DOCSLIB.ORG

The Structure of Bayldonite: Chemical Analysis, Differential Thermal Analysis, and IR Spectroscopy

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Structure of Bayldonite: Chemical Analysis, Differential Thermal Analysis, and IR Spectroscopy American Mineralogist, Volume 66, pages 148-153, 1981 The structure of bayldonite: chemical analysis, differential thermal analysis, and IR spectroscopy VALENTINA SUMtN DE PORTILLA Instituto de Geofisica, UNAM Mexico 20, D.E. MANUEL PORTILLA QUEVEDO Instituto Politecnico Nacional Mexico, D.E. AND VICTOR I. STEPANOV IMGRE, Moscow, U.S.S.R. Abstract Chemical analysis, differential thermal analysis, and IR spectroscopy show that the struc- ture of bayldonite lacks water molecules and contains OH groups coordinated with Cu atoms, as well as acid arsenate anions (HOAs03)2-. The H bonds formed by the hydroxyls of the (HOAs03)2- groups are very short and strong, with the possible appearance of a tunnel effect for the hydrogen atom. The formula CU3PbO(HOAs03)2(OH)2 is proposed. Introduction 77°::tI; a:b:c = 0.843:1:1.161.The crystal was opti- cally positive with large 2 V. The refractive indices Bayldonite is a Pb-Cu arsenate whose structure were: y = 1.99::tO.01, P = 1.98,a = 1.94 (Guillemin, has not been established. Most samples come from 1956). The calculated value (-) 2 V = 52° shows that Tsumeb in SW Africa, where it is found in the oxida- at least the value of P must be wrong. The results of tion zone of this deposit (Guillemin, 1956; Frondel Larsen: y = 1.99,P = 1.97,a = 1.95 give -2V= 89°, and Ito, 1957). Bayldonite has also been found in which could be a tolerable error. France: Verriere, Ardillats, R6he, Rebasse, Ceilhes, Bayldonite can be synthesized at 180°C and a pH Herault (Guillemin, 1956); England: uranium mine, between 5 and 8. At this temperature and at a pH of Grampound Road, Cornwall (Guillemin, 1956); and 7, bayldonite is formed from schultenite (HPbAs04) the USSR, Dzeskazghan (Satpaeva, 1961). This min- in the presence of CU(N03)2, or from a solution of eral was described by Church (1856) from St. Day, H3As04, malachite, and cerussite. When the pH is Cornwall. lowered to 3-4, duftite [CuPb(As04)(OH)] is formed Guillemin (1956) compared the chemical analysis (Guillemin, 1956). of synthetic and natural bayldonite, and gave a Cu:Pb relation of 3: I as reported previously by Mineralogical studies Church (Table 1). However, the agreement between Bayldonite used in this study occurs in the oxida- the proposed formula and the analysis is unsatisfac- tion zone of a metasomatic Pb-Zn deposit in Kay- tory, especially the excess of water molecules from rakty in central Kazakhztan. It was found in the up- the analysis. The optical properties of bayldonite per layers of barite lenses of considerable size (Larsen, 1921, p. 45) showed that this mineral has embedded in sandstone. Bayldonite is formed by monoclinic symmetry. This was confirmed by Guille- pseudomorphic substitution of cerussite, resulting in min (1956), using X-ray methods on a sample from irregular accumulations in fine-grained malachite Cap Garonne. The parameters of the unit cell are: a and azurite. Concentric accumulations of pure bayl- = 5.03:1:0.02, b = 5.97::tO.05, c = 6.93::tO.02A, P = donite reach a diameter of -7 em. Occasionally bayl- 0003-004)(/81/0102-0148$02.00 148 SUMiN DE PORTILLA ET AL: STRUCTURE OF BA YLDONITE 149 donite is found on thick spherolite-like crusts formed choidal fractures. The separation of Pb and Cu was in fractures in the barite. Concretions of bay 1- problemat.ic due to