DOCSLIB.ORG

Blossite, A-Cu4+Y|+Or, a New Fumarolic Sublimate from Izalco

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Blossite, A-Cu4+Y|+Or, a New Fumarolic Sublimate from Izalco American Mineralogist, Volume 72, pages397-400, 1987 Blossite, a-Cu4+Y|+Or,a new fumarolic sublimate from Izalco volcano, El Salvador Paur,D. RonrxsoN Department of Geology, Southern Illinois University, Carbondale,Illinois 62901, U.S.A. JoHN M. Hucnps Department of Geology, Miami University, Oxford, Ohio 45056, U.S.A. MlnyANN L. Mal,rNcoNrco Department of Geology, Southern Illinois University, Carbondale,Illinois 62901, U.S.A. Ansrucr Blossite, a-CurYrOr, occurs as a fumarolic sublimate in the "Y" fumarole of Izalco volcano, El Salvador. The mineral is the natural analogue of the previously described synthetic phase, and is the the low-temperature polymorph of ziesite, 0-CurV'O', which was discoveredat the same site. The crystalsare orthorhombic, Fdd2, :u/rtha : 20.676(6), b:8.392(3), and c : 6.446(2)A. ttre crystal structurewas refined to R : 0.047. The atomic arrangementconsists of (100) planes of (VrOr)o- anionic groups; adjacent planes along [00] are linked by Cu2* in fivefold coordination. On the basis of previously deter- mined atomic arrangements,the a-B (blossite-ziesite)phase transition is of the non-near- est-neighborreconstructive type. Blossite occursas a equant, black anhedral crystalsup to 150 rrm in greatestdimension. The mineral has a metallic luster and a red-brown streak. The calculateddensity (Z: 8) is 4.05 I g/cm3. Blossite is opaque, and white in blue-filtered white light in air, with weak to moderate bireflectancein shadesof creamy-white, and a moderate anisotropy, from gray to creamy brown-gray. Minimum and maximum reflectancevalues (in air) are 481 nm, 14.6,15.3o/o;547 nm, 15.4,16.60/o;591 nm, 14.8,16.70/o, and,644 nm, 14.5,15.7o/o. The mineral is named in honor of Dr. F. Donald Bloss,past-President of the Mineralogical Society of America. INrnooucrroN Locll,rrv AND occuRRENcE Several high-temperature minerals have been discov- Izalco volcano, El Salvador,is a basalticcomposite cone ered in the summit crater fumaroles of Izalco volcano, El that has been intermittently active sinceits birth in 1770. Salvador, including shcherbinaite, bannermanite, stoi- The volcano risesto an altitude of 1965 m, with 650-m berite, fingerite, ziesite, and mcbirneyite. The latter four relief, and has an approximate volume of 2 km3. The minerals crystallize in the CuO-VrO, binary system and geology of the volcano is described by Meyer-Abich representthe natural analoguesofcompounds that were (1958),Rose and Stoiber(1969), and Stoiberet al. (1975). first discovered as synthetic compounds, although the As part of a long-term study of fumaroles at active naturally formed crystalshave provided the only material volcanoes, the fumarolic sublimate products of Izalco suitable for single-crystal X-ray studies for two of the volcano were collected by R. E. Stoiber and colleagues compounds.To thesefour coppervanadates is now added throughout the 1960s.Analyses of fumarolic gasconden- a fifth, a-CurVrOr, the low-temperature polymorph of satescollected simultaneouslydemonstrated that Cu and ziesite (B-CurVrOr).The authors are pleasedto name the V were distinctive elementsin the Izalco fumarolic gases. mineral blossitein honor of Dr. F. Donald Bloss,Virginia The first high-temperatureV mineral, shcherbinaite,was Polytechnic Institute and State University. Dr. Bloss has first discovered at Izalco (Stoiber and Durr, 1963), and servedthe mineralogical community in numerous capac- the existenceofseveral unidentified copper vanadatesin ities, including as President of the MSA. His researchin the fumarolic mineral suite was also noted (Stoiber and optical mineralogy is known to all mineralogists,and the Rose,1974). honor of a mineral in his name is certainly overdue. Spec- Blossite was collected from the "Y" fumarole (Stoiber imens of blossite have been deposited at the NMNH, et al., 1975) in the summit crater of