DOCSLIB.ORG

New Mineral Names't

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

A merican M ineralogist, Volume60, pages485489, 1975 NEW MINERAL NAMES'T Mrcnenl Futscnrn. G. Y. Cneo, ANDAKIRo KAro Pt" Pto.,rPdoo.Tee 6, 3tld Pto 16Pdoq6Tes tu Brocenite and 6-Brocenite sponding to roPdoo2Teo ur, respectively,or ideally PtTer. The mineral dissolvesin warm aqua WlNc I-Hsien, WrNc Hsien-Chueh, WlNc Chung- Kuo Chi-Ti, regn. Hou Hung-Chuan (1973)Studies on mineralsof the Kang, lNo The mineral is hexagonal (by analogy to synthetic PtTez) with a 2, 86-92 (in Chinese)' fergusonite group. Ceochimica, = 4.041 and c : 5.220 A (calc). X-ray powder pattern is nearly of synthetic PtTe, and d values are significantly Analysis of brocenite gave CaO 1.26, MnO 0'03' FeO 0.95' identical to that those for moncheite (Am. Mineral' 4t, ll81)' TR,O. 46.88, UO, 0.03, uos 0.07, Tho, 8.01, sio, 0.03, Tio, smaller than the l7 lines are 2.896 l0 101, 2'086 9 102' 1'560t 103' 0.12, NbrO, 42.98, TazOu0.086, HrO- tr., HzO+ not determined, Strongest of isLa24.0,Ce42'7, and 1.0967 114. sum 100.45percent. Distribution of rareearths : Color silver gray, luster metallic. VHN (load not given) 142 Pr7.24, Nd 21.5, Sm 2.69, Eu 0.49, Gd 1.04' Dy 0'36 percent. observed' Bireflectance with fergusonite. Most kg/mm', Sp. gr. > 10. Cleavage not The mineral is monoclinic, isomorphous = bright to grayish white. Reflectance(in oil) 5l'6 (green)' grains are metamict. Strongest X-ray lines (22 given) of material weak, 42.9 (orange), 42.1 (red). Distinctly anisotropic from pale grayish heated at l000oC for one hour are 3.24 10, 3.058 l0' 1.965 l0' l.9lO 8, 1.7068, | 677 8' l'608 8. Cell parameters calculated from powder daraarea : 5.lg,b = 11.34,c : 5.48 A. and0 : 84"57'. The mineral occurs as well formed crystals, frequently ter- minated with bipyramid. Color red to reddish brown, luster vitreous to greasy. SP. gr. : 5.34. No analysis was given for p-brocenite, the non-metamict Hg and Pd, and a telluride of Hg, Ag' and Pd. dquivalent of brocenite. The powder pattern of p-brocenite is The name is for the locality, on which no information is given' similar to that of brocenite with strongest lines 3.21 10, 3.07 l0' very low G.Y.C. I "963t, l.9l I 7, I .708 6, 1.6746, l.6l I 6. B-brocenite has content of radioactive elements. Both brocsnite and f-brocenite occur in a skarn deposit in Discussion China, associatedwith diopside, phlogopite, Ce-apatite, Northern The mineral is evidently a bismuth-free variety of moncheite calcite, and topaz (?). (Am Mineral.4E, 1l8l) and the name chengboliteis unnecessary' M.F. Discussion Ferrihydrite* Brocenite is the cerium analog of fergusonite. The name is ap- V., B. B. Zvvecttl, A. I. Gonssxov' L' P' ER- parently derived from the Chinese name which literally means a Csurunov, F. MrLovA, nNn V. V. Bellssovl (1973) Ferrihydtite' Izuest' brown-cerium-niobium mineral. The name 0-brocenite is unneces- Nauk S.S.S.R. ln3, 23-33 (in Russian)' sary. It is most unfortunate that the type