DOCSLIB.ORG

Antimony Occurrences Washington

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Antimony Occurrences Washington State of Washington ARTHUR B. LANGLIE, Governor Department of Conservation and Development JACK V. ROGERS, Director DIVISION OF MINES AND GEOLOGY SHELDON L. GLOVER, Supervisor Bulletin No. 39 ANTIMONY OCCURRENCES OF WASHINGTON by C. PHILLIPS PURDY, JR. STATE PAINTING PLANT OI_VMPIA . WASH . 1951 For sale by Department of Conservation a nd Development, Olympia, Washington. J>rice, one dollar. Corrections to Division of Mines and Geology Bulletin No . 39 Page 37 - line 6, the word 11 Ha.gnesian11 should precede the word "Amphiboles. 11 Page 37 - line 8, should read "temperatures and pressures in the silica rich solutions of a neutral, weakly acid, 11 Page 56 - line 15, 11 oervanite," should be spelled "cervantite. 11 CONTENTS Page Introduction . 7 Acknowledgments . 9 Properties, treatment, uses, and consumption of antimony........ ..... 10 Physical properties .... ........................................ 10 Chemical properties . • . 11 Treatment . 12 Uses and consumption . 12 Lead-antimony alloys 12 Antimony compounds . • . 14 The antimony market and outlook . 15 Antimony minerals of Washington and their identHication. • . 16 Native antimony . 17 Antimonide . • . 17 Dyscrasite . 17 Sulfides . 18 Stibnite . 18 Kermesite . 20 Sulfosalts . 20 Polybasite . 20 Stephanite . 21 Pyrargyrite . 21 Tetrahedrite . 22 Geocronite . 22 Bournonite . • . 23 Berthierite . 23 Meneghlnite . 24 Boulangerite . 24 Jamesonite . 25 Zinkenite . • . 25 Diaphorite ........ .. ... ................... ........ , . 26 Andorite ......... : . 26 Oxides . 26 Senarmontite . 27 Valentinite . • . 27 Cervantite . 27 Stibiconite . 28 Antimonate . 28 Bindheimite 28 4 Table of Contents Page Origin of mineral veins and associated antimony minerals......... ... 29 A possible origin for some structures controlling and related to vein formation . 29 Origin and nature of the mineralizing fluid. 32 Crystallization of magma. 32 Nature of the hydrothermal solution fraction. 34 Factors causing the solutions to rise. 39 Factors controlling precipitation . 39 Order of precipitation . 42 Vein formation and mineral zoni.ng. 43 The classification of the hydrothermal ore deposits.... ........... 47 Oxidation of the antimony minerals. 55 Prospecting for stibnite. 57 Antimony occurrences investigated... ... ............ ..... ... .. 59 Chelan County . 59 Orphan Boy prospect............... .. .. ..... ........... 59 Peshastin mine . 62 Snook and Ellen prospects. ........................... .. 62 Ferry County . 66 Covada district . 66 General description . 66 Longstreet and Robert E. Lee mines. 68 Silver Leaf min e. 71 King County . 74 Gold Mountain prospect.. .. .. ..... ... .. ........... 74 Great Republic mine...... .. ..... .................... 75 Buena Vista and Miller River districts. 78 Cleopatra group . 79 Dawson prospect . 83 Bear Basin mine, Adit No. 3 . 84 Coney Basin mine.................. ..... .... .... .. 87 Kittitas County . 87 Denny prospect . 87 Lewis County . 91 Reeves prospect . 91 Okanogan County . 92 Carlquist prospect . 92 Lucky Knock mine ............... , . 92 Introduction and history . 92 Description of the Lucky Knock stibnite deposit. 96 Carlton-Gold Creek area . 104 General geology . 106 Conclusions . 107 Antimony Bell mine. 107 Antimony Queen mine . 109 Bales prospect . 122 Coyote prospect . 123 Jumbo prospect . 124 Stibnite prospect . 125 Table of Contents 5 Page Antimony occmrences investigated- Continued P end Oreille County . 126 Lena Belle prospect . ..
