20 smooth indicating that Tl, Sb, and As are dissolved in the pyrite matrix, or occur in homogeneously 45 46 21 distributed nanoparticles (NPs).
    [Show full text]
  • Getchellite Assbs3 C 2001-2005 Mineral Data Publishing, Version 1
    Getchellite AsSbS3 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic. Point Group: 2/m. As subhedral crystals, to 2 cm, commonly bent; massive. Physical Properties: Cleavage: Perfect micaceous on {001}, yielding flexible, inelastic lamellae. Fracture: Splintery. Tenacity: Flexible to some degree, but inelastic. Hardness = 1.5–2 VHN = n.d. D(meas.) = 3.92 D(calc.) = 3.98 (synthetic). Optical Properties: Transparent. Color: Dark blood-red, tarnishes to green to purple iridescence. Streak: Red-orange. Luster: Pearly to vitreous on cleavage surfaces, otherwise resinous. Optical Class: Biaxial (+). Orientation: Z = b; Y ∧ a = 15(5)◦; Y ∧ c = 101(5)◦. Dispersion: r> v,strong, crossed. α = > 2.72 (Li). 2V(meas.) = < 46◦ Anisotropism: Weak. R1–R2: (400) 34.8–37.9, (420) 34.2–37.4, (440) 33.6–36.9, (460) 32.7–36.0, (480) 31.8–34.8, (500) 30.7–33.5, (520) 29.5–31.9, (540) 28.1–30.6, (560) 27.0–29.4, (580) 26.2–28.6, (600) 25.7–28.0, (620) 25.2–27.4, (640) 24.9–27.0, (660) 24.5–26.8, (680) 24.2–26.5, (700) 23.8–26.1 Cell Data: Space Group: P 21/a. a = 11.949(3) b = 9.028(1) c = 10.130(2) β = 116.15(1)◦ Z=8 X-ray Powder Pattern: Zarehshuran, Iran. 3.66 (100), 2.915 (100), 2.880 (100), 4.96 (80), 4.46 (80), 2.815 (80), 4.08 (60) Chemistry: (1) (2) (3) As 25.09 26.50 25.59 Sb 42.04 41.80 41.57 S 32.82 34.30 32.84 Total 99.95 102.60 100.00 (1) Getchell mine, Nevada, USA; average of several analyses.
    [Show full text]