DOCSLIB.ORG

The Structure and Physicochemical Characteristics of Synthetic Zippeite

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Structure and Physicochemical Characteristics of Synthetic Zippeite 1091 The Cawdint Mincralogist Vol.33,pp. l09l-1101 (1995) THESTRUCTURE AND PHYSICOCHEMICALCHARACTERISTICS OF SYNTHETICZIPPEITE RENAIJD VOCI{TEN" LAURENT VAN HAVERBEKEAUP KAREL VAN SPRINGEL DepanemzntSch.eihmdz - Experimentele Mincralogie, Universiteit Atrh'verpen (RUCA), Middelheim.lannI, 8-2020 Anatterpen" Belgiwn NORBERT BLATON AND OSWALD M. PEETERS Laboratoriwn voor analytischechemie en nedicinalefysicochemie, Fatalteit FarmareutischeWetenschappeg KathotiekeIJniversiteit Izaveu Van Evenstrant4, 8'3000 leweu Belgiwn ABSTRACT Zppeite was synthezisedby adjustinga UO2SOasolution containingK2SO4to a pH of 3.6 by meansof KOH and keeping it for ?5 hours at 150'C and an approrinat" p"ir*i of 3.5 MPa. The crystalsare yellow and well-formed. Chemicalanalysis rtves K(UO),(SO,(OFD1.H2O; th" *-poiitioo. The strongestlinesof the X-ray pattemconespond to lvalues of 7.06;3.51, i:q, Z.;ae,[ia Z.dS A. in" putt rn is identical to the pattem of natural zippeite. Single-crystalX-ray studiesrevealed the composition K(1O;2SO4(OFU.HrO. The crystals are monoclinic, space group A/c, with a 8.755(3), b 13.987Q\, c t7 J30e) A,p f O+.titlj", andZl 8. ttt" d"nriryDnis 4.8, andD*is 4.7 glcm3.The crystalstructure was solved by Patterson (010). methods.The slucture hasbeen refined to anutrwiigftd residualofb.053. Zppeite possessesa layer structurepaxalld to UO4(OIO3pentagonal bipyramids are the building blocks of a unique pattern of double polyhedrafinked along_theaaxis by edgi*hariirg of OH-groups.The UOo(OlI)3 chainsare joined by chainsof SOapolyhedra into infinite (UO)2(OII)2SOasheets. o yo 3/t, Tllre crystals show a rwo cuojrtomrsoa sheets sandwich planm layers of K+, olf, and Hro il y arrd moderatefr,ioto.6or" U"t*oit 520 and 610 nn" with unresolvedbands at room temlrerafi[e, but with three distinct bandsat j7 K T\e infrared spectrumwas recdrde4 and the most important bands were assigned..Theoptical parameterswere determined.The crystalshave a moderate'solubility,with the solubility product found to be 1032'0. Kelwords: zippeite,synthesis, srystal structure,physicochemical properties. Solrtnaanr Nous avons€ussi i synth6tiserla zipfite en ajustantle pH d'une solution UO2SO4contenant &SO4 A 3.6 en y ajoutant KOH et en la laissantpour75 heuresi 15b;C et envhon3.5 MPa. Les cristauxsonljaunes et bien form6s.Une analysechimique a donn6K(UO)r(SO,(OrD3.H2O. ks raies les plus intensesdu specfiede ditraction sont situ6si une valeur d de 7 .06,3.51, 3.14, 2.86 et Z]ASA.-Ce.p""6 identique i celui de la zip$ite natmelle. Des dtudessur cristal unique par ditfraction X confirment la composition,et montrent"rt qui b appeit" est monoctinique,groupo spanalC2Jc, avec a 8.755Q), b 13.987Q), gc#. r6solula ti.iZOtl) A, p f O+.f:tf l;, Z = 8. La densiGmesur6e D, est 4.8, et la densit6calcul6e D, est 4.7 N-ousavons "stucfure par -eOoO"s de Pattenon jusqud un rdsidu R de 0.053. la zippdite est faite de couchesparallbles i (010). Des pentagonesbipyramidaux UO4(OI03 soil I'unit6 structuralede based'un agencementunique de poly!.dresdoubles align6s le ioog i" t'axe o par partageda$tes iipliquant des groupesOH, ks cha?nesUOa(OH)3 sont li6es par deschatnes de polybdres SOipour forrner dis feriillets de stoechiomdtrie(UOr2(OII)2SO4. Entre deux de ces feuillets se trouvent des couchesde K*' OFi et tt O a une 6l6vationy d'envfuonYEete/q.I** sristauxmontrent une fluorescencemoyenie entre520 et620 r.m"avec des bandesn6n r6soluese bmperature amblante,et trois bandesdistinctes e 77 K. NoUs avons mesur6et interpldtd le spectre infrarouge,et nous avonsaet"rnioe les propri6t6soptiques. Irs cristaux sont mod6r6mentsolubles, et le produit de solubilit6 est 10142'@' (fraduitparlaR6daetion) Mots-cles: dppeite,synthbse,structure cristalline, propri6t6s physicochimiques. 