Izalco volcano. The Smithsonian Institution. The mineral and mineral name mineral was found in the outer sulfate zone of the fu- have been approved by the IMA Commission on New marole, indicating a sublimation temperature between 100 Minerals and Mineral Names. and 200.C (Stoiber and Rose, 1974). Associated copper 0003404x/87l030H397$02.00 397 398 ROBINSONET AL.: BLOSSITE Vzos Mol % CuO Fig. |. Phasediagram of system CuO-VrOr (after Brisi and Molinari, 1958). vanadatesin the fumarole include stoiberite (CurVrO,o; Birnie and Hughes, 1979), ziesite (B-CurVrOr; Hughes and Birnie, 1980),fingerite [Cu,,Or(VOo)u;Hughes and Hadidiacos, 19851and mcbirneyite [Cur(YOo)r; Hughes et al., in prep.l. Only a few crystals of blossite have been isolated to date, generally 100-l 50 pm in greatestdimen- sron. Pnrvrous wonx Fig. 2. Arrangementof [VrOr]o-anionic groups in blossite. The copper vanadatesdiscovered allzalco volcano are Adjacent(100) planes of tetrahedraare linked by Cu atomsin all natural analoguesof compounds that crystallizein sys- fivefoldcoordination with oxygen.Cu atomsnot shown. tem CuO-VrO, (Fig. l), a binary system that was first studied by Brisi and Molinari (1958). Subsequentwork- ers have undertaken studies on both specificcompounds showed that of elements with Z > 10, only Cu and V within the CUO-VrO' system and phaserelations among were present. the various system compounds. Studies that are partic- Quantitative analyses were performed on an nrec ularly germaneto the presentwork are studieson ziesite, Autoscan microprobe operating at 20 kV. Cu and V metal the high-temperature polymorph of CurVrO, (Hughes and were used as standards, and the results grve 46.49(.07) Birnie, 1980; Mercurio-Lavaud and Frit, 1973a),as well wto/oCuO, 53.28(.27)wt0/o VrO, (the dewiationofanalyses as detailed structural studies on the synthetic analogueof frorn the mean in parentheses).Ideal CurVrOrhas 46.66 blossite presentedby Mercurio-Lavaud and Frit (1973b) wto/oCuO and 53.34 wto/oVrO'. and Calvo and Faggiani (1975). X-n lv cRYsrALLocRAPrrY Cnnvrrsrnv Blossite was first identified by comparison of its dif- A crystal of a blossite-fingeriteintergrowth was mount- fraction pattern to that of lcpps 26-566, the pattern of ed and polished for electron-microprobe microanalysis. synthetic a-CurVrOr. The pattern was obtained with a The crystal was estimated to be >800/oblossite from the I14.6-mm Gandolfi camera, Ni-filtered Cu radiation, in Gandolfi pattern. A qualitative energy-dispersiveanalysis vacuo. Sever"l extra lines were noted, but these were at- tributable to contamination of the crystals of blossite with either mcbirneyite or fingerite. Teeue1. Unit-cellparameters of blossiteand syn- A single-crystal precessionstudy of blossite was un- thetica-CurVrO, dertaken utilizing unfiltered Mo radiation. The available data on the synthetic analogueallowed rapid orientation of the crystal. Cone-axis and precessionphotographs of 20.676(6) 20.645(13) 20.68(1) D 8.392(3) 8.383(7) 8.411(5) the 0, l, and 2 levels along the a and b axes were taken 6.446(2) 6.442(12) 6.448(5) which displayed systematic extinctions consistent with Nole.' Columns are (1) This study; (2) Calvo and Faggiani spacegroup Fdd2 (43). (1975); (3) Mercurio-Lavaudand Frit (1973). One estimated The lattice parameters of blossite were refined from parentheses. standard deviationof least units cited is given in diffraction angles obtained from the Gandolfi photo- ROBINSON ET AL.: BLOSSITE 399 graphs and indices obtained from the precessionsuite as phase transition, three Cu-O bonds must be broken and well as Calvo and Faggiani (1975). The parameterswere reformed, although the final coordination polyhedra are in agreementwith those obtained by those authors. The identical. Thus, the phase transition is of the non-near- lattice parameterswere also refined using 22 diffraction est-neighbor reconstructive type; according to Buerger anglesmeasured on a four-circle diffractometer (Table 1). (1961), activation energiesare high for this type oftrans- formation, and