Ferrilotharmeyerite. a New Ca Zn Fe3* Hydroxvl

Total Page:16

File Type:pdf, Size:1020Kb

Ferrilotharmeyerite. a New Ca Zn Fe3* Hydroxvl Canadion Mineralogist Vol. 30, pp.215-217 (1992) FERRILOTHARMEYERITE.A NEW CA_ZN_FE3*HYDROXVL ARSENATE FROM TSUMEB,NAMIBIA1 H. GARY ANSELL ANDANDREW C. ROBERTS GeologicalSuney of Canado,601 Booth Street,Ottowa, Ontario KIA 0E8 PETE J. DUNN Departmentof Mineral Sciences,Smithsonion Institution, Washington,D,C, 20560,U.S.A, WILLIAM D. BIRCH Deportmentof Mineralogyand Petrology,Museum of Victoria,Melbourne, Victoria 3000, Australia VALERIE E. ANSELL 22 Fairhill Crescent,Nepean, Ontario K2G 187 JOEL D. GRICE Mineral SciencesSection, Canadion Museum of Nature, Ottawa,Ontario KIP 6P4 ABSTRACT Keywords: ferrilotharmeyerite, calcium zinc ferric iron hydroxyl arsenate,new mineral species,X-ray data, Ferrilotharmeyerite occurs at the Tsumeb mine, chemicalcomposition, Tsumeb mine, Namibia. Tsumeb, Namibia, as multiple subhedralcrystallites and as tabular to wedge-or lozenge-shapedcrystals associated SouvernE with tennanXite,scorodite, conichalcite, schneiderh6hnite and beudantite.The mineral is monoclinic, spacegroup A, Cm or A/m (diffraction aspectC*/*), with refinqd La ferrilotharmeyerite,nouvelle espdcemindrale pro- unit-cell parametersa 8.9!!(7), b 6.236(2),c 7.390(3)A, venantde la mine Tsumeb, en Namibie, est pr6sentesous P 115.74(4)',V373.5(5) N, o:b;c1.443:l:1.185, Z = 2. forme de petits cristaux sub-idiomorphesou en tablettes The strongestseven liner of the X-ray powder-diffraction ou en losanges,associds i tennantite,scorodite, conichal- pattern [d_ in ND&k}] _are: 4.95(70)(ll0), cite, schneiderhcihniteet beudantite.Elle est monoclini- 3.398(100X202), 3.175(190)(ll2), 2.93_8(100)(201),que,. groupe spatial c2, cm ou a/m (aspect de 2.823(70)(02r),2.7 02(7 0)(3t r), 2.544(l00tp2l). The crys- diffraction C*l*); les parambtres r6ticglaires ont 6te tallites are transparent to translucent, medium to affi n6s:a 8.227(7), b 6.236(2),c 7.390(3)A\ P | | 5.74(4)", brownish yellow with an adamantineto greasylustre and V373.5(5)N,a:b:c 1.u93:l:1.185,Z = 2.Lesseptraies a paleyellow streak.The mineralis brittle, with an uneven les plus intensesdu clich6 de diffraction (m6thode des fracture and a good [001]-cleavage.D(meas.) 4.25(5), poudres) ld en A(I)(hkl)J sonr: 4.95(70)(110), D(calc,) 4.25 and 4,38 g/cm'for two empirical formulas. 3.398(l@X2@), 3.r75(l00X1la, 2.938(100)(201), Optically,the mineralis.biaxial positive, with o 1.811(5), 2.823(70)(02r),2.702(70)(311),2.su(r0o)Q21).Lespetits B 1.844(5), r I .88(l), 2V(meas.)85(5)', 2 Z(calc.) 89", X cristaux sont transparentsir translucides,jaune moyen ir y approximatelyIl o, | | b. Pleochroismis strong: X jaune brunitre, avec un 6clat adamantin ou glas et une olive green, Y pale green, Z colorless.Absorption is X rayure jaune pdle. C'est un min6ral cassant dont la > f >> Z. lnclined dispersion of the optic axes is lracture est irr€gulidre; le clivage [001] est bon. Densit6 distinct, r > v. The ideal chemical formula is 4.25(5)(mesur6e),4.25 et 4.38 (valeurscalcul6es pour les Ca(Zn,Cu)(Fe3+,Zn)(AsO3OH)z(OH)s,derived from deux formulesempiriques). Biaxe