Load more

Recommended publications
  • Large-Scale Hydrothermal Zoning Reflectedin The
    Canadian Mineralogist Vol. 27, pp. 383-400 (1989) LARGE-SCALE HYDROTHERMAL ZONING REFLECTED IN THE TETRAHEDRITE-FREIBERGITE SOLID SOLUTION, KENO HILL Ag-Pb-Zn DISTRICT, YUKON J.V. GREGORY LYNCH* Department of Geology, The University of Alberta, Edmonton, Alberta T6G 2E3 ABSTRACT en argent se distinguent aussi par une augmentation dans Ie nombre de cations dans leur formule chimique. Le rap- The zoned Keno Hill vein system of central Yukon port Sb/ As demeure uniformement eleve. extends laterally from a Cretaceous plutonic-metamorphic center and surrounding quartz-feldspar veins, to (Traduit par la Redaction) carbonate-Ag-Pb-Zn deposits, and further to peripheral veins having epithermal characteristics. Seven distinct Mots-cles: zonation hydrothermale, nappe aquifere, tetra- mineralogical zones are recognized, and the entire sequence edrite, solution solide, plutonique, epithermal, altera- is continuous from east to west in a 4O-km belt. The fault- tion, district de Keno Hill, Yukon. and fracture-controlled veins are stratabound to the brit- tle moderately dipping Keno Hill Quartzite unit, of Mis- INTRODUCTION sissippian age. The unit is graphitic and appears to have acted as a large-scale hydrothermal aquifer, restricting fluid This paper concerns the large-scale nature of the flow during minera1ization and" development of zoning predominantly to the lateral direction. Tetrahedrite is dis- Keno Hill hydrothermal system. A broad and con- tributed along a 25-km-Iong portion of the system, and is tinuous sequence of mineral zoning can be the principal ore mineral of Ag. Both Ag/Cu and Fe/Zn documented within veins distributed along an exten- values in tetrahedrite are highest at the outer extremity of sive portion of the Keno Hill Quartzite, which is the the system, where freibergite dominates over tetrahedrite; main host rock to the ore in the area.
    [Show full text]
  • Mineralization at Le Pulec, Jersey, Channel Islands; No. 1 Lode
    134 SHORT COMMUNICATIONS REFERENCES McKay, W. J. (1975) Woodlawn copper-lead-zinc orebody. Ibid. 701-10. Davis, L. W. (1975) Captains Flat lead-zinc orebody. In Knight, C. L. (ed.). Economic Geology of Australia and Papua New Guinea I. Metals. Melbourne, Australasian [Revised manuscript received 2 June 1981] Institute of Mining and Metallurgy, 691-700. Malone, E. J., Olgers, F., Cucchi, F. G., Nicholas, T., and t~) Copyright the Mineralogical Society Dept. of Geology, University of Wollonoong, New South Wales, Australia F. IVOR ROBERTS [Present address: School of Applied Geology, University of New South Wales, PO Box 1, Kensinoton , NSW 2033, Australia] MINERALOGICAL MAGAZINE, MARCH 1982, VOL. 46, PP. 134-6 Mineralization at Le Pulec, Jersey, Channel Islands; No. 1 Lode THE No. 1 Lode is the westernmost and most Mineralization within the Brioverian sediments extensive of three lead-zinc veins cutting Brioverian sediments at Le Pulec. It was described by Williams Anatase is common within the sediments as 2-10 (1871) as being between 1.5 and 1.8 m in width and pm anhedral grains associated with silicates or 183 m in length, with a trend of 340 ~ and the as 10 x 2 #m laths, parallel to the basal cleavage galena was reported to have a high silver content. of the altered phyllosilicates, particularly musco- Since the investigation of the No. 3 Lode (Ixer and vite. Anatase is also found with hematite laths Stanley, 1980) it has been possible to examine (20x 2 /~m) included in early pyrite grains. A several specimens, collected from the recently re- coarse-grained (600 x 20 pm) generation of anatase discovered No.