reactions are tlpically sluggish.The fu- Cnvsrnr, srRUcruRE marole mineral suite from Izalco therefore contains zies- To further confirm that blossite is the natural analogue ite, which formed stably and persistsmetastably, and also of synthetic a-CurVrOr, a structure refinement of the nat- blossite, which formed when the fumarole temperatures ural phase was undertaken. However, the structure re- dropped below the inversion temperature of 710"C. finement was not completely successful.The only crystal large enough for data collection was an intergrowth of Prrvsrcll, PRoPERTIES blossite and fingerite, and thus not completely suitable. Blossite occursas equant, black anhedral crystalsup to Apparent overlap in intensities causedone oxygen atom 150 pm in greatestdimension. The mineral has a metallic to refine nonpositive defrnite when anisotropic tempera- luster. The crystals of blossite isolated to date are inter- ture factors were used. The structure ultimately refined grown with other fumarolic copper vanadatesor sulfates, to r : 0.047 vrith anisotropic temperature factors for all although severalcrystals are essentiallypure blossite. metal atoms and isotropic temperaturefactors for all oxy- Blossite has a red-brown streak, as determined from gen atoms. Our refinement servesto confirm the previ- the natural material and also noted by Mercurio-Lavaud ously determined structure. Becauseof the higher quality and Frit (1973b). The mineral does not fluorescein ul- of the previous determinations, however, the reader is traviolet radiation. The calculateddensity ofblossite (Z: referredto thoseworks for atomic coordinatesand aniso- 8; FW : 340.97)is 4.051 g,/cm3.Density valuesof 3.95 tropic temperature factors. A description of the structure (Mercurio-Lavaud and Frit, 1973b) and 3.969 g/cm3 is given below. (Calvo and Faggiani, 1975) have been reported for the Blossite is a member of that class of vanadates that synthetic analogue.No distinct cleavageswere observed crystallizes with V5+ in tetrahedral coordination with in blossite, although the anhedral, often-polycrystalline oxygen. The VOo tetrahedra in blossite dimerize in nature of the mineral grains prohibits good observations [VrOr]o groups, and thus the structure is closely related of cleavage. to that of the thortvetite-group compounds. The atomic Blossite is opaque to transmitted light.
Load more

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]
  • Euchlorine Knacu3o(SO4)3 C 2001-2005 Mineral Data Publishing, Version 1
    Euchlorine KNaCu3O(SO4)3 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic. Point Group: 2/m. As crystals, tabular on {001}, with rectangular outline, to 2 mm; typically as an incrustation. Physical Properties: Cleavage: In two directions. Hardness = n.d. D(meas.) = 3.27 D(calc.) = 3.28 Soluble in H2O. Optical Properties: Semitransparent. Color: Emerald-green; emerald-green in transmitted light. Optical Class: Biaxial (+). Pleochroism: X = pale grass-green; Y = grass-green; Z = bright yellow-green. α = 1.580 β = 1.605 γ = 1.644 2V(meas.) = Moderately large. Cell Data: Space Group: C2/a. a = 18.41(5) b = 9.43(3) c = 14.21(5) β = 113.7(3)◦ Z=8 X-ray Powder Pattern: Vesuvius, Italy. 8.44 (100), 2.816 (47), 2.544 (45), 2.843 (40), 2.852 (37), 3.475 (30), 3.237 (25) Chemistry: (1) (2) SO3 41.41 43.13 Al2O3 0.06 CuO 43.69 42.85 MgO 0.17 CaO 0.07 Na2O 6.35 5.56 K2O 8.25 8.46 Total [100.00] 100.00 (1) Vesuvius, Italy; by electron microprobe, average of seven analyses, recalculated to 100% 2− from an original total of 101.86%, (SO4) shown present by IR; corresponds to K1.01Na1.18 Mg0.02Ca0.01Cu3.15O1.27(SO4)3. (2) KNaCu3O(SO4)3. Occurrence: A rare sublimate around volcanic fumaroles. Association: Dolerophanite, eriochalcite, chalcocyanite, melanothallite (Vesuvius, Italy); stoiberite, fingerite, ziesite, th´enardite,mcbirneyite (Izalco volcano, El Salvador); eriochalcite, melanothallite, fedotovite, vergasovaite, chalcocyanite, dolerophanite, tenorite, cuprian anglesite, gold (Tolbachik volcano, Russia).