positif, aveco l.8l l(5), electron-microprobeanalyses, water determination and p 1.844(5),y 1.88(l),2Z(mes.) 85(5)",2V(calc.) 89", X microchemicaltests. Ferrilotharmeyerite is the ferric iron y i peu prds ll a, I I b. Le pl6ochroismeest intense: X analogueof lotharmeyerite,and is named to reflect this vert dlive, Yvert pAle,Z incolore. L'absorption est X > relationship. Y >> Z. La dispersion inclinde des axes optiques est distincte, | ^> v. La formule chimique id6ale, Ca(Zn,CuXFe'*,Zn)(AsO3OH)z(OH):, est ddriv6e de donn€es obtenues ir la microsonde des rGeological dlectronique, Survey of Canada contribution number d6terminations de la teneur en H2O, et de tests 15690. rnicrochimiques. Le ferrilotharmeyerite est I'analogue 225 226 THE CANADIAN MINERALOGIST ferrifdrede la lotharmeyerite,et son nom t6moignede 7.38 A, I115.57', Thesedata are consistentwith cetterelation. those reported for lotharmeyeriteby Kampf et al. (1984).Because upperJevel precession photography (Traduitpar la R6daction) was impossibleand the X-ray powder patterns of Mots-cl6s:ferrilotharmeyerite, arsenate de calcium,zinc, the two mineralsare very similar, it was decidedto fer ferrique hydroxyl6,nouvelle espbce min€rale, index the powder pattern of ferrilotharmeyeriteby donndesaux rayonsX, compositionchimique, mine analogy with the powder data provided for deTsumeb, Namibie. lotharmeyeriteby Kampf et ql. (1984).Ferrilothar- meyerite crystals from specimenM38092 are also INTRoDUCTIoN unsuitable for single-crystalprecession study. The X-ray powder-diffraction data for specimen A new mineral, ferrilotharmeyerite, has been NMC 64573 (Table 1) were refined qsing twelve identified on a specimen (NMC 64573) in the reflectionsbetween 3.5M and 1.559 A for which National Mineral Collection of the Geological unambiguousindexing was possible. The refined Survey of Canada. The sample was collected in unit-cellparameters are:. a 8.997(7),b 6.?36Q),c 1983by John Innes, from the Tsumebmine (32 7.390(3)i\ I ttS.lq@)', V 373.5(5)N, a:b:c level, W40 stope), Tsumeb, Namibia. The mineral 1.443:l:1.185,with Z : 2. The'possiblespace- occursas multiple subhedralcrystallites, averaging groups, also by analogy, are C2, Cm or C2/m 0.2 mm in length, with crudelyformed facesslightly (diffraction aspectC'r'lx'). The cell parametersand elongatein the b direction. The matrix appearsto cell volume are slightly lower than those reported be feldspathicquartzite showingpervasive staining by Kampf et al. (1984) for lotharmeyerite. Con- by hematite. Ferrilotharmeyeriterims conichalcite tributing factors for the smaller unit cell are the and is in contact with tennantite. Large crystalsof small but significant- differences in ieni! radii scorodite and schneiderhdhnitealso occur on the berweenFe3* (0.64 g) and Mn3* (0.66^A), and specimen. berweenCu2* (0.72 A) and zn2^ (0.74 A). After most of the data needed to define the specieshad been obtained on the NMC specimen, PHYSICAL AND OPTICAL PROPERTIES additional ferrilotharmeyerite from the same locality was found on a specimen of massive tennantite and calcite from the Museum of Ferrilotharmeyerite on specimen NMC 64573 