the sensitivity to pH. The results donite (up to 3 cm in diameter) in clay layers inter- of chemical analysis are given in Table 1. bedded with sandstone were also observed. In these concretions concentric color patterns occur due to al- IR spectroscopy teration in the compactness of the material. Bayl- The IR spectra were recorded on a UR-20 Zeiss donite has a characteristic apple-green color with a infrared spectrophotometer (DDR). The samples yellowish hue. Dense aggregations have an intense were prepared as emulsions in nujol on NaCl win- oily luster and show conchoidal fracture. The less dows. Deuteration of the samples was carried out in dense type is dull with an irregular fracture. The an autoclave at pressure --15 atm and at temper- dense bayldonite often shows cavities with small atures from 200° up to 500°C for a minimum of 48 crystals of anglesite and azurite. Both types of bayl- hours. Two samples were used, one from Tsumeb donite usually intergrow with beudantite, PbFe3- and another from Kayrakty. (S04)(As04)(OH)6' Microscopic examination of grain immersion mounts and thin sections of bayldonite Differential thermal analysis shows a microspherolitic structure of bayldonite ag- gregates. The dense type is homogeneous and some- DT A was carried out in a Paulik Erdel JRED-58 times small inclusions of angle site growing on DR analyzer. The samples weighed 0.4 g and the rate spherolites of bayldonite may be observed, while the of heating was 5°C/min. less dense is more heterogenous. Results Chemical analysis The data of the chemical analysis reported in The microchemical analyses were carried out in Table 1 were used to calculate two empirical for- the Institute of Geology of Mineral Deposits, Miner- alogy, Petrography, and Geochemistry of the Acad- mulas for bayldonite. (1) Bayldonite from Kayrakty: emy of Sciences of the USSR. Samples used for chemical analysis were apple-green and showed con- CU3.ooPbl.oo(As04) 1.97(P04)O.02(OH)2.03 ,0. 74H20 Table 1. Chemical analysis of bayldonite 1 2 2 3 3 4 4 Relation Relation Relation atomic of atomic Oxides of atomic of vleigh t % Weight Quantities Weight % Quantities Weight % Quantities CuO 31.61 31.70 2.996 30.88 2.968 32.5 2.98 PbO 30.30 32.60 1.004 30.13 1.032 32.1 1.049 As205 31.20 30.09 1.968 31.76 2.113 31.5 2 P205 0.20 0.021 H30+ 4.89 4.20 3.504 4.58 3.887 3.7 3.00 S03 1.00 CaO Fe203 2.65 100.00 99.79 100.00 99.8 Sp.gr. 5.24 5.35 5.42 1.- CU3 PbO (HAs04)? (Calculated) 2.- Kayrakty, CenEral Kazakhstan, USSR 3.- st. Day, Cornwall (Church, 1865) Cit, after Dana's System of Min., 7th ed. 4.- Synthetic Bayldonite (Guillemin, 1956). 150 SUM1N DE PORTILLA ET AL: STRUCTURE OF BA YLDONITE 500 600 700 qOO 1100 1300 1500 1700 1900 2100 7300 2500 2700 2(]OO 3100 3300 3500 Fig. I. IR spectra of bayldonite (in nujol): (a) Tsumeb; (b, c) Kayrakty. * = bands of nujol. (2) Bayldonite from Cornwall: (Fig. I, Table 2) in the v3(T2) region of the arsenate anion. This band is split into four components: 780 CU2.97Pbl.03(As04)2.II(OH)1.67.1.IIH20 cm-I, 815 cm-I, 840 cm-, and 870 em-I. In the defor- For the synthetic compound we obtained the for- mation vibrations region v4(T2), the same kind of mula: splitting appears with three maxima: 400 em-I, 440 em-I, and 475 em-I. The vl(A2) band is very sharp Cu2.98Pb I,05(AS04)2.00(O H)2.06 .0.47H20 and intense. The 1060 cm-I, 1090 cm-I, and 1120 From these results we conclude that the formula em-I do not shift after deuteration (Fig. 2) and are Cu3Pb(As04)2.