locality is not given. Akad. G.Y.C. The phase previously reported by Towe and Bradley (1967)' If the Levinson rule is followed (Am. Mineral' 5l' 152-158, Jackson and Keller (19?0), and Chukhrov et al (1971) has now 1966), brocenite should be called Beta-fergusonite-(Ce).M.F. been named ferrihydrite. Ten analyses are given, showing con- siderdBlevariation in composition (impurities in part)' The formula is break near l80o Chengbolite 5FezOr.9HrO.Drl curvesshow an endothermic and an exothermic break at 350-400'. The infra-red spectrum SuN Wei-Chun, Lt Chao-Lung, JrN Yao-Wu, CnlNc Ying-Chen, shows bandsdue to molecularwater at about 3450and 1620cm-'; CseNc Wan-Lu, Yunr Wen-Hsi, AND LI Wan Tang (1973) no bands of hydroxyl were noted. The water is lost continuously up Chengbolite-a platinum group mineral in Precambrian to 450". The mineral was synthesized by slow hydrolysis of ferric eclogite. Acta Geol. Sinica, 1,89-93 (in Chinese). salts at pH above 3 and below 9'5. The presenceof iron bacteria greatly increasesthe Yield. Probe analysesgave Pt 39.4, 37.0; Pd 2.2,3.96; Te 66.3, 68.0; X-ray study shows strongest lines 2.50-2'54 (vs) /10' 2'21-2'28 sum 107.9,108.96 percent; and wet microchemicalanalysis gave Pt - (s) tt2,1.96-r.98 (s) 11-1,l'70-1.725 (w s)tt4' 1.47-148 (m to Pd 3.26,Te 58.16,Bi not found, sum 97.28percent, corre- 35.86, vs) 300. Electron diffraction study gives a hexagonal cell with a 5.08, c 9.4 A. The structure has been worked out; it contains * Minerals marked with an asterisk after the name were ap- FeO"-octahedra. ochers to dark brown proved before publication by the Commission on New Minerals The mineral occurs as yellow-brown and Bradley)' and Mineral Names of the International Mineralogical Associa- masses.G 3.96 (synthetic, Towe and hot springs,especially those tlon. The mineral occurs in both cotd 485 486 NEW MINERAL NAMES in which iron bacteria (Galtionelta, Leptolhrix, or Toxothrix) are Color grayish-white.Distinctly anisotropicwith color greenish- present and brownish-grayunder crossednicols. Cleavage {100} excellent. The name is for the composition. M,F. Reflectances(max., min): 480 nm, 33.7,29.8;540nm, 33.2,290; References 600 nm, 329, 28.6:640nm, 32 5,28 I percent. The name is for the Incas,first recordedminers ofAg-Sn oresof CHuxnnov, F. Y ., (197 et al l) Izuest Akad. Nauk SSSR, Ser.Geol. the area Type material is in the Redpath Museum, McGill No l. University, Montreal. M.F. JecxsoN, T. A , nNn W. D. KeLr-sR.(1970) Am J Sci 269, No. 5 Tows, K M., rNo W. F. Bneolry (1967)J. Colloid Inrerface Sci. 24, No. 3. Khademite Prennr BentnND,JEAN-PAUL BrnrHrloN, FAstgNCrsnnoN. eNo MrNoucHen (1973) Graemite* Seonzeors Un nouveau sulfate hydrate d'aluminum: la khademite de Saghand(lran). C. R. S. A Wrr-lrnvs, ANDPHrLLrp MArrER, III (1975)Graemite, a new Acad. Sci. Paris,277D. 1585-1588 Bisbee mineral. Mineral Rec. 6, 32-34. Analysisgave Al,O3 21.6(wet chem SO,35.2,HrO 41.7(Tce Microchemical analysesby M. Duggan gave TeO2 60.9, 61.4, ), on 3.5 mg), sum 