Victoria, Melbourne, Australia (M38092). This occursas subhedralcrystals, averaging 0.2 mm in specimenhas a 7 x 7 cm crust of dark brown TABLE I. X.RAY POWDER DATA FOR TERRIII'TIIARMTIERIIts tabular beudantitecrystals up to I mm across,and yellowish brown ferrilotharmeyeritecrystals up to /est. d(tu6.) d(elc.) hH /sL d(m6) l(€lc) hkl about 0.6 mm in size. The water analysis for ferrilotharmeyerite was obtained from this 30 6.66 6.66 001 5 L010 2'069 311 specimenbecause of the dearth of material on the 70 4.95 494 110 5 LV6 LM6 400 NMC specimen. 30 4.60 4.59 trT , 1.988 ri s r.983 'I The mineral is the ferric iron analogue of 10 4,44 4.42 zu 1.986 403 _; lotharmeyerite(Dunn 1983,Kampf et al. 1984)and 20 3544 3544 tt1 5 1.9X 1,E24 is named to reflect this relationship. The mineral 100 3398 3395 z6 . 1.850 30 1.U7 |'rs47 and mineral name have been approved by the 100 3.175 3.t'78 ttz M Commissionon New Minerals and Mineral Names. m 3.118 0m , tar2 tn 20 r.8ll I' I.M.A. The two specimensdescribed above have 100 2.938 L940 ml 1t08 u23 been designatedcotype, and are the only known '10 2.92i 2.p4 al rc 1n3 1J7Z D, specimensof ferrilotharmeyerite. 70 2.74 2.7V :ri ' l72l tra 50 1.701 '1.7m| ..; lm 2544 2541 /21 , 2.414 1\2 1"-" 6At 312 X-RAY CRYSTALLoGRAPHY 50 2.475 | so ten [ '2.471 /20 ' 1.675 423 t0 2297 2.296 m 20 1J89 1589 24 Precessionstudies were undertaken on several , zn6 972 30 1J59 1J59 040 fragments r0 2.26 | of ferrilotharmeyerite0.1 to 0.2 mm in '2260 rrl . 1J19 42r. 20 1518 '| size from NMC 64573,but in all casesorientation , 2.2t9 003 1509 r0 2210 | - photographs indicate that single-crystalmultiple '2204 402 . 1.469 23 30 1.468 |'1-468 crystallitesare present.Even the smallestfragment .2.154 2A ffi 20 2.147 | is composedof at leastfour individuals. Neverthe- , 2.139 Z2l less,lr0land b" L20l' photographsofonefragment clearly show monoclinic symmetry and gave - I 14.6 m Debye-schere! powder @e&, Gr adiadotr Ni-filter (lGttro 1J4178 A) - in@miti6 estimatedvisually, valu6 of^d quoted h A measuredunit-cell parameters:o 8.98, b 6.23, c - indsed with a 8.99'7,b 6136,c'1390 A-B 115.74" FERRILOTHARMEYERITEFROM TSUMEB 227 size,in randomly orientedto subparallelaggregates bourne, Australia, provided the water analysisby up to 3 mm in maximum dimension. The crystals CHN Analyzer. Microchemicaltests were negative are transparent, medium yellow to brownish for Fe2+and positivefor Fe3*. yellow, with an adamantinelustre and a very pale The empirical formula for NMC 64573,on the yellow streak. For M38092,the ferrilotharmeyerite basis of As 2, is Cat.x5(Zn6.62Cuo.rr)rr.oo crystals are tabular to wedge- or lozenge-shaped, (Fe6.s7Zn6.1a)s1.61[AsO3.1e(OH)0.e0]2(OH)2.80.The averageabout 0.6 mm in size, and are commonly empirical formula for M38092, on the basisof As intergrown with beudantite. These crystals are 2, is (Ca6.e2Pbs.65)p6.er(2n6.66Cu6.3a)p1.* translucent,with a greasylustre and a pale yellow (Fe6.332n6.154.le.er)gq.eIAsO:.ar (OH)o.ss]z(OH)r.s0. streak. The mineral is brittle, with an uneven By analogy with lotharmeyerite, the idealized fracture and a good {001} cleavage.The Mohs formula is Ca(Zn,Cu)(Fe3",ZnXAsojoH)2(oH)3.