(OH)2 cannot be correct. The two em- probably due to v3(T2)vibration of the phosphate an- piric formulas suggest that bayldonite contains a wa- ion which is present in bayldonite. The vl(AI) band ter molecule: Cu3Pb(As04)2(OH)2.H20. of the phosphate anion also appears at 970 em-I as a The IR spectra of the samples of bayldonite from weakly defined shoulder. In the Me-O (Me = metal) Tsumeb and Kayrakty both show an intense band stretching vibration region only Cu-O vibrations are Table 2. Frequencies of absorption bands in the IR spectra of bayldonite and tentative explanation of the absorption bands ---------------- era 3- - 3 ~cT PO Cu-OR .JOR...O 2"V ~::r [ASa4] 4 ~(1) [ ] en t1 Cu-O SOH Byaldonite from Tsumeb (T V (A1) ~3 2) ~4(T2) (A1) V3(T2) (T 2) A B C D and Kayrakty 1 ~1 ~4 750 780 400 970 w tV tV 1060 562 700- I--' I--' tV 0'\ 0 0'\ 0'\ 0 0 0 1..0I--'U1 815 440 1090 185 800 0 0 0 0 0 U1I--' Frequencies, 840 475 1120 cm -1 870 (540) U1I--' 0 0 ) Numbers in parentheses represent frequencies of absorption bands of deuterated samples. SUM1N DE PORTILLA ET AL: STRUCTURE OF BA YLDONITE 151 1400 1600 1BOO 2000 2400 2500 2800 3000 3200 3400 3600 , , I I I o I' ........ o z a I I I I I : I I I Fig. 2. IR spectra of deuterated sample of bayldonite from Kayrakty (a, b different concentration of bayldonite in nujol). * = bands of nujol. expected, due to the covalent nature of this bond. Discussion The vibrations of the Pb-O bond do not appear in The structure of bayldonite is unknown. From the the IR spectra because of its predominantly ionic chemical analysis of bayldonite from Kayrakty we character. Two sharp bands at 562 cm-I and 585 conclude that the empirical formula Cu3Pb em-I occur in the IR spectra of bayldonite. Analo- (AS04)2(OH)2 given by Guillemin (1956) lacks two gous bands are present in the spectra of olivenite and hydrogen atoms and an oxygen atom. The search for conichalcite (Sumin de Portilla, 1974), and euchroite a possible water molecule in the structure of bayl- and liroconite (Sumin de Portilla, unpublished re- donite is important in order to establish the correct suits).
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]
  • Thirty-Fourth List of New Mineral Names
    MINERALOGICAL MAGAZINE, DECEMBER 1986, VOL. 50, PP. 741-61 Thirty-fourth list of new mineral names E. E. FEJER Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD THE present list contains 181 entries. Of these 148 are Alacranite. V. I. Popova, V. A. Popov, A. Clark, valid species, most of which have been approved by the V. O. Polyakov, and S. E. Borisovskii, 1986. Zap. IMA Commission on New Minerals and Mineral Names, 115, 360. First found at Alacran, Pampa Larga, 17 are misspellings or erroneous transliterations, 9 are Chile by A. H. Clark in 1970 (rejected by IMA names published without IMA approval, 4 are variety because of insufficient data), then in 1980 at the names, 2 are spelling corrections, and one is a name applied to gem material. As in previous lists, contractions caldera of Uzon volcano, Kamchatka, USSR, as are used for the names of frequently cited journals and yellowish orange equant crystals up to 0.5 ram, other publications are abbreviated in italic. sometimes flattened on {100} with {100}, {111}, {ill}, and {110} faces, adamantine to greasy Abhurite. J. J. Matzko, H. T. Evans Jr., M. E. Mrose, lustre, poor {100} cleavage, brittle, H 1 Mono- and P. Aruscavage, 1985. C.M. 23, 233. At a clinic, P2/c, a 9.89(2), b 9.73(2), c 9.13(1) A, depth c.35 m, in an arm of the Red Sea, known as fl 101.84(5) ~ Z = 2; Dobs. 3.43(5), D~alr 3.43; Sharm Abhur, c.30 km north of Jiddah, Saudi reflectances and microhardness given.