98.5 percent, corresponding to AlrOr.2.08 6l .4 av 6l .2; CuO 3 I .0, 3 I 9, 30.0,av. 3 L0; H,O (penfieldmerhod) SOo l0.9 HrO, or AI(SO4)(OH).5HrO. Specrrographic 7.0,9.5, av. 8.2, sum 100.4percent, corresponding to CuTeOr.H,O. analysis showed Fe 0.1, Si 0.05, Na 0.02, Mg 0.01, Ti 0.005, per- Spectrographicanalysis showed a trace of Ag. Microchemicaltests Cu 0.002 cent. The Dre curve on 3.8 mg showeda large endothermic for tellurite were positive, for tellurate, halides, and sulfate effect at 178" (loss of H,O), another smaller one at 678o (loss negative The mineral is insolublein water, easilysoluble in cold of SOr), and a large one at 8030 (loss of remaining SOs).A Tcl dilute acidsor 407oKOH. When heated,it decrepitatesand fuses curve is glven easily to a gray blebly slag. Precessiondata show the mineral to be orthorhombic. soace The mineral occursas crystalsup to 8 mm long showingforms a groupPcab, a ll.l78,b | 3.055,c 10.887(all * 0.004)A, Z = 8.-The {100}, b {010}, c {001}, and d l02tl. Rotation and Weissenberg strongestX-ray lines (63 given) arc 4.247 100 220,4 photographsshow the mineral to be orthorhombic, spacegroup 17911 022, 3.90152 202,2.7305924 /. Crystalsshow the forms (010)and (001) probably Pcmm,a 6.805+ 0.006,b 25.613+ 0.015,c 5.780* 0.006 : (dominant),also (ll0), (lll), and (313). A, Z tO,C calc4.24, meas 4.13 t 0.09.The strongesrX-ray lines The mineral is colorless,no cleavageobserved. (28 given) are 12.8035 020, 6.395l0 U0, 3.434I 06t, 2 8734 012, G 1.925.Optical- 2.5s85 0.t00, 09r,2.343 4 0.10.1 ly biaxial, negative,ns a 1.44(calc), B | .460,I | .497, 2V 6g+1", Z=a, Y:b, dispersionnot given. lt was found at The mineral is blue-green,near jade green. H 3-3 5, brittle. Saghand,lran, associated with copiapite, butlerite, parabutlerite, jarosite, Cleavage {010} good, parting {100}. Not fluorescent.Optically amarantite,and alunogen.The name is for N. Khadem, Director. biaxial,pos., ns (Na) a1.920 + 0.003,pt.960 +0.003..v2.20 +220 Geological Survsy 6; Iran. M.F. + 0.005,2V + 48.5., dispersionnot observed,pleochroic with X yellowish-green,I, and Z blue-green,absorption y > Z = X. The mineral, collectedin 1959from the 1200ft. levelof the Cole Kinoshitalitex shaft, Bisbee, Arizona, occurs replacing teineite crystals embedded M. YosHrr,K. Mesnl, T. KAro, T. WeuNnrr, S. Yur, A. Klro, in malachite. Cuprite is associated A second occurrence is from a eNn K. NlclsHlrue (1973)Kinoshitalite, a new mineral from the prospect in the Dome Rock Mts., Yuma Co., Arizona, where the Noda-Tamagawa mine, Iwate Prefecturc. Chigaku Kenkyu mineral occurs replacingteineite, in cavitiesin samplescontaining (Geosci Mag.),24, l8l-190 (in Japanese). chalcocite,corroded bornite, weissite,brochantite, malachite, and goethite. Chemical analysisby K. Maeda and K Nagashima gave SiO, 24.58,TiOr 0.
Recommended publications
  • An Application of Near-Infrared and Mid-Infrared Spectroscopy to the Study of 3 Selected Tellurite Minerals: Xocomecatlite, Tlapallite and Rodalquilarite 4 5 Ray L