    [Show full text]
  • Oxidizing-Type Fumaroles of the Tolbachik Volcano, a Mineralogical and Geochemical Unique
    Russian Geology and Geophysics © 2020, V.S. Sobolev IGM, Siberian Branch of the RAS Vol. 61, No. 5-6, pp. 675–688, 2020 DOI:10.15372/RGG2019167 Geologiya i Geofizika Oxidizing-Type Fumaroles of the Tolbachik Volcano, a Mineralogical and Geochemical Unique I.V. Pekova,b, , A.A. Agakhanovс, N.V. Zubkovaa, N.N. Koshlyakovaa, N.V. Shchipalkinaa, F.D. Sandalova, V.O. Yapaskurta, A.G. Turchkovaa, E.G. Sidorovd a Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia b Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia c Fersman Mineralogical Museum, Leninskii pr. 18/2, Moscow, 119071, Russia d Institute of Volcanology and Seismology, Far Eastern Branch of the Russian Academy of Sciences, bul. Piipa 9, Petropavlovsk-Kamchatsky, 683006, Russia Received 1 July 2019; accepted 28 August 2019 Abstract—We overview recent data on the mineralogy of oxidizing-type fumaroles of the Tolbachik Volcano (Kamchatka, Russia), with the main focus on the chemical specifics of the minerals. The active fumarole fields of Tolbachik are the most prominent mineral- forming exhalative system of this type in the world. About 350 mineral species, including 123 minerals first discovered here, are reliably identified in the Tolbachik fumaroles. The species diversity and the specifics of this mineralization are due to the unique combination of the physicochemical conditions and mechanisms of its formation: high temperatures, atmospheric pressure, superhigh oxygen fugacity, gas transport of most of chemical elements, and direct deposition of many high-temperature minerals from volcanic gases with a specific geo- chemical composition, including strong enrichment in alkaline metals and chalcophile (“ore”) elements.
    [Show full text]
  • Copia Di IMA Master List
    The New IMA List of Minerals – A Work in Progress – Update: November 2012 In the following pages of this document a comprehensive list of all valid mineral species is presented. The list is distributed (for terms and conditions see below) via the web site of the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association, which is the organization in charge for approval of new minerals, and more in general for all issues related to the status of mineral species. The list, which will be updated on a regular basis, is intended as the primary and official source on minerals. Explanation of column headings: Name: it is the presently accepted mineral name (and in the table, minerals are sorted by name). Chemical formula: it is the CNMNC-approved formula. IMA status: A = approved (it applies to minerals approved after the establishment of the IMA in 1958); G = grandfathered (it applies to minerals discovered before the birth of IMA, and generally considered as valid species); Rd = redefined (it applies to existing minerals which were redefined during the IMA era); Rn = renamed (it applies to existing minerals which were renamed during the IMA era); Q = questionable (it applies to poorly characterized minerals, whose validity could be doubtful). IMA No. / Year: for approved minerals the IMA No. is given: it has the form XXXX-YYY, where XXXX is the year and YYY a sequential number; for grandfathered minerals the year of the original description is given. In some cases, typically for Rd and Rn minerals, the year may be followed by s.p.