1092 TTIE CANADIAN MINERALOGIST INTRoDUCttoN further characterizedby its ffiared and luminescence spectr4 its solubility product,and optical paramelers. Zppeite is a secondaryuranium-bearing minslal belonging to the group of basic uranyl sulfates.This SnsmEsts minsral is ofrecent fonnation and occursas a vellow earthy efflorescenceand glassy crust on the walls of In order to synthesize a sufficient quantity of mins v/6pffigs containing uraninite. The mineral has zippeite,several experiments were necessary. A 50 mL a hardnessof about 2 and is easily soluble in acids. solutionof 0.075M UO2SO4was mixed with 1.5g of Its formation results from the oxidation reaction of K2SO.and adjusted to a pH of 3.6 by meansof KOH. uraninite in a H2SO^medium, which in turn is forrned This solution was introduced into a 170 mL teflon- by the oxidationof metal sulfidesin a relativelv humid lined bomb, resulting n a 30Vo degree of filling. atmosphere. The bomb was heatedfor 75 hours at 150'C. which T,rppateis most commonlyassociated with gypsum resultedin an approximatepressure of 3.5 MPa. The and uranopilite [(UOr)6(SOt(OH)r0.12H2O],and crystals obtained were washed several times with less, commonly with johannite [Cu(UOr)r(SOr), distilled water and subsequentlyair-dried. They were (-O.pz.SttzOJand uranophane [Ca(H3O)2\!UO); large enoughand sufficiently well-formed for a single- (SiOr2l.3H2Ol. Numerouslocalities are describedin crystal study. A scanningelectron micrograph (Ftg. 1) the literature (Frondel 1958).There is someconfusion showsthat the crystalsare monoclinic, with a plate-like concerning its composition, structure, and related habit and truncatededges. The height of the crystals properties.Nov6cek (1935) describedthe mineral as rangesfrom 0.1 to 0.25 mm, andthe width rangesfrom 2UO3.SOr.zH2O,v/ith n being 5 or 6, whereasHess 0.05 to 0.1 mm. The SEM photographin Figure I (1924)proposed the formula 2UOr.SOr.3HrO.Traill shows that the morphology of the crystals can be (1952) describeda syntheticzippeite phaseas a basic consideredas a combinationof the forms {101} and uranyl sulfate (UO)2SO4(OI!2.4H2O, and Frondel {010} andtwo domes. (1958) proposedthe formula 2UOr.SOr.5HrO.More recenfly, Frondel et al. (1976) found, on the basis of Cns&trcAr,ColposrnoN accuratechemical analytical datA that the structure of zippeite contains potassium, and proposed that The air-dried syntheticcompound was dissolvedin zippeite is a K-bearing basic uranyl sulfate with the 6 M HCl. The KrO content of the resulting solution formula&(UOr6(SOr3(OII)10.4H2O. was determinedby atomic absorption spectrophoto- As natural zippeite is not suitablefor single-crystal metry using a Philips Pye Unicam model PU 9200 studies, the aim of our researchwas to synthesize atomicabsorption spectrophotometer. The UO, content zippeiteunder moderate pressure and temperature,and was also determinedspectrophotometically by means to use the resulting well-formed crystals for a of a Pye Unicam SP8-100 ultraviolet spectrophoto- determinationof its structme.This syntheticzippeite is meter using arsenazoItr as the reagent, the optical Ftc. 1. Scanning elecffon micrograph of the syn- thetic crystals. The size bar is divided into 10 pm units. TTIE STRUCTUREOF ZPPEITE 1093 TABLE I. CHEMICAL COMPOSIION OF SYNTTIETICZPPEITE From the TG curves,a total loss of.6.L7VoH2O was deduced.In the range 30o - 150oC, 1.97 molecules Oxide wa$tt% Atomic qwtiti* (x l0') Alomic rdo of H2O were losl whereasbetween 150oand 450'C, 0.41 moleculesof water were lost. The total numberof K,O 7.56 802.5 l.r3 uo, 75.90 2653 1.88 water moleculeslost over the whole rangeis therefore so, 10.63 1327 O.94 2.38. The loss of SO3 takes place in the region HrO 6.t7 6500- 900'c. Total 100.51 Kr rr(UOJr ss(SO4)os(OI03.0.88HrO X-nav Powpm.-Dnrn-q.cnoNDere X-ray powder-diffraction data were recorded at 40 kV alLd 20 mA using CuKcrl radiation (1, = 1.5406A) and a Guinier-Hdgg camerawith a diameter density-being measuredat 662.5 nm (Singer & of 100 mm. Silicon powder (NBS-640) was used as a Matucha 1962). The SO1 conlent was determined calibration standard.The relative intensities of the gravimenically as BaSOr-. The water content was diffraction lines were measuredwith a Carl Zeiss Jena determinedby thermogravimetricanalysis, which will MD-100 microdensitometer.The results are given in be discussedseparately. Table I summarizesthe results Table2. The X-ray patternof the syntheticmaterial is of the chemical analysis and the computed atomic identical with the data given by Traill (1952) (JCPDS ratios. 