Recommended publications
  • Mineral Processing
    Mineral Processing Foundations of theory and practice of minerallurgy 1st English edition JAN DRZYMALA, C. Eng., Ph.D., D.Sc. Member of the Polish Mineral Processing Society Wroclaw University of Technology 2007 Translation: J. Drzymala, A. Swatek Reviewer: A. Luszczkiewicz Published as supplied by the author ©Copyright by Jan Drzymala, Wroclaw 2007 Computer typesetting: Danuta Szyszka Cover design: Danuta Szyszka Cover photo: Sebastian Bożek Oficyna Wydawnicza Politechniki Wrocławskiej Wybrzeze Wyspianskiego 27 50-370 Wroclaw Any part of this publication can be used in any form by any means provided that the usage is acknowledged by the citation: Drzymala, J., Mineral Processing, Foundations of theory and practice of minerallurgy, Oficyna Wydawnicza PWr., 2007, www.ig.pwr.wroc.pl/minproc ISBN 978-83-7493-362-9 Contents Introduction ....................................................................................................................9 Part I Introduction to mineral processing .....................................................................13 1. From the Big Bang to mineral processing................................................................14 1.1. The formation of matter ...................................................................................14 1.2. Elementary particles.........................................................................................16 1.3. Molecules .........................................................................................................18 1.4. Solids................................................................................................................19
    [Show full text]
  • MINERALIZATION in the GOLD HILL MINING DISTRICT, TOOELE COUNTY, UTAH by H
    MINERALIZATION IN THE GOLD HILL MINING DISTRICT, TOOELE COUNTY, UTAH by H. M. EI-Shatoury and J. A. Whelan UTAH GEOLOGICAL AND MINERALOGIC~4L SURVEY affiliated with THE COLLEGE OF MINES AND MINERAL INDUSTRIES University of Utah~ Salt Lake City~ Utah Bulletin 83 Price $2.25 March 1970 CONTENTS Page ABSTRACT. • • . • . • . • . • • . • . • . • • • . • • . • . • .. 5 INTRODUCTION 5 GENERAL GEOLOGY. .. 7 ECONOMIC GEOLOGY. 7 Contact Metasomatic Deposits. 11 Veins. • . 11 Quartz-Carbonate-Adularia Veins 11 Quartz Veins . 15 Calcite Veins. 15 Replacement Deposits . 15 Replacement Deposits in the Ochre Mountain Limestone 15 Replacement Deposits in the Quartz Monzonite 17 HYDROTHERMAL ALTERATION. 17 Alteration of Quartz Monzonite. • 17 Alteration of Limestones. 22 Alteration of the Manning Canyon Formation 23 Alteration of the Quartzite. 23 Alteration of Volcanic Rocks. 23 Alteration of Dike Rocks. 23 Alteration of Quartz-Carbonate Veins . 23 OXIDATION OF ORES. 23 Oxidation of the Copper-Lead-Arsenic-Zinc Replacement Deposits 24 Oxidation of Tungsten and Molybdenum Deposits. 24 Oxidation of the Lead-Zinc Deposits 25 MINERALOGY. 25 CONTROLS OF MINERAL LOCALIZATION 25 ZONAL ARRANGEMENT OF ORE DEPOSITS. 25 GENESIS OF ORE DEPOSITS. 29 DESCRIPTION OF PROPERTIES. 29 The Alvarado Mine. 29 The Cane Spring Mine 30 The Bonnemort Mine 32 The Rube Gold Mine . 32 The Frankie Mine 32 The Yellow Hammer Mine 33 The Rube Lead Mine . 34 FUTURE OF THE DISTRICT AND RECOMMENDATIONS. .. 34 ACKNOWLEDGMENTS. .. 36 REFERENCES. • . .. 36 2 ILLUSTRATIONS Page Frontis piece Figure I. Index map showing location and accessibility to the Gold Hill mining district, Utah . 4 2. Geologic map of Rodenhouse Wash area, showing occurrence of berylliferous quartz-carbonate-adularia veins and sample locations.