    An Application of Near-Infrared and Mid-Infrared Spectroscopy to the Study of 3 Selected Tellurite Minerals: Xocomecatlite, Tlapallite and Rodalquilarite 4 5 Ray L

    QUT Digital Repository: http://eprints.qut.edu.au/ Frost, Ray L. and Keeffe, Eloise C. and Reddy, B. Jagannadha (2009) An application of near-infrared and mid- infrared spectroscopy to the study of selected tellurite minerals: xocomecatlite, tlapallite and rodalquilarite. Transition Metal Chemistry, 34(1). pp. 23-32. © Copyright 2009 Springer 1 2 An application of near-infrared and mid-infrared spectroscopy to the study of 3 selected tellurite minerals: xocomecatlite, tlapallite and rodalquilarite 4 5 Ray L. Frost, • B. Jagannadha Reddy, Eloise C. Keeffe 6 7 Inorganic Materials Research Program, School of Physical and Chemical Sciences, 8 Queensland University of Technology, GPO Box 2434, Brisbane Queensland 4001, 9 Australia. 10 11 Abstract 12 Near-infrared and mid-infrared spectra of three tellurite minerals have been 13 investigated. The structure and spectral properties of two copper bearing 14 xocomecatlite and tlapallite are compared with an iron bearing rodalquilarite mineral. 15 Two prominent bands observed at 9855 and 9015 cm-1 are 16 2 2 2 2 2+ 17 assigned to B1g → B2g and B1g → A1g transitions of Cu ion in xocomecatlite. 18 19 The cause of spectral distortion is the result of many cations of Ca, Pb, Cu and Zn the 20 in tlapallite mineral structure. Rodalquilarite is characterised by ferric ion absorption 21 in the range 12300-8800 cm-1. 22 Three water vibrational overtones are observed in xocomecatlite at 7140, 7075 23 and 6935 cm-1 where as in tlapallite bands are shifted to low wavenumbers at 7135, 24 7080 and 6830 cm-1. The complexity of rodalquilarite spectrum increases with more 25 number of overlapping bands in the near-infrared.
  • New Mineral Names*,†

    New Mineral Names*,†

    American Mineralogist, Volume 104, pages 625–629, 2019 New Mineral Names*,† DMITRIY I. BELAKOVSKIY1 AND FERNANDO CÁMARA2 1Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18 korp. 2, Moscow 119071, Russia 2Dipartimento di Scienze della Terra “Ardito Desio”, Universitá di degli Studi di Milano, Via Mangiagalli, 34, 20133 Milano, Italy IN THIS ISSUE This New Mineral Names has entries for 8 new minerals, including fengchengite, ferriperbøeite-(Ce), genplesite, heyerdahlite, millsite, saranchinaite, siudaite, vymazalováite and new data on lavinskyite-1M. FENGCHENGITE* X-ray diffraction pattern [d Å (I%; hkl)] are: 7.186 (55; 110), 5.761 (44; 113), 4.187 (53; 123), 3.201 (47; 028), 2.978 (61; 135). 2.857 (100; 044), G. Shen, J. Xu, P. Yao, and G. Li (2017) Fengchengite: A new species with 2.146 (30; 336), 1.771 (36; 24.11). Single-crystal X-ray diffraction data the Na-poor but vacancy-dominante N(5) site in the eudialyte group. shows the mineral is trigonal, space group R3m, a = 14.2467 (6), c = Acta Mineralogica Sinica, 37 (1/2), 140–151. 30.033(2) Å, V = 5279.08 Å3, Z = 3. The structure was solved by direct methods and refined to R = 0.043 for all unique I > 2σ(I) reflections. Fengchengite (IMA 2007-018a), Na Ca (Fe3+,) Zr Si (Si O ) 12 3 6 3 3 25 73 Fenchengite is the Fe3+ analog of eudialyte with a structural difference (H O) (OH) , trigonal, is a new eudialyte-group mineral discovered in 2 3 2 in vacancy dominant N5 site and splitting its Na site N1 into N1a and the agpaitic nepheline syenites and its pegmatite facies near the Saima N1b sites.
  • Mineral Processing