8-138) and Frondel(1958) (JCPDS 29-1062), so the From the oxide composition,the chemical formula compoundcan be idenffied definitively as synthetic was calculatedby the classicalresidual oxygen method zippeite. based on 11 atoms of oxygen, the result being: K1.13(UOr1.88(SOrg.e4(OHL'0.88H2Oor, ideally, Srnucnins DE"rERvm.{ATroN KCJO)2SO4(OI{)3.H2O.The crystal-structureanalysis showedthatz=8. Many crystals are twinned. Crystals suitable for The thermal stability of the synthetic crystals was diffraction work were soughtby microscopicexamina- investigatedby thermogravimetry(IG) combinedwith tion underpolarizedlight. Only crystalsthat extinguish differential seanning calorimetry (DSC). A Dupont were selected.Crystal quality was further DSC 910 and TGA 951 apparatuswas used with assessedby noting the quality of X-ray-diffraction an applied heating rate of 5'CYmin and a N2 flow of spots on WeissenbergfiIms. Appropriate peak-shape 30 ml-/min. The TG curve and its derivative are and width on diffractogramsrevealed that the selected representedin Figures2A and 28, respectively. crystals are untwinned and have good crystallinity. Weissenberg photographs showed a monoclinic C-centeredlattice (systematicabsences for h + k = 2n + | for all reflections, and I = 2n + L for hOl reflections). An orthorhombic pseudocell with the same dimensionsas the unit cell was describedby Frondel et al. (1976),but the very weak supersfructure diffraction-maxima (requiring doubling of the ortho- rhombic b-axis) could not be detectedeither with an overexposed(200 h) Weissenbergphotograph or with a four-circle ditractometer. An orthorhombic space- group that fit$ the observedintensities could not be found. A transparent, yellow, plate-like crystal was mounted on a single-crystaldiffractometer.
Load more

Recommended publications
  • Significance of Mineralogy in the Development of Flowsheets for Processing Uranium Ores
    JfipwK LEACHING TIME REAGENTS TEMPERATURE FLOCCULANT CLARITY AREA COUNTER CURRENT DECANTATION It 21 21 J^^LJt TECHNICAL REPORTS SERIES No.19 6 Significance of Mineralogy in the Development of Flowsheets for Processing Uranium Ores \W# INTERNATIONAL ATOMIC ENERGY AGENCY, VIENNA, 1980 SIGNIFICANCE OF MINERALOGY IN THE DEVELOPMENT OF FLOWSHEETS FOR PROCESSING URANIUM ORES The following States are Members of the International Atomic Energy Agency: AFGHANISTAN HOLY SEE PHILIPPINES ALBANIA HUNGARY POLAND ALGERIA ICELAND PORTUGAL ARGENTINA INDIA QATAR AUSTRALIA INDONESIA ROMANIA AUSTRIA IRAN SAUDI ARABIA BANGLADESH IRAQ SENEGAL BELGIUM IRELAND SIERRA LEONE BOLIVIA ISRAEL SINGAPORE BRAZIL ITALY SOUTH AFRICA BULGARIA IVORY COAST SPAIN BURMA JAMAICA SRI LANKA BYELORUSSIAN SOVIET JAPAN SUDAN SOCIALIST REPUBLIC JORDAN SWEDEN CANADA KENYA SWITZERLAND CHILE KOREA, REPUBLIC OF SYRIAN ARAB REPUBLIC COLOMBIA KUWAIT THAILAND COSTA RICA LEBANON TUNISIA CUBA LIBERIA TURKEY CYPRUS LIBYAN ARAB JAMAHIRIYA UGANDA CZECHOSLOVAKIA LIECHTENSTEIN UKRAINIAN SOVIET SOCIALIST DEMOCRATIC KAMPUCHEA LUXEMBOURG REPUBLIC DEMOCRATIC PEOPLE'S MADAGASCAR UNION OF SOVIET SOCIALIST REPUBLIC OF KOREA MALAYSIA REPUBLICS DENMARK MALI UNITED ARAB EMIRATES DOMINICAN REPUBLIC MAURITIUS UNITED KINGDOM OF GREAT ECUADOR MEXICO BRITAIN AND NORTHERN EGYPT MONACO IRELAND EL SALVADOR MONGOLIA UNITED REPUBLIC OF ETHIOPIA MOROCCO CAMEROON FINLAND NETHERLANDS UNITED REPUBLIC OF FRANCE NEW ZEALAND TANZANIA GABON NICARAGUA UNITED STATES OF AMERICA GERMAN DEMOCRATIC REPUBLIC NIGER URUGUAY GERMANY, FEDERAL REPUBLIC OF NIGERIA VENEZUELA GHANA NORWAY VIET NAM GREECE PAKISTAN YUGOSLAVIA GUATEMALA PANAMA ZAIRE HAITI PARAGUAY ZAMBIA PERU The Agency's Statute was approved on 23 October 1956 by the Conference on the Statute of the IAEA held at United Nations Headquarters, New York; it entered into force on 29 July 1957.