    [Show full text]
  • Ferrilotharmeyerite Ca(Fe3+,Zn,Cu)
    3+ Ferrilotharmeyerite Ca(Fe , Zn, Cu)2(AsO4)2(OH, H2O)2 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic. Point Group: 2/m. As subhedral crystals, to 0.6 mm, tabular on {101}, slightly elongated along [010], wedge- or lozenge-shaped, terminated by {111}, composed of multiple crystallites. Physical Properties: Cleavage: Good on {001}. Fracture: Uneven. Tenacity: Brittle. Hardness = ∼3 D(meas.) = 4.25(5) D(calc.) = 4.21–4.38 Optical Properties: Transparent to translucent. Color: Yellow, brownish yellow, yellowish brown. Streak: Very pale yellow. Luster: Adamantine to greasy. Optical Class: Biaxial (+). Pleochroism: Strong; X = olive-green or orange; Y = pale green or yellow; Z = colorless. Orientation: X = b; Y ∧ c = ∼22◦. Dispersion: r> v,distinct, inclined. Absorption: X > Y Z. α = 1.83(1) β = [1.835] γ = 1.87(1) 2V(meas.) = 40◦ Cell Data: Space Group: C2/m. a = 8.997–9.010 b = 6.236–6.246 c = 7.387–7.391 β = 115.52−115.74◦ Z=2 X-ray Powder Pattern: Tsumeb, Namibia. 3.398 (100), 3.175 (100), 2.938 (100), 2.544 (100), 4.95 (70), 2.823 (70), 2.702 (70) Chemistry: (1) (2) As2O5 48.66 48.73 Al2O3 0.13 < 0.1 Fe2O3 13.96 15.68 CuO 5.75 < 0.1 ZnO 13.94 17.88 PbO 2.13 0.14 CaO 10.86 12.07 H2O 5.85 [5.80] Total 101.28 [100.30] (1) Tsumeb, Namibia; by electron microprobe, H2O by CHN analyzer; corresponds to (Ca0.92Pb0.05)Σ=0.97(Fe0.87Zn0.81Cu0.34Al0.01)Σ=2.03(AsO4)2(OH, H2O)2.
    [Show full text]
  • On the Symmetry of Tsumcorite Group Minerals Based on the New Species Rappoldite and Zincgartrellite
    Mineralogical Magazine, December 2000, Vol. 64(6), pp. 1109-1126 On the symmetry of tsumcorite group minerals based on the new species rappoldite and zincgartrellite H. EFFENBERGERI,*, W. KRAUSE2, H.-J. BERNHARDT3 AND M. MARTIN4 I Institut fUr Mineralogie und Kristallographie, Universitat Wien, Althanstra~e 14, A-I090 Vienna, Austria 2 Henriette-Lott-Weg 8, 0-50354 Hiirth, Gennany 3 Ruhr-Universitat Bochum, Institut fUr Mineralogie, Universitatsstraf.le 150, 0-44780 Bochum, Germany 4 Heinrich-Zille-Weg 8, 0-09599 Freiberg, Germany ABSTRACT Rappoldite, the Co-analogue of helmutwinklerite, and zincgartrellite, the Zn-dominant analogue of gartrellite, are two new members of the tsumcorite group. Both minerals are triclinic, their structures are closely related to the parent structure, i.e. the 'tsumcorite type' (C2/m, Z = 2). The lower symmetry is caused by two different crysta,l-ch~mical requirements. Order :Bhenomen~+ o.f the hydrogen bonds cause the 'helmutwmklente type (PI, Z = 4), ordenng of Cu and Fe' IS responsible for the 'gartrellite type' (PI, Z = I). Rappoldite was found on samples from the Rappold mine near Schneeberg, Saxony, Gennany. The new species fonns red to red-brown prismatic and tabular crystals up to I mm long. Deale. = 5.28 g/cm3. 2Vz = 85(5r, nx = 1.85 (calc.), ny = 1.87(2) and nz = 1.90(2); dispersion is distinct with r > v; orientation is Y -II [120] and X - c. The empirical fonnula derived from electron microprobe analyses II is (Pb 1.01Cao.ol h: 1.02(COO99Nio 62ZnO.35FeO.02h:1.9S[(As04)199(S04)001h:2.00[(OH)0.02(H20) I 98h:2.00 or Pb(Co,Nih(As04h.2H20.