    [Show full text]
  • The Nature of Waste Associated with Closed Mines in England and Wales
    The nature of waste associated with closed mines in England and Wales Minerals & Waste Programme Open Report OR/10/14 BRITISH GEOLOGICAL SURVEY MINERALS & WASTE PROGRAMME OPEN REPORT OR/10/14 The National Grid and other Ordnance Survey data are used with the permission of the The nature of waste associated Controller of Her Majesty’s Stationery Office. OS Topography © Crown with closed mines in England and Copyright. All rights reserved. BGS 100017897/2010 Wales Keywords Abandoned mine waste facilities; Palumbo-Roe, B and Colman, T England and Wales; mineral deposits; environmental impact; Contributor/editor European Mine Waste Directive. Cameron, D G, Linley, K and Gunn, A G Front cover Graiggoch Mine (SN 7040 7410), Ceredigion, Wales. Bibliographical reference Palumbo-Roe, B and Colman, T with contributions from Cameron, D G, Linley, K and Gunn, A G. 2010. The nature of waste associated with closed mines in England and Wales. British Geological Survey Open Report, OR/10/14. 98pp. Copyright in materials derived from the British Geological Survey’s work is owned by the Natural Environment Research Council (NERC) and the Environment Agency that commissioned the work. You may not copy or adapt this publication without first obtaining permission. Contact the BGS Intellectual Property Rights Section, British Geological Survey, Keyworth, e-mail [email protected]. You may quote extracts of a reasonable length without prior permission, provided a full acknowledgement is given of the source of the extract. The views and statements expressed in this report are those of the authors alone and do not necessarily represent the views of the Environment Agency.
    [Show full text]
  • Washington State Minerals Checklist
    Division of Geology and Earth Resources MS 47007; Olympia, WA 98504-7007 Washington State 360-902-1450; 360-902-1785 fax E-mail: [email protected] Website: http://www.dnr.wa.gov/geology Minerals Checklist Note: Mineral names in parentheses are the preferred species names. Compiled by Raymond Lasmanis o Acanthite o Arsenopalladinite o Bustamite o Clinohumite o Enstatite o Harmotome o Actinolite o Arsenopyrite o Bytownite o Clinoptilolite o Epidesmine (Stilbite) o Hastingsite o Adularia o Arsenosulvanite (Plagioclase) o Clinozoisite o Epidote o Hausmannite (Orthoclase) o Arsenpolybasite o Cairngorm (Quartz) o Cobaltite o Epistilbite o Hedenbergite o Aegirine o Astrophyllite o Calamine o Cochromite o Epsomite o Hedleyite o Aenigmatite o Atacamite (Hemimorphite) o Coffinite o Erionite o Hematite o Aeschynite o Atokite o Calaverite o Columbite o Erythrite o Hemimorphite o Agardite-Y o Augite o Calciohilairite (Ferrocolumbite) o Euchroite o Hercynite o Agate (Quartz) o Aurostibite o Calcite, see also o Conichalcite o Euxenite o Hessite o Aguilarite o Austinite Manganocalcite o Connellite o Euxenite-Y o Heulandite o Aktashite o Onyx o Copiapite o o Autunite o Fairchildite Hexahydrite o Alabandite o Caledonite o Copper o o Awaruite o Famatinite Hibschite o Albite o Cancrinite o Copper-zinc o o Axinite group o Fayalite Hillebrandite o Algodonite o Carnelian (Quartz) o Coquandite o o Azurite o Feldspar group Hisingerite o Allanite o Cassiterite o Cordierite o o Barite o Ferberite Hongshiite o Allanite-Ce o Catapleiite o Corrensite o o Bastnäsite
    [Show full text]
  • 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]
  • Hip-Hop Education Center to Launch Campaign Asking President Obama
    For Immediate Release Press Contact: November 3, 2015 Lily Zaballos (510) 566-0814 [email protected] Hip-Hop Education Center to launch campaign asking President Obama to designate hip-hop as valuable public school education tool; hosts first annual awards for Hip-Hop Education pioneers NEW YORK — Today, the Hip-Hop Education Center (HHEC) announces that it will launch on November 11, 2015, the We The People for Hip-Hop Education in Public Schools, a petition requesting that the Obama Administration designate Hip-Hop culture as a valuable and uniquely American national treasure worthy of being taught and practiced in all K-12 public schools. “Carlos Mare and I are excited to share what we’ve been passionately working on for the past year, we know this will be game changer in education reform and will open up opportunities for millions of children.” said HHEC Founder Martha Diaz. For the past five years, HHEC has been conducting research, evaluating programs, and convening the teachers, teaching artists, scholars, researchers, activists, and music industry professionals to research and build a Hip-Hop Education movement. Research shows that Hip-Hop programing is making a difference with student engagement and academic outcomes. HHEC believes integrating Hip-Hop into public school education could help solve the U.S. education crisis: • Students are not being engaged in school. Approximately, 1.1 million American high school students drop out every year. That’s a student every 26 seconds – or 7,000 a day. • This education crisis poses direct negative consequences to poverty, crime, and economic conditions to our society.