    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
  • Download the Scanned

    Download the Scanned

    THE AMERICAN MINERALOGIST, VOL. 52, SEPTEMSER_OCTOBER, 1967 NEW MINERAL NAMES Mrcn,rBr F-r-Brscnnn Lonsdaleite Cr.u'lonn FnoNoer. lNn Uxsule B. MenvrN (1967) Lonsdaleite, a hexagonai polymorph oi diamond. N atwe 214, 587-589. The residue (about 200 e) from the solution of 5 kg of the Canyon Diablo meteorite was found to contain about a dozen black cubes and cubo-octahedrons up to about 0.7 mm in size. They were found to consist of a transparent substance coated by graphite. X-ray data showed the material to be hexagonal, rvith o 2.51, c 4.12, c/a I.641. The strongest X-ray lines are 2.18 (4)(1010), 2.061 (10)(0002), r.257 (6)(1120), and 1.075 (3)(rrr2). Electron probe analysis showed only C. It is accordingly the hexagonal (2H) dimorph of diamond. Fragments under the microscope were pale brownish-yellow, faintly birefringent, a slightly higher than 2.404. The hexagonal dimorph is named lonsdaleite for Prof. Kathleen Lonsdale, distin- guished British crystallographer. It has been synthesized by the General Electric co. and by the DuPont Co. and has also been reported in the Canyon Diablo and Goalpara me- teorites by R. E. Hanneman, H. M. Strong, and F. P. Bundy of General Electric Co. lSci.enc e, 155, 995-997 (1967) l. The name was approved before publication by the Commission on New Minerals and Mineral Names, IMA. Roseite J. OrrnueNn nNl S. S. Aucusrrtnrs (1967) Geochemistry and origin of "platinum- nuggets" in lateritic covers from ultrabasic rocks and birbirites otW.Ethiopia.
  • Spiridonovite, (Cu1-Xagx)2Te (X ≈ 0.4), a New Telluride from the Good Hope Mine, Vulcan, Colorado (U.S.A.)

    Spiridonovite, (Cu1-Xagx)2Te (X ≈ 0.4), a New Telluride from the Good Hope Mine, Vulcan, Colorado (U.S.A.)

    minerals Article Spiridonovite, (Cu1-xAgx)2Te (x ≈ 0.4), a New Telluride from the Good Hope Mine, Vulcan, Colorado (U.S.A.) Marta Morana 1 and Luca Bindi 2,* 1 Dipartimento di Scienze della Terra e dell’Ambiente, Università di Pavia, Via A. Ferrata 7, I-27100 Pavia, Italy; [email protected] 2 Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Via G. La Pira 4, I-50121 Firenze, Italy * Correspondence: luca.bindi@unifi.it; Tel.: +39-055-275-7532 Received: 7 March 2019; Accepted: 22 March 2019; Published: 24 March 2019 Abstract: Here we describe a new mineral in the Cu-Ag-Te system, spiridonovite. The specimen was discovered in a fragment from the cameronite [ideally, Cu5-x(Cu,Ag)3+xTe10] holotype material from the Good Hope mine, Vulcan, Colorado (U.S.A.). It occurs as black grains of subhedral to anhedral morphology, with a maximum size up to 65 µm, and shows black streaks. No cleavage is −2 observed and the Vickers hardness (VHN100) is 158 kg·mm . Reflectance percentages in air for Rmin and Rmax are 38.1, 38.9 (471.1 nm), 36.5, 37.3 (548.3 nm), 35.8, 36.5 (586.6 nm), 34.7, 35.4 (652.3 nm). Spiridonovite has formula (Cu1.24Ag0.75)S1.99Te1.01, ideally (Cu1-xAgx)2Te (x ≈ 0.4). The mineral is trigonal and belongs to the space group P-3c1, with the following unit-cell parameters: a = 4.630(2) Å, c = 22.551(9) Å, V = 418.7(4) Å 3, and Z = 6.
  • Alkalic-Type Epithermal Gold Deposit Model