    [Show full text]
  • A New Mineral Species from the Tolbachik Volcano, Kamchatka Peninsula, Russia
    921 The Canadian Mineralogist Vol. 45, pp. 921-927 (2007) DOI : 10.2113/gscanmin.45.4.921 PAUFLERITE, ␤-VO(SO4), A NEW MINERAL SPECIES FROM THE TOLBACHIK VOLCANO, KAMCHATKA PENINSULA, RUSSIA Sergey V. KRIVOVICHEV§ Department of Crystallography, St. Petersburg State University, University Emb. 7/9, St. Petersburg, 199034, Russia Lidiya P. VERGASOVA Institute of Volcanology, Russian Academy of Sciences, Bulvar Piypa 9, Petropavlovsk-Kamchatskiy, 683006, Russia Sergey N. BRITVIN Department of Mineral Deposits, St. Petersburg State University, University Emb. 7/9, St. Petersburg, 199034, Russia Stanislav K. FILATOV Department of Crystallography, St. Petersburg State University, University Emb. 7/9, St. Petersburg, 199034, Russia Volker KAHLENBERG Institut für Mineralogie und Petrographie, Leopold-Franzens-Universität Innsbruck, Innrain 52, A–6020 Innsbruck, Austria Vladimir V. ANANIEV Institute of Volcanology, Russian Academy of Sciences, Bulvar Piypa 9, Petropavlovsk-Kamchatskiy, 683006, Russia Abstract Paufl erite, ␤-VO(SO4), is a new mineral species from the fumaroles of the Great Fissure Tolbachik eruption (GFTE), Kamchatka Peninsula, Russia. It was found in 1977 in the fi rst cinder cone of the North breach of the GFTE. The mineral occurs as light green prismatic crystals up to 0.1 mm in length, associated with shcherbinaite (V2O5), an unknown Tl–Bi sulfate and fi nely crystalline Mg, Al, Fe and Na sulfates. Paufl erite is light green with a white streak and vitreous luster; the mineral is transparent and non-fl uorescent. The Mohs hardness is 3–4. Paufl erite is brittle, and without visible cleavage. The density is 3.36(4) (measured) and 3.294 g/cm3 (calculated). The mineral is biaxial, optically positive, ␣ 1.731(4), ␤ 1.778(2), ␥ 1.845(4), with 2Vmeas ≈ 90°, and 2Vcalc equal to 83°.
    [Show full text]
  • Combinatorial Synthesis and High-Throughput Characterization of Multinary Vanadate Thin-Film Materials Libraries for Solar Water Splitting’ Supervisors: Prof
    Combinatorial Synthesis and High- Throughput Characterization of Multinary Vanadate Thin-Film Materials Libraries for Solar Water Splitting Dissertation zur Erlangung des Grades Doktor-Ingenieurin der Fakultät für Maschinenbau der Ruhr-Universität Bochum von Swati Kumari aus Begusarai, India Bochum 2020 The presented work was carried out from August 2016 to April 2020 at the chair of Materials Discovery and Interfaces (MDI) under the supervision of Prof. Dr.-Ing. Alfred Ludwig in the Institute for Materials, Department of Mechanical Engineering, Ruhr-Universität Bochum, Germany. Dissertation eingereicht am: 21.04.2020 Tag der mündlichen Prüfung: 27.05.2020 Vorsitz: Prof. Dr.-Ing. Andreas Kilzer Erstgutachter: Prof. Dr.-Ing. Alfred Ludwig Zweitgutachter: Prof. Dr. rer. nat. Wolfgang Schuhmann “Child-like curiosity – seeking, questioning, and understanding – is the basis of knowledge that opens up new avenues that we call progress.” – Klaus von Klitzing – Abstract Solar water splitting using a photoelectrochemical cell (PEC) is an attractive route for the generation of clean and renewable fuels. PEC cell converts solar energy into an intermediate chemical energy carrier such as molecular hydrogen and oxygen. The solar-driven oxygen evolution at photoanode is limited due to the lack of materials with suitable optical, electronic properties, and operational stability. In this thesis, combinatorial synthesis and high- throughput characterization methods were used to investigate the suitability of multinary vanadium-based material systems for PEC application. Multinary ternary (M-V-O) and quaternary (M1-M2-V-O) metal vanadium oxide photoanodes: Fe-V-O, Cu-V-O, Ag-V-O, W-V-O, Cr-V-O, Co-V-O, Cu-Fe-V-O, and Ti-Fe-V-O materials libraries were synthesized using combinatorial reactive magnetron sputtering with a continuous composition and thickness gradients.