    [Show full text]
  • Uraninite Alteration in an Oxidizing Environment and Its Relevance to the Disposal of Spent Nuclear Fuel
    TECHNICAL REPORT 91-15 Uraninite alteration in an oxidizing environment and its relevance to the disposal of spent nuclear fuel Robert Finch, Rodney Ewing Department of Geology, University of New Mexico December 1990 SVENSK KÄRNBRÄNSLEHANTERING AB SWEDISH NUCLEAR FUEL AND WASTE MANAGEMENT CO BOX 5864 S-102 48 STOCKHOLM TEL 08-665 28 00 TELEX 13108 SKB S TELEFAX 08-661 57 19 original contains color illustrations URANINITE ALTERATION IN AN OXIDIZING ENVIRONMENT AND ITS RELEVANCE TO THE DISPOSAL OF SPENT NUCLEAR FUEL Robert Finch, Rodney Ewing Department of Geology, University of New Mexico December 1990 This report concerns a study which was conducted for SKB. The conclusions and viewpoints presented in the report are those of the author (s) and do not necessarily coincide with those of the client. Information on SKB technical reports from 1977-1978 (TR 121), 1979 (TR 79-28), 1980 (TR 80-26), 1981 (TR 81-17), 1982 (TR 82-28), 1983 (TR 83-77), 1984 (TR 85-01), 1985 (TR 85-20), 1986 (TR 86-31), 1987 (TR 87-33), 1988 (TR 88-32) and 1989 (TR 89-40) is available through SKB. URANINITE ALTERATION IN AN OXIDIZING ENVIRONMENT AND ITS RELEVANCE TO THE DISPOSAL OF SPENT NUCLEAR FUEL Robert Finch Rodney Ewing Department of Geology University of New Mexico Submitted to Svensk Kämbränslehantering AB (SKB) December 21,1990 ABSTRACT Uraninite is a natural analogue for spent nuclear fuel because of similarities in structure (both are fluorite structure types) and chemistry (both are nominally UOJ. Effective assessment of the long-term behavior of spent fuel in a geologic repository requires a knowledge of the corrosion products produced in that environment.
    [Show full text]
  • Seznam Publikací Wos Q1 a Q2
    Přehled publikací pracovníků/studentů ÚGV PřF MU Brno v časopisech 1./2. kvartilu v období 2003-2021 2021 (celkem 22 článků, 7 studentů spoluautorů – červeně) Adameková, K., Lisá, L., Neruda, P., Petřík, J., Doláková, N., Novák, J., Volánek, J. (2021): Pedosedimentary record of MIS 5 as an interplay of climatic trends and local conditions: Multi-proxy evidence from the Palaeolithic site of Moravský Krumlov IV (Moravia, Czech Republic). Catena, 200, 105174. doi: 10.1016/j.catena.2021.105174 WoS: IF2020: 5,198; Q1 (12/98) in Water Resources; Q1 (7/37) in Soil Science; Q1 (22/199) in Geosciences, Multidisciplinary; počet citací: 1 Bábek, O., Kumpan, T., Calner, M., Šimíček, D., Frýda, J., Holá, M., Ackerman, L., Kolková, K. (2021): Redox geochemistry of the red „orthoceratite limestone“ of Baltoscandia: Possible linkage to mid-ordoviian palaeoceanographic changes. Sedimentary Geology, 420, 105934. doi: 10.1016/j.sedgeo.2021.105934 WoS: IF2020: 3,397; Q1 (7/48) in Geology; počet citací: 0 Bonilla-Salomón, I., Čermák, S., Luján, Á.H., Horáček, I., Ivanov, M., Sabol, M. (2021): Early Miocene small mammals from MWQ1/2001 Turtle Joint (Mokrá-Quarry, South Moravia, Czech Republic): biostratigraphical and palaeoecological considerations. Bulletin of Geosciences, 96, 1, 99–122. WoS: IF2020: 1,600; Q2 (27/57) in Paleontology; Q4 (157/199) in Geosciences, Multidisciplinary; počet citací: 0 Březina, J., Alba, D.M., Ivanov, M., Hanáček, M., Luján, Á.H. (2021): A middle Miocene vertebrate assemblage from the Czech part of the Vienna Basin: Implications for the paleoenvironments of the Central Paratethys. Palaeogeography, Palaeoclimatology, Palaeoecology, 575, 110473. WoS: IF2020: 3,318; Q2 (21/50) in Geography, Physical; Q1 (2/54) in Paleontology; Q2 (74/199) in Geosciences, Multidisciplinary; počet citací: 0 Čopjaková, R., Prokop, J., Novák, M., Losos, Z., Gadas, P., Škoda, R., Holá, M.