    Alkalic-Type Epithermal Gold Deposit Model

    Alkalic-Type Epithermal Gold Deposit Model Chapter R of Mineral Deposit Models for Resource Assessment Scientific Investigations Report 2010–5070–R U.S. Department of the Interior U.S. Geological Survey Cover. Photographs of alkalic-type epithermal gold deposits and ores. Upper left: Cripple Creek, Colorado—One of the largest alkalic-type epithermal gold deposits in the world showing the Cresson open pit looking southwest. Note the green funnel-shaped area along the pit wall is lamprophyre of the Cresson Pipe, a common alkaline rock type in these deposits. The Cresson Pipe was mined by historic underground methods and produced some of the richest ores in the district. The holes that are visible along several benches in the pit (bottom portion of photograph) are historic underground mine levels. (Photograph by Karen Kelley, USGS, April, 2002). Upper right: High-grade gold ore from the Porgera deposit in Papua New Guinea showing native gold intergrown with gold-silver telluride minerals (silvery) and pyrite. (Photograph by Jeremy Richards, University of Alberta, Canada, 2013, used with permission). Lower left: Mayflower Mine, Montana—High-grade hessite, petzite, benleonardite, and coloradoite in limestone. (Photograph by Paul Spry, Iowa State University, 1995, used with permission). Lower right: View of north rim of Navilawa Caldera, which hosts the Banana Creek prospect, Fiji, from the portal of the Tuvatu prospect. (Photograph by Paul Spry, Iowa State University, 2007, used with permission). Alkalic-Type Epithermal Gold Deposit Model By Karen D. Kelley, Paul G. Spry, Virginia T. McLemore, David L. Fey, and Eric D. Anderson Chapter R of Mineral Deposit Models for Resource Assessment Scientific Investigations Report 2010–5070–R U.S.
  • An Overview of Minerals Toxicity, by RDG, 2014-2020

    An Overview of Minerals Toxicity, by RDG, 2014-2020

    AN OVERVIEW OF MINERALS TOXICITY Written by RDG, 2014 Copyright © 2014 - 2020, RDG. All rights reserved. First published electronically November 2014. Last updated December 19, 2020. Disclaimer: This article is not intended as an authoritative text. The author cannot be held responsible for your safety. TABLE OF CONTENTS 1.INTRODUCTION …................................................................................................................. 3 1.1.Why discuss the toxicity of minerals …....................................................................................3 1.2.A few basic notions of toxicology …........................................................................................ 3 1.2.1.Dose …...................................................................................................................................3 1.2.2.Bioavailability …................................................................................................................... 3 1.2.3.Toxicity class, Acute toxicity, and Median lethal dose …......................................................3 1.2.4.Chronic toxicity …................................................................................................................. 4 1.2.5.Carcinogenic, Mutagenic, Reprotoxic …...............................................................................4 1.3.Risk assessment ….................................................................................................................... 4 2.TOXICITY OF MINERALS …...............................................................................................
  • A Review of the Structural Architecture of Tellurium Oxycompounds

    A Review of the Structural Architecture of Tellurium Oxycompounds

    Mineralogical Magazine, May 2016, Vol. 80(3), pp. 415–545 REVIEW OPEN ACCESS A review of the structural architecture of tellurium oxycompounds 1 2,* 3 A. G. CHRISTY ,S.J.MILLS AND A. R. KAMPF 1 Research School of Earth Sciences and Department of Applied Mathematics, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia 2 Geosciences, Museum Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia 3 Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA [Received 24 November 2015; Accepted 23 February 2016; Associate Editor: Mark Welch] ABSTRACT Relative to its extremely low abundance in the Earth’s crust, tellurium is the most mineralogically diverse chemical element, with over 160 mineral species known that contain essential Te, many of them with unique crystal structures. We review the crystal structures of 703 tellurium oxysalts for which good refinements exist, including 55 that are known to occur as minerals. The dataset is restricted to compounds where oxygen is the only ligand that is strongly bound to Te, but most of the Periodic Table is represented in the compounds that are reviewed. The dataset contains 375 structures that contain only Te4+ cations and 302 with only Te6+, with 26 of the compounds containing Te in both valence states. Te6+ was almost exclusively in rather regular octahedral coordination by oxygen ligands, with only two instances each of 4- and 5-coordination. Conversely, the lone-pair cation Te4+ displayed irregular coordination, with a broad range of coordination numbers and bond distances.
  • Cation Ordering and Pseudosymmetry in Layer Silicates'