    [Show full text]
  • Fingerite, Curroz(Vot)Et a New Yanadium Sublimate from Lzalco Volcano, El Salvador: Descriptivemineralogy
    American Mineralogist, Volume 70, pages 193-j96, I9E5 Fingerite, CurrOz(VOt)et a new yanadium sublimate from lzalco volcano, El Salvador: descriptivemineralogy JosN M. HucHes Department of Geology Miami University, Oxford, Ohio 45056 aNo C. G. Haoruecos Geophysical Laboratory 2801 Upton Street, N.W., Washington, D. C. 20008 Abstract Fingerite, cu11o2(voa)6,o h€w copper vanadatemineral, has been discoveredin the summit crater fumaroles of Izalco volcano, El Salvador, Central America. The mineral, which occurs with thenardite and euchlorine, forms as a sublimate product from the volcanic gases.Fingerite occurs as euhedral, subhedraland anhedralcrystals up to 150pm in greatestdimension. Fingeriteis triclinic, PT,a :8.1576(6), b = 8.2691(5),c :8.0437(7)A, u: l}'t.t44(5), : F 91.389(7),y = 106.441(5)'and V = 493.84(0A3.ttre five most intense lines on the Gandolfipattern are 6.48(100;Tt0, 0tT;, 3.894(60;200,120),3.042(80; otz, t20),2.822(70; 122, 2-12)and 2.025(70 ; 203). Fingerite is black with a metallic luster and opaque.The calculateddensity of fingerite is 4-776gnlcc, z : l.In reflectedlight in air, fingeriteis mediumgray, non-pleochroicand exhibits 2 extinctions per complete rotation of the stage. The reflectance of randomly orientedgrains in blue-filteredwhite light in air is 2l-rTVo. Milligram amounts of the mineral exist. Type specimensare on deposit at the National Museum of Natural History, Smithsonian Institution and the Geophysical Laboratory, CarnegieInstitution of Washington.The mineral is namedin honor of Dr. Larry W. Finger, Geophysical Laboratory. Introduction Locality and occurrence Naturally occurring Cu11O2(VOa)6has been discovered Izalco volcano is a basaltic composite cone that has in the fumaroles in the summit crater of Izalco volcano, been intermittently active since its birth in 1770.
    [Show full text]
  • New Mineral Names*,†
    American Mineralogist, Volume 98, pages 2201–2204, 2013 New Mineral Names*,† DMITRIY BELAKOVSKIY Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia IN THIS ISSUE This New Mineral Names has entries for five new minerals, including christofschäferite-(Ce), kasatkinite, osumilite-(Mg), steklite, and vigrishinite. These new minerals have been published in Zapiski Rossiyskogo Mineralogicheskogo Obshchestva (Proceedings of the Russian Mineralogical Society) and in Novye dannye o mineralakh (New data on minerals). CHRISTOFSCHÄFERITE‑(CE)* chemical analyses (WDS, valency of Mn by XANES data, N.V. Chukanov, S.M. Aksenov, R.K. Rastsvetaeva, D.I. Bela- wt%) is: CaO 2.61 (2.24–2.98), La2O3 19.60 (19.20–19.83), kovskiy, J. Göttlicher, S.N. Britvin, and S. Möckel (2012) Ce2O3 22.95 (22.84–23.06), Pr2O3 0.56 (0.43–0.68), Nd2O3 2.28 2+ 3+ 3+ (2.01–2.50), MgO 0.08 (0–0.20), MnO 4.39 (4.27–4.51), total Christofschäferite-(Ce), (Ce,La,Ca)4Mn (Ti,Fe )3(Fe , 2+ Fe as FeO 6.98 (6.74–7.26) (apportioned in the proportions Fe ,Ti) (Si2O7)2O8, a new chevkinite-group mineral from 2+ 3+ the Eifel area, Germany. Novye dannye o mineralakh, 47, Fe :Fe = 3:2, by structural data: FeO 4.18, Fe2O3 3.11), Al2O3 33–42 (in English). 0.08 (0–0.19), TiO2 19.02 (18.64–19.39), Nb2O5 0.96 (0.83–1.11), SiO2 19.38 (19.16–19.52), total 99.20. The empirical formula 2+ 2+ A new mineral, christofschäferite-(Ce), was discovered at based on 22 O is (Ce1.72La1.48Nd0.17Pr0.04Ca0.57)Σ3.98Mn 0.76Fe 0.72 3+ the famous outcrop Wingertsbergwand (Wingertsberg Mt.) Mg0.02Ti2.935Fe 0.48Al0.02Nb0.09Si3.98O22.