    [Show full text]
  • Mineral Collecting Sites in North Carolina by W
    .'.' .., Mineral Collecting Sites in North Carolina By W. F. Wilson and B. J. McKenzie RUTILE GUMMITE IN GARNET RUBY CORUNDUM GOLD TORBERNITE GARNET IN MICA ANATASE RUTILE AJTUNITE AND TORBERNITE THULITE AND PYRITE MONAZITE EMERALD CUPRITE SMOKY QUARTZ ZIRCON TORBERNITE ~/ UBRAR'l USE ONLV ,~O NOT REMOVE. fROM LIBRARY N. C. GEOLOGICAL SUHVEY Information Circular 24 Mineral Collecting Sites in North Carolina By W. F. Wilson and B. J. McKenzie Raleigh 1978 Second Printing 1980. Additional copies of this publication may be obtained from: North CarOlina Department of Natural Resources and Community Development Geological Survey Section P. O. Box 27687 ~ Raleigh. N. C. 27611 1823 --~- GEOLOGICAL SURVEY SECTION The Geological Survey Section shall, by law"...make such exami­ nation, survey, and mapping of the geology, mineralogy, and topo­ graphy of the state, including their industrial and economic utilization as it may consider necessary." In carrying out its duties under this law, the section promotes the wise conservation and use of mineral resources by industry, commerce, agriculture, and other governmental agencies for the general welfare of the citizens of North Carolina. The Section conducts a number of basic and applied research projects in environmental resource planning, mineral resource explora­ tion, mineral statistics, and systematic geologic mapping. Services constitute a major portion ofthe Sections's activities and include identi­ fying rock and mineral samples submitted by the citizens of the state and providing consulting services and specially prepared reports to other agencies that require geological information. The Geological Survey Section publishes results of research in a series of Bulletins, Economic Papers, Information Circulars, Educa­ tional Series, Geologic Maps, and Special Publications.
    [Show full text]
  • ANL-EBS-GS-000002, Rev. 01, Addendum
    DOC.20071106.0015 QA: QA ANL-EBS-GS-000002 REV 01 September 2006 Geochemistry Model Validation Report: External Accumulation Model THIS DOCUMENT CONTAINS THE FOLLOWING, LOCATED AT THE BACK OF THE DOCUMENT: 1) ADDENDUM 001, DATED 11/01/2007 Prepared for: U.S. Department of Energy Office of Civilian Radioactive Waste Management Office of Repository Development 1551 Hillshire Drive Las Vegas, Nevada 89134-6321 Prepared by: Bechtel SAIC Company, LLC 1180 Town Center Drive Las Vegas, Nevada 89144 Under Contract Number DE-AC28-01RW12101 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or any third party’s use or the results of such use of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof or its contractors or subcontractors. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. ANL-EBS-GS-000002 REV 01 September 2006 QA: QA Geochemistry Model Validation Report: External Accumulation Model ANL-EBS-GS-000002 REV 01 September 2006 ANL-EBS-GS-000002 REV 01 September 2006 Model Signature Page/Change History Page iii SSC Complete only applicable items.