    Cation Ordering and Pseudosymmetry in Layer Silicates'

    I A merican M ineralogist, Volume60. pages175-187, 1975 Cation Ordering and Pseudosymmetryin Layer Silicates' S. W. BerI-nv Departmentof Geologyand Geophysics,Uniuersity of Wisconsin-Madison Madison, Wisconsin5 3706 Abstract The particular sequenceof sheetsand layers present in the structure of a layer silicate createsan ideal symmetry that is usually basedon the assumptionsof trioctahedralcompositions, no significantdistor- tion, and no cation ordering.Ordering oftetrahedral cations,asjudged by mean l-O bond lengths,has been found within the constraints of the ideal spacegroup for specimensof muscovite-3I, phengile-2M2, la-4 Cr-chlorite, and vermiculite of the 2-layer s type. Many ideal spacegroups do not allow ordering of tetrahedralcations because all tetrahedramust be equivalentby symmetry.This includesthe common lM micasand chlorites.Ordering oftetrahedral cations within subgroupsymmetries has not beensought very often, but has been reported for anandite-2Or, llb-2prochlorite, and Ia-2 donbassite. Ordering ofoctahedral cations within the ideal spacegroups is more common and has been found for muscovite-37, lepidolite-2M", clintonite-lM, fluoropolylithionite-lM,la-4 Cr-chlorite, lb-odd ripidolite, and vermiculite. Ordering in subgroup symmetries has been reported l-oranandite-2or, IIb-2 prochlorite, and llb-4 corundophilite. Ordering in local out-of-step domains has been documented by study of diffuse non-Bragg scattering for the octahedral catlons in polylithionite according to a two-dimensional pattern and for the interlayer cations in vermiculite over a three-cellsuperlattice. All dioctahedral layer silicates have ordered vacant octahedral sites, and the locations of the vacancies change the symmetry from that of the ideal spacegroup in kaolinite, dickite, nacrite, and la-2 donbassite Four new structural determinations are reported for margarite-2M,, amesile-2Hr,cronstedtite-2H", and a two-layercookeite.
  • Raman Spectroscopic Study of the Tellurite Minerals: Carlfriesite and Spirof- fite

    Raman Spectroscopic Study of the Tellurite Minerals: Carlfriesite and Spirof- fite

    This may be the author’s version of a work that was submitted/accepted for publication in the following source: Frost, Ray, Dickfos, Marilla,& Keeffe, Eloise (2009) Raman spectroscopic study of the tellurite minerals: Carlfriesite and spirof- fite. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 71(5), pp. 1663-1666. This file was downloaded from: https://eprints.qut.edu.au/17256/ c Copyright 2009 Elsevier Reproduced in accordance with the copyright policy of the publisher 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.2008.06.014 QUT Digital Repository: http://eprints.qut.edu.au/ Frost, Ray L. and Dickfos, Marilla J. and Keeffe, Eloise C. (2009) Raman spectroscopic study of the tellurite minerals : carlfriesite and spiroffite. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 71(5). pp. 1663-1666. © Copyright 2009 Elsevier Raman spectroscopic study of the tellurite minerals: carlfriesite and spiroffite Ray L. Frost, • Marilla J. Dickfos and Eloise C. Keeffe Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane Queensland 4001, Australia. ---------------------------------------------------------------------------------------------------------------------------- Abstract Raman spectroscopy has been used to study the tellurite minerals spiroffite 2+ and carlfriesite, which are minerals of formula type A2(X3O8) where A is Ca for the mineral carlfriesite and is Zn2+ and Mn2+ for the mineral spiroffite.
  • QUT Digital Repository