    [Show full text]
  • The Daily Egyptian, November 21, 1996
    Southern Illinois University Carbondale OpenSIUC November 1996 Daily Egyptian 1996 11-21-1996 The Daily Egyptian, November 21, 1996 Daily Egyptian Staff Follow this and additional works at: https://opensiuc.lib.siu.edu/de_November1996 Volume 82, Issue 66 This Article is brought to you for free and open access by the Daily Egyptian 1996 at OpenSIUC. It has been accepted for inclusion in November 1996 by an authorized administrator of OpenSIUC. For more information, please contact [email protected]. .,Inside: Glyph inY,estiga~es Stµdem: Progra,mrping Council's :rble-.in campLis'entertainment Ii. November Thu rs~-. _YB_ ~-. _Daily gyptian . 1996 &:, iL Southern llhno1s University at Carbondale · : . ···· · ~-- · Vol. 82, No. 66, 12 pages H· I Prov:ost finalists vie for position during meeting ·By William Hatfield· "We have to ask;our.;clv1!$ what Daily Ei;yplian Reporter' we have lo offer lo freshmen:• Winters said. "We need lo explain the differ­ S1udcn1 Affairs anti Academic ences from our competitors 1ha1 Affairs should work 1ogc1hcr lo should make the Uni\·crsily anmc• solve University-wide problems. ti\·c lo undergraduates and their par• two canditlalc.s fo~ SIUC vice chan­ cnls." - ccl ltir of Academic ,\ffairs and Jackson agreed that Stutlenl provost said as they were inlcr­ Affairs and Academic Affairs need vicwcJ in an open meeting to work togc1hcr much more olicn. Wednesday · •·Mv views arc we have become Margaret E. Winlers. a.ssucialc much.to J1..-cornpa1tmen1alizl-tl. and I vice cham:ellor for- Academic think Student Affairs and Academic Affairs. anti John S. Jackson Ill. Affairs have pn:11y much gone their dean oflhe College of LihcrJI Ans.
    [Show full text]
  • Pyrostilpnite Ag3sbs3 C 2001-2005 Mineral Data Publishing, Version 1
    Pyrostilpnite Ag3SbS3 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic. Point Group: 2/m. Crystals tabular {010} giving flat rhombic forms; also laths by elongation k [001], to 1 mm; as subparallel sheaflike aggregates. Twinning: On {100} with (100) as composition plane. Physical Properties: Fracture: Conchoidal. Tenacity: Somewhat flexible in thin plates. Hardness = 2 VHN = 95–115, 107 average (100 g load). D(meas.) = 5.94 D(calc.) = 5.97 Optical Properties: Transparent. Color: Hyacinth-red; lemon-yellow by transmitted light. Streak: Yellow-orange. Luster: Adamantine. Optical Class: Biaxial (+). Orientation: Y = b; X ∧ c = 8–11◦. α = Very high. β = Very high. γ = Very high. R1–R2: (400) 36.3–36.9, (420) 36.3–36.5, (440) 36.1–35.8, (460) 35.7–35.1, (480) 34.9–34.2, (500) 33.9–33.2, (520) 32.3–31.8, (540) 30.8–30.3, (560) 29.6–29.2, (580) 28.6–28.2, (600) 27.8–27.5, (620) 27.1–26.7, (640) 26.6–26.2, (660) 26.2–25.8, (680) 25.9–25.4, (700) 25.6–25.2 ◦ 0 Cell Data: Space Group: P 21/c. a = 6.84 b = 15.84 c = 6.24 β = 117 09 Z=4 X-ray Powder Pattern: Pˇr´ıbram, Czech Republic. 2.85 (100), 2.65 (50), 2.42 (50), 1.895 (50b), 1.887 (50b), 1.824 (20b), 1.813 (20b) Chemistry: (1) (2) (3) Ag 59.44 59.7 59.76 Sb 22.30 23.7 22.48 S 18.11 16.8 17.76 Total 99.85 100.2 100.00 (1) St.