    [Show full text]
  • Glossary of Obsolete Mineral Names
    Uaranpecherz = uraninite, László 282 (1995). überbasisches Cuprinitrat = gerhardtite, Hintze I.3, 2741 (1916). überbrannter Amethyst = heated 560ºC red-brown Fe-rich quartz, László 11 (1995). Überschwefelblei = galena + anglesite + sulphur-α, Chudoba RI, 67 (1939); [I.3,3980]. uchucchacuaïte = uchucchacuaite, MR 39, 134 (2008). uddervallite = pseudorutile, Hey 88 (1963). uddevallite = pseudorutile, Dana 6th, 218 (1892). uddewallite = pseudorutile, Des Cloizeaux II, 224 (1893). udokanite = antlerite, AM 56, 2156 (1971); MM 43, 1055 (1980). uduminelite (questionable) = Ca-Al-P-O-H, AM 58, 806 (1973). Ueberschwefelblei = galena + anglesite + sulphur-α, Egleston 132 (1892). Uekfildit = wakefieldite-(Y), Chudoba EIV, 100 (1974). ufalit = upalite, László 280 (1995). uferite = davidite-(La), AM 42, 307 (1957). ufertite = davidite-(La), AM 49, 447 (1964); 50, 1142 (1965). U-free thorite = huttonite, Clark 303 (1993). U-galena = U-rich galena, AM 20, 443 (1935). ugandite = bismutotantalite, MM 22, 187 (1929). ughvarite = nontronite ± opal-C, MAC catalog 10 (1998). ugol = coal, Thrush 1179 (1968). ugrandite subgroup = uvarovite + grossular + andradite ± goldmanite ± katoite ± kimzeyite ± schorlomite, MM 21, 579 (1928). uhel = coal, Thrush 1179 (1968). Uhligit (Cornu) = colloidal variscite or wavellite, MM 18, 388 (1919). Uhligit (Hauser) = perovskite or zirkelite, CM 44, 1560 (2006). U-hyalite = U-rich opal, MA 15, 460 (1962). Uickenbergit = wickenburgite, Chudoba EIV, 100 (1974). uigite = thomsonite-Ca + gyrolite, MM 32, 340 (1959); AM 49, 223 (1964). Uillemseit = willemseite, Chudoba EIV, 100 (1974). uingvárite = green Ni-rich opal-CT, Bukanov 151 (2006). uintahite = hard bitumen, Dana 6th, 1020 (1892). uintaite = hard bitumen, Dana 6th, 1132 (1892). újjade = antigorite, László 117 (1995). újkrizotil = chrysotile-2Mcl + lizardite, Papp 37 (2004). új-zéalandijade = actinolite, László 117 (1995).
    [Show full text]
  • Celkový Seznam Publikací
    Přehled impaktovaných publikací učitelů/studentů ÚGV PřF MU v Brně v období 2003-2021 2021 (celkem 7 článků, 3 studenti spoluautoři – červeně) Frýbort, A., Štulířová, J., Zavřel, T., Gregerová, M., Všianský, D. (2021): Reactivity of slag in 15 years old self-compacting concrete. Construction and Building Materials, 267, 120914. doi: 10.1016/j.conbuildmat.2020.120914 WoS: Gadas, P., Novák, M., Vašinová Galiová, M., Szuszkiewicz, A., Pieczka, A., Haifler, J., Cempírek, J. (2021): Secondary Beryl in Cordierite/Sekaninaite Pseudomorphs from Granitic Pegmatites – A Monitor of Elevated Content of Beryllium in the Precursor. Canadian Mineralogist. In press. doi: 10.3749/canmin.2000014 WoS: Haifler, J., Škoda, R., Filip, J., Larsen, A.O., Rohlíček, J. (2021): Zirconolite from Larvik Plutonic Complex, Norway, its relationship to stefanweissite and nöggerathite, and contgribution to the improvement of zirconolite endmember systematice. American Mineralogist. In press. doi: 10.2138/am-2021-7510 WoS: Krmíček, L., Novák, M., Trumbull, R.B., Cempírek, J., Houzar, S. (2021): Boron isotopic variations in tourmaline from metacarbonattes and associated talc-silicate rocks from the Bohemian Massif: Constraints on boron recycling in the Variscan orogen. Geoscience Frontiers, 12, 1, 219–230. doi: 10.1016/j.gsf.2020.03.009 WoS: Krmíček, L., Ulrych, J., Jelínek, E., Skála, R., Krmíčková, S., Korbelová, Z., Balogh, K. (2021): Petrogenesis of Cenozoic high-Mg (picritic) volcanic rocks in the České středohoří Mts. (Bohemian Massif, Czech Republic). Mineralogy and Petrology. In press. doi: 10.1007/s00710-020-00729-5 WoS: Majzlan, J., Plášil, J., Dachs, E., Benisek, A., Mangold, S., Škoda, R., Abrosimova, N. (2021): Prediction and observation of formation of Ca–Mg arsenates in acidic and alkaline fluids: Thermodynamic properties and mineral assemblages at Jáchymov, Czech Republic and Rotgülden, Austria.