    [Show full text]
  • Topographical Index
    997 TOPOGRAPHICAL INDEX EUROPE Penberthy Croft, St. Hilary: carminite, beudantite, 431 Iceland (fsland) Pengenna (Trewethen) mine, St. Kew: Bondolfur, East Iceland: pitchsbone, beudantite, carminite, mimetite, sco- oligoclase, 587 rodite, 432 Sellatur, East Iceland: pitchs~one, anor- Redruth: danalite, 921 thoclase, 587 Roscommon Cliff, St. Just-in-Peuwith: Skruthur, East Iceland: pitchstonc, stokesite, 433 anorthoclase, 587 St. Day: cornubite, 1 Thingmuli, East Iceland: andesine, 587 Treburland mine, Altarnun: genthelvite, molybdenite, 921 Faroes (F~eroerne) Treore mine, St. Teath: beudantite, carminite, jamesonite, mimetite, sco- Erionite, chabazite, 343 rodite, stibnite, 431 Tretoil mine, Lanivet: danalite, garnet, Norway (Norge) ilvaite, 921 Gryting, Risor: fergusonite (var. risSrite), Wheal Betsy, Tremore, Lanivet: he]vine, 392 scheelite, 921 Helle, Arendal: fergusonite, 392 Wheal Carpenter, Gwinear: beudantite, Nedends: fergusonite, 392 bayldonite, carminite, 431 ; cornubite, Rullandsdalen, Risor: fergusonite, 392 cornwallite, 1 Wheal Clinton, Mylor, Falmouth: danal- British Isles ire, 921 Wheal Cock, St. Just-in- Penwith : apatite, E~GLA~D i~D WALES bertrandite, herderite, helvine, phena- Adamite, hiibnerite, xliv kite, scheelite, 921 Billingham anhydrite mine, Durham: Wheal Ding (part of Bodmin Wheal aph~hitalite(?), arsenopyrite(?), ep- Mary): blende, he]vine, scheelite, 921 somite, ferric sulphate(?), gypsum, Wheal Gorland, Gwennap: cornubite, l; halite, ilsemannite(?), lepidocrocite, beudantite, carminite, zeunerite, 430 molybdenite(?),
    [Show full text]
  • Colorado Ferberite and the Wolframite Series A
    DEPARTMENT OF THE INTERIOR UNITED STATES GEOLOGICAL SURVEY GEORGE OT1S SMITH, DIRECTOR .jf BULLETIN 583 \ ' ' COLORADO FERBERITE AND THE r* i WOLFRAMITE SERIES A BY FRANK L. HESS AND WALDEMAR T. SCHALLER WASHINGTON GOVERNMENT FEINTING OFFICE 1914 CONTENTS. THE MINERAL RELATIONS OF FERBERiTE, by Frank L. Hess.................. 7 Geography and production............................................. 7 Characteristics of the ferberite.......................................... 8 " Geography and geology of the Boulder district........................... 8 Occurrence, vein systems, and relations................................. 9 Characteristics of the ore.............................................. 10 Minerals associated with the ferberite................................... 12 Adularia.......................................................... 12 Calcite........................................................... 12 Chalcedony....................................................... 12 Chalcopyrite...................................................... 12 Galena........................................................... 12 Gold and silver.................................................... 12 Hamlinite (?).................................................... 14 Hematite (specular)................................................ 15 Limonite........................................................ 16 Magnetite........................................................ 17 Molybdenite..................................................... 17 Opal............................................................
    [Show full text]
  • Mottramite, Descloizite, and Vanadinite) in the Caldbeck Area of Cumberland
    289 New occurrences of vanadium minerals (mottramite, descloizite, and vanadinite) in the Caldbeck area of Cumberland. By ART~VR W. G. KINGSBURu F.G.S., Dept. of Geology and Mineralogy, University Museum, Oxford, and J. HARTLnY, B.Sc., F.G.S., Dept. of Geology, University of Leeds. [Taken as read 10 June 1954.] Summary.--Four new occurrences of vanadium minerals are described. New X-ray powder data are given for descloizite and mottramite, and show appreciable differences. Evidence is brought that the original occurrence of mottramite was not at Mottram St. Andrew, Cheshire, but Pim Hill, Shropshire, and that most if not all specimens labelled Mottram St. Andrew or Cheshire really came from Pim Hill. ANADIUM minerals are rare in the British Isles, and only two V species, mottramite (Cu, Zn)PbV0tOH and vanadinite Pbs(VO4)aC1, have so far been recorded from a limited number of localities. We do not include the vanadiferous nodules from Budleigh Salterton in Devon, as the vanadiferous mineral has not been identified. Mottramite, supposedly from Mottram St. Andrew in Cheshire, was first described in 1876,1 but we have evidence (below, p. 293) that the locality was in fact Pim Hill in Shropshire. ~ Vanadinite has so far only been found at Leadhills and Wanlockhead in Scotland. Vauquelinite has been de- scribed from Leadhills and Wanlockhead,a but the specimens have since been shown to be mottramite. 4 As a result of our investigations in the Lake District, we have found several new localities in the Caldbeck area for raottramite, deseloizite, and vanadinite. Higher part of Brandy Gill, Carroek Fell.