    [Show full text]
  • The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn
    minerals Article The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn-Porphyry Mineralization in the Kamariza Mining District, Lavrion, Greece † Panagiotis Voudouris 1,* , Constantinos Mavrogonatos 1 , Branko Rieck 2, Uwe Kolitsch 2,3, Paul G. Spry 4 , Christophe Scheffer 5, Alexandre Tarantola 6 , Olivier Vanderhaeghe 7, Emmanouil Galanos 1, Vasilios Melfos 8 , Stefanos Zaimis 9, Konstantinos Soukis 1 and Adonis Photiades 10 1 Department of Geology & Geoenvironment, National and Kapodistrian University of Athens, 15784 Athens, Greece; [email protected] (C.M.); [email protected] (E.G.); [email protected] (K.S.) 2 Institut für Mineralogie und Kristallographie, Universität Wien, 1090 Wien, Austria; [email protected] 3 Mineralogisch-Petrographische Abteilung, Naturhistorisches Museum, 1010 Wien, Austria; [email protected] 4 Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA 50011, USA; [email protected] 5 Département de Géologie et de Génie Géologique, Université Laval, Québec, QC G1V 0A6, Canada; [email protected] 6 Université de Lorraine, CNRS, GeoRessources UMR 7359, Faculté des Sciences et Technologies, F-54506 Vandoeuvre-lès-Nancy, France; [email protected] 7 Université de Toulouse, Géosciences Environnement Toulouse (GET), UMR 5563 CNRS, F-31400 Toulouse, France; [email protected] 8 Department of Mineralogy-Petrology-Economic Geology, Faculty of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] 9 Institut für Mineralogie, TU Bergakademie Freiberg, 09599 Freiberg, Germany; [email protected] 10 Institute of Geology and Mineral Exploration (I.G.M.E.), 13677 Acharnae, Greece; [email protected] * Correspondence: [email protected]; Tel.: +30-210-7274129 † The paper is an extended version of our paper published in 1st International Electronic Conference on Mineral Science.
    [Show full text]
  • Silver Enrichment in the San Juan Mountains, Colorado
    SILVER ENRICHMENT IN THE SAN JUAN MOUNTAINS, COLORADO. By EDSON S. BASTIN. INTRODUCTION. The following report forms part of a topical study of the enrich­ ment of silver ores begun by the writer under the auspices of the United States Geological Survey in 1913. Two reports embodying the results obtained at Tonopah, Nev.,1 and at the Comstock lode, Virginia City, Nev.,2 have previously been published. It was recognized in advance that a topical study carried on by a single investigator in many districts must of necessity be less com­ prehensive than the results gleaned more slowly by many investi­ gators in the course of regional surveys of the usual types; on the other hand the advances made in the study of a particular topic in one district would aid in the study of the same topic in the next. In particular it was desired to apply methods of microscopic study of polished specimens to the ores of many camps that had been rich silver producers but had not been studied geologically since such methods of study were perfected. If the results here reported appear to be fragmentary and to lack completeness according to the standards of a regional report, it must be remembered that for each district only such information could be used as was readily obtainable in the course of a very brief field visit. The results in so far as they show a primary origin for the silver minerals in many ores appear amply to justify the work in the encouragement which they offer to deep mining, irrespective of more purely scientific results.