    [Show full text]
  • CRYSTAL STRUCTURE of Γ-Cu2v2o7 and ITS
    671 The Canadian Mineralogist Vol. 43, pp. 671-677 (2005) CRYSTAL STRUCTURE OF ␥-Cu2V2O7 AND ITS COMPARISON TO BLOSSITE (␣-Cu2V2O7) AND ZIESITE (␤-Cu2V2O7) SERGEY V. KRIVOVICHEV§, STANISLAV K. FILATOV AND PAVEL N. CHEREPANSKY Department of Crystallography, St.Petersburg State University, University Emb. 7/9, RU-199034 St. Petersburg, Russia THOMAS ARMBRUSTER Laboratorium für chemische and mineralogische Kristallographie, Universität Bern, Freiestrasse 3, CH–3102 Bern, Switzerland OLGA YU. PANKRATOVA Department of Inorganic Chemistry, St.Petersburg State University, University Emb. 7/9, RU-199034 St. Petersburg, Russia ABSTRACT Single crystals of ␥-Cu2V2O7 were obtained by the method of chemical transport reactions. The crystal structure [triclinic, P¯1, a 5.0873(10), b 5.8233(11), c 9.4020(18) Å, ␣ 99.780(3), ␤ 97.253(3), ␥ 97.202(3)°, V 269.20(9) Å3, Z = 2] has been solved by direct methods and refined to R1 = 0.021 (wR2 = 0.049) using 949 unique observed reflections with |Fo| ≥ 4␴F. The atomic arrangement contains two symmetrically independent Cu2+ cations. The Cu(1) site is coordinated by six O atoms to form a distorted Cu(1)O6 octahedron, whereas the Cu(2) site is coordinated by five O atoms arranged at the vertices of an elongate 5+ Cu(2)O5 square pyramid. Two symmetrically independent V cations are tetrahedrally coordinated by four O atoms each. The O(5) atom bridges the V(1)O4 and V(2)O4 tetrahedra. The Cu(1)O6 octahedra and Cu(2)O5 square pyramids form two types of chains running parallel to the a axis. The chains are linked by V2O7 groups into a complex heteropolyhedral framework.
    [Show full text]
  • Curriculum Vitæ
    Curriculum Vitæ JOHN M. HUGHES Address: Department of Geolgy University of Vermont 321 Delahanty Hall Burlington, VT 05405 VOX: 802-656-9443; Fax: 802-656-0045 [email protected] Education: Ph.D., Dartmouth College, 1981 Predoctoral Fellow, Geophysical Laboratory, Carnegie Institution of Washington, 1980 A.M., Dartmouth College, 1978 A.B., Franklin and Marshall College, 1975 Academic Employment History: Administrative University of Vermont: 2006 – 2009: Provost and Senior Vice President Miami University: 2003- 2006: Associate Provost for Research & Scholarship, Dean of the Graduate School 2000-2002: Associate Dean, College of Arts and Science 1999-2000: Interim Associate Dean, College of Arts and Science 1992-1999: Chair, Dept. of Geology 1987-1992: Associate Chair, Dept. of Geology Academic University of Vermont: 2006 – : Professor, Dept. of Geology Miami University: 1992-2007: Professor, Dept. of Geology 1986-1992: Associate Professor, Dept. of Geology 1981-1986: Assistant Professor, Dept. of Geology Awards, Fellowships and Honors: A Special Session was held at the Geological Society of America National Meeting “In Honor of the Career Accomplishments of John M. Hughes”. Selected as the Distinguished Speaker by C2/m Mineralogy, Inc., at the 100th Anniversary Celebration Meeting of the Mineralogical Society of America. Selected at the 2019 Honorary Award recipient of the American Federation of Mineralogical Societies. The award includes a $4,000 scholarship for a student of my selection. 2 2017 Hawley Medal recipient, Mineralogical Association of Canada (with G. Tansman, P. Kindstedt. The mineral ophirite was named 2015 Mineral of the Year by the International Mineralogical Association based on a published paper. Invited Commencement Speaker, Department of Geosciences, Virginia Tech, 2013.