    [Show full text]
  • Cu-Rich Members of the Beudantite–Segnitite Series from the Krupka Ore District, the Krušné Hory Mountains, Czech Republic
    Journal of Geosciences, 54 (2009), 355–371 DOI: 10.3190/jgeosci.055 Original paper Cu-rich members of the beudantite–segnitite series from the Krupka ore district, the Krušné hory Mountains, Czech Republic Jiří SeJkOra1*, Jiří ŠkOvíra2, Jiří ČeJka1, Jakub PláŠIl1 1 Department of Mineralogy and Petrology, National museum, Václavské nám. 68, 115 79 Prague 1, Czech Republic; [email protected] 2 Martinka, 417 41 Krupka III, Czech Republic * Corresponding author Copper-rich members of the beudantite–segnitite series (belonging to the alunite supergroup) were found at the Krupka deposit, Krušné hory Mountains, Czech Republic. They form yellow-green irregular to botryoidal aggregates up to 5 mm in size. Well-formed trigonal crystals up to 15 μm in length are rare. Chemical analyses revealed elevated Cu contents up 2+ to 0.90 apfu. Comparably high Cu contents were known until now only in the plumbojarosite–beaverite series. The Cu 3+ 3+ 2+ ion enters the B position in the structure of the alunite supergroup minerals via the heterovalent substitution Fe Cu –1→ 3– 2– 3 (AsO4) (SO4) –1 . The unit-cell parameters (space group R-3m) a = 7.3265(7), c = 17.097(2) Å, V = 794.8(1) Å were determined for compositionally relatively homogeneous beudantite (0.35 – 0.60 apfu Cu) with the following average empirical formula: Pb1.00(Fe2.46Cu0.42Al0.13Zn0.01)Σ3.02 [(SO4)0.89(AsO3OH)0.72(AsO4)0.34(PO4)0.05]Σ2.00 [(OH)6.19F0.04]Σ6.23. Interpretation of thermogravimetric and infrared vibrational data is also presented. The Cu-rich members of the beudan- tite–segnitite series are accompanied by mimetite, scorodite, pharmacosiderite, cesàrolite and carminite.
    [Show full text]
  • 17.05XA and a ~ 7.240, C ~ 17054 A
    008-05 008-07 Isomorphism: The implications of understanding structural changes at Crystal-chemical behaviour of Ge and Ga in Ph-Fe members of the alunite extreme physical conditions supergroup S. J. Mills"', U. Kolitsch4 and W. D. Bircho Hirovuki Horiuchi I Earth Sciences Laboratory, Faculty of Education, Hirosaki University, School of Em1h Sciences, The University of Melboul11e. Parkville 30 IO. Victoria, Bunkyo-I, Hirosaki, Aomori 036-8560, Japan Australia.o Gcosciences, Muscum Victoria. GPO Box 666. Melboul11c 300 I. Victoria, Australia. Structural behaviors of minerals at extreme physical conditions havc been oftcn 4'CSIRO Minerals, Box 312. Cla}10n South 3169, Victoria. Australia. discussed with reference to isomorphism. Although they may not show actual Institut flir Mineralogie und Kristallographie, Universitiit Wien, Geozentrum, structural aspects necessarily, however, those observed at relatively lower Althanstralk 14, Wicn A-I 090, Austria. pressures and/or temperatures, even at ambient conditions, will give us a SI11iIls(t?)museum. vie.gov.au significant implication to the intcrpretation of structural behaviors wbich will appear at difficult experimental conditions. Jarositc-like Pb-Fc arsenates. phosphates, sulphates and their solid solutions exist Minerals in the transition zone and/or the lower pm1 of the earth's mantle have widely in nature and form part of the AB1(X04HOH,HoOJc, alunite supergroup been also investigated by various isomorphic substances. Co,Si04 is one of (space group R-3m). In this supergroup the A site can be occupied by monovalent examples which showed the transf,xmation from olivine- to spinel-type phase Na. K, Ag, NH4 or H,O, divalent Pb, Ca.