    QUT Digital Repository

    QUT Digital Repository: http://eprints.qut.edu.au/ Frost, Ray L. and Keeffe, Eloise C. (2009) Raman spectroscopic study of the tellurite minerals: graemite CuTeO3.H2O and teineite CuTeO3.2H2O. Journal of Raman Spectroscopy, 40(2). pp. 128-132. © Copyright 2009 John Wiley and Sons . 1 Raman spectroscopic study of the tellurite minerals: graemite CuTeO3 H2O and . 2 teineite CuTeO3 2H2O 3 4 Ray L. Frost • and Eloise C. Keeffe 5 6 Inorganic Materials Research Program, School of Physical and Chemical Sciences, 7 Queensland University of Technology, GPO Box 2434, Brisbane Queensland 4001, 8 Australia. 9 10 11 Tellurites may be subdivided according to formula and structure. 12 There are five groups based upon the formulae (a) A(XO3), (b) . 13 A(XO3) xH2O, (c) A2(XO3)3 xH2O, (d) A2(X2O5) and (e) A(X3O8). Raman 14 spectroscopy has been used to study the tellurite minerals teineite and 15 graemite; both contain water as an essential element of their stability. 16 The tellurite ion should show a maximum of six bands. The free 17 tellurite ion will have C3v symmetry and four modes, 2A1 and 2E. 18 Raman bands for teineite at 739 and 778 cm-1 and for graemite at 768 -1 2- 19 and 793 cm are assigned to the ν1 (TeO3) symmetric stretching mode 20 whilst bands at 667 and 701 cm-1 for teineite and 676 and 708 cm-1 for 2- 21 graemite are attributed to the the ν3 (TeO3) antisymmetric stretching 22 mode. The intense Raman band at 509 cm-1 for both teineite and 23 graemite is assigned to the water librational mode.
  • Bi-Se-Te Mineralization from Úhorná (Spišsko Gemerské Rudohorie Mts., Slovakia): a Preliminary Report

    Bi-Se-Te Mineralization from Úhorná (Spišsko Gemerské Rudohorie Mts., Slovakia): a Preliminary Report

    MINERALOGIA, 39, No. 3–4: 87–103 (2008) DOI: 10.2478/v10002-008-0007-3 www.Mineralogia.pl MINERALOGICAL SOCIETY OF POLAND POLSKIE TOWARZYSTWO MINERALOGICZNE Original paper Bi-Se-Te mineralization from Úhorná (Spišsko Gemerské Rudohorie Mts., Slovakia): A preliminary report Jaroslav PRŠEK1*, Dušan PETEREC2 1 Comenius University, Faculty of Natural Sciences, Department of Mineralogy and Petrology, Mlynská dolina 842 15, Bratislava; e-mail: [email protected] 2 Aragonit s.r.o, Rovníková 8, 040 12 Košice * Corresponding author Received: January 31, 2008 Accepted: January 07, 2009 Abstract. An unusual association of Se minerals was studied. Se enters into the structures of sulphosalts – into bournonite, jamesonite and tintinaite at concentrations up to 0.10, 0.38 and 1.11 apfu, respectively. However, Se and Te, together with Bi, also form discrete minerals such as tetradymite, laitakarite, ikunolite and hedleyite. Members of the laitakarite-ikunolite solid solution display a wide range of anion substitution from the nearly Se-free (0.10 apfu) end member to the S-poor (0.42 apfu) end member. Their contents of Te are low. Accompanying tetrahedrite does not contain Se or Te. Key-words: laitakarite-ikunolite solid solutions, sulphosalts, tetradymite, Slovakia, Úhorná 1. Introduction In Slovakia, occurrences of Se- and Te minerals are relatively rare in comparison with other sulphide minerals. Besides occurrences in Neogene volcanites (neovolcanites), they have only been identified in a few localities. Tellurides of Bi, Au and Ag occur in the neovolcanites. Tetradymite was described from upkov, Hodruša, Bukovec and Kopanice (Zepharovich 1859, 1873; Lexa et al. 1989; Kalinaj, Bebej 1992; Mao, Bebej 1994; Jeleò 2003; Sejkora et al.