    [Show full text]
  • Shcherbinaite V2O5 C 2001-2005 Mineral Data Publishing, Version 1
    Shcherbinaite V2O5 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic. Point Group: 2/m 2/m 2/m. Acicular crystals, to 1 cm, may be lathlike, elongated along [001] and flattened on [100], in finely fibrous aggregates. Twinning: By rotation about [100], with {031} composition plane probable, as simple and geniculated contact twins. Physical Properties: Cleavage: {010} and {001}, perfect. Tenacity: Brittle. Hardness = n.d. D(meas.) = 3.38 D(calc.) = [3.37] Optical Properties: Translucent. Color: Yellow-green, golden yellow; straw-yellow in transmitted light. Luster: Vitreous. Optical Class: Biaxial. Orientation: X or Y = c. n = 2.42 2V(meas.) = n.d. Cell Data: Space Group: P nmm. a = 4.364(8) b = 11.50(2) c = 3.561(4) Z = 2 X-ray Powder Pattern: Bezymianny volcano, Russia. 4.339 (100), 2.883 (50), 4.067 (28), 3.411 (28), 2.176 (24), 5.726 (22), 2.760 (22) Chemistry: (1) (2) V2O5 39. 97.55 Na2O 3.9 LOI 12.5 insol. 42. Total 97.4 97.55 (1) Bezymianny volcano, Russia; acid insoluble = SiO2 24%, Fe2O3 3.3%, CaO 7%, Mg and Al > 1%. (2) Izalco volcano, El Salvador; by electron microprobe, maximum of 15 analyses, with no elements other than V detected. Occurrence: Deposited from fumarolic gasses, rich in halogens, at 500–550 ◦C, on the walls of volcanic fissures (Bezymianny volcano, Russia); in vanadium-bearing sublimates in fumaroles on a basaltic volcanic cone (Izalco volcano, El Salvador). Association: Bannermanite, stoiberite, ziesite, fingerite, chalcocyanite, chalcanthite (Izalco volcano, El Salvador). Distribution: From the Bezymyanniy volcano and the Tolbachik fissure volcano, Kamchatka Peninsula, Russia.
    [Show full text]
  • New Data on Minerals
    Russian Academy of Science Fersman Mineralogical Museum Volume 39 New Data on Minerals Founded in 1907 Moscow Ocean Pictures Ltd. 2004 ISBN 5900395626 UDC 549 New Data on Minerals. Moscow.: Ocean Pictures, 2004. volume 39, 172 pages, 92 color images. EditorinChief Margarita I. Novgorodova. Publication of Fersman Mineralogical Museum, Russian Academy of Science. Articles of the volume give a new data on komarovite series minerals, jarandolite, kalsilite from Khibiny massif, pres- ents a description of a new occurrence of nikelalumite, followed by articles on gemnetic mineralogy of lamprophyl- lite barytolamprophyllite series minerals from IujaVritemalignite complex of burbankite group and mineral com- position of raremetaluranium, berrillium with emerald deposits in Kuu granite massif of Central Kazakhstan. Another group of article dwells on crystal chemistry and chemical properties of minerals: stacking disorder of zinc sulfide crystals from Black Smoker chimneys, silver forms in galena from Dalnegorsk, tetragonal Cu21S in recent hydrothermal ores of MidAtlantic Ridge, ontogeny of spiralsplit pyrite crystals from Kursk magnetic Anomaly. Museum collection section of the volume consist of articles devoted to Faberge lapidary and nephrite caved sculp- tures from Fersman Mineralogical Museum. The volume is of interest for mineralogists, geochemists, geologists, and to museum curators, collectors and ama- teurs of minerals. EditorinChief Margarita I .Novgorodova, Doctor in Science, Professor EditorinChief of the volume: Elena A.Borisova, Ph.D Editorial Board Moisei D. Dorfman, Doctor in Science Svetlana N. Nenasheva, Ph.D Marianna B. Chistyakova, Ph.D Elena N. Matvienko, Ph.D Мichael Е. Generalov, Ph.D N.A.Sokolova — Secretary Translators: Dmitrii Belakovskii, Yiulia Belovistkaya, Il'ya Kubancev, Victor Zubarev Photo: Michael B.
    [Show full text]