    [Show full text]
  • 12. Supergene Ore and Gangue Characteristics
    12. Supergene Ore and Gangue Characteristics By Randolph A. Koski 12 of 21 Volcanogenic Massive Sulfide Occurrence Model Scientific Investigations Report 2010–5070–C U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior KEN SALAZAR, Secretary U.S. Geological Survey Marcia K. McNutt, Director U.S. Geological Survey, Reston, Virginia: 2012 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report. Suggested citation: Koski, R.A., 2012, Supergene ore and gangue characteristics in volcanogenic massive sulfide occurrence model: U.S. Geological Survey Scientific Investigations Report 2010–5070 –C, chap. 12, 6 p. 183 Contents Mineralogy and Mineral Assemblages ..................................................................................................185 Paragenesis and Zoning Patterns ...........................................................................................................185
    [Show full text]
  • Raman Spectroscopy of Selected Tsumcorite Pb (Zn, Fe3+) 2 (Aso4) 2
    This may be the author’s version of a work that was submitted/accepted for publication in the following source: Frost, Ray& Xi, Yunfei (2012) Raman spectroscopy of selected tsumcorite Pb(Zn,Fe3+)2(AsO4)2(OH,H2O) minerals-Implications for arsenate accumulation. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 86, pp. 224-230. This file was downloaded from: https://eprints.qut.edu.au/47766/ c Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the docu- ment is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recog- nise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to [email protected] License: Creative Commons: Attribution-Noncommercial-No Derivative Works 2.5 Notice: Please note that this document may not be the Version of Record (i.e. published version) of the work. Author manuscript versions (as Sub- mitted for peer review or as Accepted for publication after peer review) can be identified by an absence of publisher branding and/or typeset appear- ance. If there is any doubt, please refer to the published source. https://doi.org/10.1016/j.saa.2011.10.028 3+ 1 Raman spectroscopy of selected tsumcorite Pb(Zn,Fe )2(AsO4)2(OH,H2O) 2 minerals –implications for arsenate accumulation 3 4 Ray L.
    [Show full text]
  • Tsumcorite Pb(Zn,Fe3+)
    3+ Tsumcorite Pb(Zn, Fe )2(AsO4)2(OH, H2O)2 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic. Point Group: 2/m. Crystals are prismatic, elongated along [010], wedge-shaped, showing {201}, {401}, {001}, {111}, to 5 mm, in radiating sheaves and spherulites, may be feathery, aggregated into crusts, earthy, powdery. Twinning: Common, on a unknown law. Physical Properties: Cleavage: On {001}, good. Hardness = 4.5 D(meas.) = 5.2 D(calc.) = 5.39 Optical Properties: Semitransparent. Color: Bright yellow, orange, yellowish brown, red, red-brown. Streak: Yellow. Luster: Vitreous. Optical Class: Biaxial. Pleochroism: Weak; X = Z = pale yellow; Y = yellow. Orientation: Y = b; X ∧ c =8◦–15◦. Dispersion: r> v,weak. α = 1.87–1.91 β = 1.89–1.93 γ = 1.92–1.96 2V(meas.) = 67◦–83.5◦ Cell Data: Space Group: C2/m. a = 9.117–9.163 b = 6.321–6.347 c = 7.577–7.611 β = 115.07◦−115.45◦ Z=2 X-ray Powder Pattern: Tsumeb, Namibia. 3.244 (100), 4.663 (90), 2.863 (90), 2.742 (70), 3.021 (60), 2.573 (50), 2.540 (40) Chemistry: (1) (2) (1) (2) (1) (2) As2O5 34.80 36.20 CuO 1.50 0.15 CaO 0.98 < 0.1 Fe2O3 10.62 ZnO 14.69 14.97 H2O 4.40 [4.44] FeO 10.99 PbO 31.66 33.39 Total 99.13 [99.77] Ge 0.09 MgO 0.02 (1) Tsumeb, Namibia; H2O confirmed by IR. (2) Do.; by electron microprobe, average of 19 analyses, total Fe as Fe2O3, confirmed by IR and M¨ossbauerspectroscopy, H2O from theory; corresponds to Pb0.95(Zn1.17Fe0.85)Σ=2.02(AsO4)2.01[(OH)0.70(H2O)1.17]Σ=1.87.
    [Show full text]