    [Show full text]
  • A New Member of the Zippeite Group Containing Trivalent Cations from Jáchymov (St
    American Mineralogist, Volume 96, pages 983–991, 2011 Sejkoraite-(Y), a new member of the zippeite group containing trivalent cations from Jáchymov (St. Joachimsthal), Czech Republic: Description and crystal structure refinement JAKUB PLÁšIL,1,2,* MICHAL DUšEK,3 MILAN NOVÁK,2 Jiří ČeJka,4 ivana Císařová,5 AND RADEK šKODA2 1Department of Mineralogy and Petrology, National Museum, Václavské náměstí 68, CZ-115 79, Prague 1, Czech Republic 2Department of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, CZ-611 37, Brno, Czech Republic 3Institute of Physics ASCR, v.v.i., Na Slovance 2, CZ-182 21 Prague, Czech Republic 4Natural History Museum, National Museum, Václavské náměstí 68, CZ-115 79, Prague 1, Czech Republic 5Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 6, CZ-128 43, Prague 2, Czech Republic abstraCt + Sejkoraite-(Y), the triclinic (Y1.98Dy0.24)Σ2.22H0.34[(UO2)8O88O7OH(SO4)4](OH)(H2O)26, is a new member of the zippeite group from the Červená vein, Jáchymov (Street Joachimsthal) ore district, Western Bohemia, Czech Republic. It grows on altered surface of relics of primary minerals: ura- ninite, chalcopyrite, and tennantite, and is associated with pseudojohannite, rabejacite, uranopilite, zippeite, and gypsum. Sejkoraite-(Y) forms crystalline aggregates consisting of yellow-orange to orange crystals, rarely up to 1 mm in diameter. The crystals have a strong vitreous luster and a pale yellow-to-yellow streak. The crystals are very brittle with perfect {100} cleavage and uneven fracture. The Mohs hardness is about 2. The mineral is not fluorescent either in short- or long-wavelength UV radiation.
    [Show full text]
  • Mineralogy of the Zippeite Group 433
    C anadian M ine raloei.st Vol. 14, W, 429436 (1976) MINERALOGYOF THEZIPPEITE GROUP CLIFFORD FRONDEL Department of Geological Sciences,Hamatd University, Cambidge, Massachusetts JUN ITO James Franck Instilute, University ol Chicago, Chlcago, Illinois RUSSELL M. HONEA 1105Bellatre Street,Broomtield, Colorado ALICE M. WEEKS Department of Geology, Temple University, Philadelphia, Pennsylvania ABsrRAcr en trois groupes, chimiquement et aux rayons-X, selon qu'ils contiennent: K ou NHa, Na, ou un The ill-defined mineral zippeite and a number cation divalent. De nombreuses solutions solides of zippeite-like minerals, hitherto supposed to be existent entre pOles i cations divalents, mais non hydrated uranyl sulfates, are found to contain one K et Na. Le compo# correspondant au p6le Na or another of various monovalent or divalent ca- est orthohombique avec a 8.80, b 68.48, c 14.55L; tions in addition to uranium. They correspond to tous ces min6raux possddent une m0_me pseudo- syntletic phases with the formula l"(UOr6(SOrg maille avec 4 -8.8. b -17.1, c -7.2L. (OH)ro.yHgO, where A is K, Na or NHa (with La nature chimique de la zippEite type de Joa- .r-4 and y-4) or Co,Ni,Fe2+,Mna+,Mgln (with chimsthal (J. F. John 1821) n'est pas connue. Un r=2 and y-16). All are structurally related but min6ral analogue, d6crit par R. Nov6dek (1935) et three subgroups are indicated by X-ray and ch€m- provenant de la m0me localit6, est identifi6 corrme ical evidencel the K and NHa members, the Na potassigueet est consid6r6 comme n6otype.
    [Show full text]
  • Identification and Occurrence of Uranium and Vanadium Minerals from the Colorado Plateaus
    Identification and Occurrence of Uranium and Vanadium Minerals From the Colorado Plateaus GEOLOGICAL SURVEY BULLETIN 1009-B IDENTIFICATION AND OCCURRENCE OF URANIUM AND VANADIUM MINERALS FROM THE COLORADO PLATEAUS By A. D. WEEKS and M. E. THOMPSON ABSTRACT This report, designed to make available to field geologists and others informa­ tion obtained in recent investigations by the Geological Survey on identification and occurrence of uranium minerals of the Colorado Plateaus, contains descrip­ tions of the physical properties, X-ray data, and in some instances results of chem­ ical and spectrographic analysis of 48 uranium and vanadium minerals. Also included is a list of locations of mines from which the minerals have been identified. INTRODUCTION AND ACKNOWLEDGMENTS The 48 uranium and vanadium minerals described in this report are those studied by the writers and their colleagues during recent mineralogic investigation of uranium ores from the Colorado Plateaus. This work is part of a program undertaken by the Geological Survey on behalf of the Division of Raw Materials of the U. S. Atomic Energy Commission. Thanks are due many members of the Geological Survey who have worked on one or more phases of the study, including chemical, spec­ trographic, and X-ray examination,' as well as collecting of samples. The names of these Survey members are given in the text where the contribution of each is noted. The writers are grateful to George Switzer of the U. S. National Museum and to Clifford Frondel of Harvard University who kindly lent type mineral specimens and dis­ cussed various problems. PURPOSE The purpose of this report is to make available to field geologists and others who do not have extensive laboratory facilities, information obtained in recent investigations by the Geological Survey on the identification and occurrence of the uranium and vanadium minerals of ores from the plateaus.