    [Show full text]
  • Epithermal Bicolor Black and White Calcite Spheres from Herja Ore Deposit, Baia Mare Neogene Ore District, Romania-Genetic Considerations
    minerals Review Epithermal Bicolor Black and White Calcite Spheres from Herja Ore Deposit, Baia Mare Neogene Ore District, Romania-Genetic Considerations 1 1, 2 3 4,5 Ioan Mârza ,Călin Gabriel Tămas, * , Romulus Tetean , Alina Andreica , Ioan Denut, and Réka Kovács 1,4 1 Babe¸s-BolyaiUniversity, Faculty of Biology and Geology, Department of Geology, 1, M. Kogălniceanu str., Cluj-Napoca 400084, Romania; [email protected] (I.M.); [email protected] (R.K.) 2 Babe¸s-BolyaiUniversity, Faculty of Physics, 1, M. Kogălniceanu str., Cluj-Napoca 400084, Romania; [email protected] 3 Babe¸s-BolyaiUniversity, Faculty of European Studies, 1, Em. de Martonne, Cluj-Napoca 400090, Romania; [email protected] 4 County Museum of Mineralogy, Bulevardul Traian nr. 8, Baia Mare 430212, Romania; [email protected] 5 Technical University of Cluj-Napoca, North University Centre of Baia Mare, 62A, Dr. Victor Babes, str., Baia Mare 430083, Romania * Correspondence: [email protected] or [email protected]; Tel.: +40-264-405-300 (ext. 5216) Received: 24 April 2019; Accepted: 5 June 2019; Published: 8 June 2019 Abstract: White, black, or white and black calcite spheres were discovered during the 20th century within geodes from several Pb-Zn Au-Ag epithermal vein deposits from the Baia Mare ore district, ± Eastern Carpathians, Romania, with the Herja ore deposit being the maiden occurrence. The black or black and white calcite spheres are systematically accompanied by needle-like sulfosalts which are known by the local miners as “plumosite”. The genesis of epithermal spheres composed partly or entirely of black calcite is considered to be related to the deposition of calcite within voids filled by hydrothermal fluids that contain acicular crystals of sulfosalts, mostly jamesonite in suspension.
    [Show full text]
  • Clinocervantite, ~-Sb204, the Natural Monoclinic Polymorph of Cervantite from the Cetine Mine, Siena, Italy
    Eur. J. Mineral. 1999,11,95-100 Clinocervantite, ~-Sb204, the natural monoclinic polymorph of cervantite from the Cetine mine, Siena, Italy RICCARDO BASSO 1, GABRIELLA LUCCHETTI I, LIVIa ZEFIRO 1 and ANDREA PALENZONA 2 IDipartimento di Scienze delia Terra dell'Universita, Corso Europa 26, 1-]6] 32 Genova, Ita]y e-mail: minera]@dister.unige.it 2Dipartimento di Chi mica e Chimica industria]e dell'Universita, Via Dodecaneso 3],1-]6]46 Genova, Ita]y Abstract: Clinocervantite occurs at the Cetine di Cotorniano mine associated with valentinite, tripuhyite, bindheimite and rosiaite. Clinocervantite, appearing generally as aggregates of single prisms elongated along [001] or twinned on {100}, is co]ourless, transparent, with vitreous lustre, biaxial, with the lowest measured ] ] refractive index a,' = .72 and the highest one y' = 2. O. The strongest lines in the powder pattern are dill = 3.244 A and d311 = 2.877 A. The crystal structure, space group C2Ie with a = 12.061(1) A, b = 4.836(1) A, ] e = 5.383( I) A, ~= 04.60( 4)" and Z = 4, has been refined to R = 0.020, confirming the new mineral to be the natural analogue of the synthetic ~-Sb204 already known. The structures of clinocervantite and cervantite may be regarded as built up by stacking layers of nearly identical structure and composition accounting for both polytypism in the Sb204 compound and twinning of the clinocervantite crystals. Key-words: clinocervantite, crystal-structure refinement, cervantite, twinning. Introduction Occurrence, physical properties and chemical composition During the study of rosiaite (Basso et al., 1996), an associated new mineral was found in materia] Clinocervantite occurs in litt]e cavities of a rock from the Cetine mine, central Tuscany, Italy.
    [Show full text]