    [Show full text]
  • Download the Scanned
    Tsn AUERICAN MINERALocIST JOURNAL OF THE MINERALOGICAL SOCIETY OF AMERICA Vol.31 MARCH-APRIL, 1946 Nos. 3 and 4 THE LOCALIZATION OF URANIUM AND THORIUM MINERALS IN POLISHED SECTION PART 1: THE ALPHA RAY EMISSION PATTERN HonueN YeGooA,National Insl.itule oJ Health, I ndustrial Hy gieneReseor ch Laboratory, Bethesila,Marylond.. CoNrBnrs Introduction 88 Autoradiographic mechanism. 89 Properties of alpha particle emulsion. 93 Action of light... 94 Action of pseudophotographic agents 94 Effectof pressure.. .... 94 Chemical reactions with the emulsion. 95 Efiect of beta and gamma radiations. 95 Efiect of c-ray radiation. 96 Effect of neutron radiation. 96 Fading of the latent alpha ray image 96 Efiect of mercury vapor. 97 Efiect of temperature during exposure. 98 Preparation of the polished section. 99 The autoradiographic exposure. r01 Development of alpha particle emulsion t02 Resolving power of alpha ray pattern. t02 Classification oI uranium and thorium minerals. 106 fnterference caused by samarium. tr4 Summary. 115 Acknowledgments..... 116 AssrRAcr uranium and thorium minerals occurring in polished sections are characterized by means of a selective alpha ray emission pattern on light desensitized emulsions. The characteristics and special processing of the emulsion are described. Comparative studies reveal ]ack of sensitivity to beta and gamma radiations, visible and ultra violet light and chemical agents producing pseudophotographic efiects. The emulsion is only slightly sensi- tive to r-rays and neutron radiations. The emulsions exhibit a marked fading of the latent image on delayed development, and the latent image is destroyed by the presence of mer- cury vapor during the exposure. The medium produces a sharply defined, reproducible 87 88 HERMAN YAGODA image of alpha radiation originating from polished sections in direct contact with the emul- sion.
    [Show full text]
  • Contribution to the Mineralogy of Acid Drainage of Uranium Minerals: Marecottite and the Zippeite-Group
    American Mineralogist, Volume 88, pages 676–685, 2003 Contribution to the mineralogy of acid drainage of Uranium minerals: Marecottite and the zippeite-group J. BRUGGER,1,2,* PETER C. BURNS,3 AND N. MEISSER4 1Department of Geology and Geophysics, The University of Adelaide, North Terrace, 5005 Adelaide, South Australia 2Division of Mineralogy, South Australian Museum, North Terrace, 5000 Adelaide, South Australia 3Department of Civil Engineering and Geological Sciences, 156 Fitzpatrick Hall, University of Notre Dame, Notre Dame, Indiana 46556- 0767, U.S.A. 4Musée Géologique Cantonal & Laboratoire des Rayons-X, Institut de Minéralogie, UNIL-BFSH2, CH-1015 Lausanne-Dorigny, Switzerland ABSTRACT Sulfate-rich acid waters produced by oxidation of sulfide minerals enhance U mobility around U ores and U-bearing radioactive waste. Upon evaporation, several secondary uranyl minerals, includ- ing many uranyl sulfates, precipitate from these waters. The zippeite-group of minerals is one of the most common and diverse in such settings. To decipher the nature and crystal chemistry of the zippeite-group, the crystal structure of a new natural hydrated Mg uranyl sulfate related to Mg- zippeite was determined. The mineral is named marecottite after the type locality, the La Creusaz U prospect near Les Marécottes, Western Swiss Alps. – Marecottite is triclinic, P1, with a = 10.815(4), b = 11.249(4), c = 13.851(6) Å, a = 66.224(7), b = 72.412(7), and g = 69.95(2)∞. The ideal structural formula is Mg3(H2O)18[(UO2)4O3(OH)(SO4)2]2(H2O)10. The crystal structure of marecottite contains uranyl sulfate sheets composed of chains of edge-shar- ing uranyl pentagonal bipyramids that are linked by vertex-sharing with sulfate tetrahedra.
    [Show full text]