    [Show full text]
  • Topographical Index
    997 TOPOGRAPHICAL INDEX EUROPE Penberthy Croft, St. Hilary: carminite, beudantite, 431 Iceland (fsland) Pengenna (Trewethen) mine, St. Kew: Bondolfur, East Iceland: pitchsbone, beudantite, carminite, mimetite, sco- oligoclase, 587 rodite, 432 Sellatur, East Iceland: pitchs~one, anor- Redruth: danalite, 921 thoclase, 587 Roscommon Cliff, St. Just-in-Peuwith: Skruthur, East Iceland: pitchstonc, stokesite, 433 anorthoclase, 587 St. Day: cornubite, 1 Thingmuli, East Iceland: andesine, 587 Treburland mine, Altarnun: genthelvite, molybdenite, 921 Faroes (F~eroerne) Treore mine, St. Teath: beudantite, carminite, jamesonite, mimetite, sco- Erionite, chabazite, 343 rodite, stibnite, 431 Tretoil mine, Lanivet: danalite, garnet, Norway (Norge) ilvaite, 921 Gryting, Risor: fergusonite (var. risSrite), Wheal Betsy, Tremore, Lanivet: he]vine, 392 scheelite, 921 Helle, Arendal: fergusonite, 392 Wheal Carpenter, Gwinear: beudantite, Nedends: fergusonite, 392 bayldonite, carminite, 431 ; cornubite, Rullandsdalen, Risor: fergusonite, 392 cornwallite, 1 Wheal Clinton, Mylor, Falmouth: danal- British Isles ire, 921 Wheal Cock, St. Just-in- Penwith : apatite, E~GLA~D i~D WALES bertrandite, herderite, helvine, phena- Adamite, hiibnerite, xliv kite, scheelite, 921 Billingham anhydrite mine, Durham: Wheal Ding (part of Bodmin Wheal aph~hitalite(?), arsenopyrite(?), ep- Mary): blende, he]vine, scheelite, 921 somite, ferric sulphate(?), gypsum, Wheal Gorland, Gwennap: cornubite, l; halite, ilsemannite(?), lepidocrocite, beudantite, carminite, zeunerite, 430 molybdenite(?),
    [Show full text]
  • 259 XLL-Chemical Researches on Some New and Rare Corn.Ish
    259 XLL-Chemical Researches on some new and rare Corn.ish Miwrals. By A. H. CHURCH,M.A., Professor of Chemistry, Royal Agricultural College, Cirencester. I. Hydrated Cerous Phosphate. THEhydrous phosphate which forms the subject of the present commnnication, occurs as a thin crust closely investing a quartzose matrix. This crust is made up of very minute crystals, generally occurring in fan-like aggregations of single rows of prisms. The faces of union of these groups are parallel to the larger lateral prismatic planes. Occasionally the structure is almost columnar, or in radiating groups, presenting a drusy surface and a general appearance somewhat resemlding that of mavellite. The mode of attachment of the crystals is such that only one of the end-faces of the prisms can be studied fully. It would appear that the crystals belong to the oblique system, and are prismatically deve- loped forms. The end-face, 001, presents the aspect of an unmodi- fied rhomboid ; occasionally, however, its diagonally opposite acute angles are replaced. Whether the appearances then presented by the crystal are due to a truncation of the solid acute angle, OF to a bevelling of the acute prismatic edge, it is difficult to say, owing to the microscopic siee of the crystals, and their parallel mode of aggregation. The plane of cleavage most easily obtained is parallel to the end- face 001; this cleavage is very perfect. Other cleavages are obtainable; one parallel to the plane previously referred to as replaciug the acute solid angles or acute prismatic edges of the crystal, the other parallel to the larger lateral prismatic planes.
    [Show full text]
  • Unusual Mineral Diversity in a Hydrothermal Vein-Type Deposit: the Clara Mine, Sw Germany, As a Type Example
    427 The Canadian Mineralogist Vol. 57, pp. 427-456 (2019) DOI: 10.3749/canmin.1900003 UNUSUAL MINERAL DIVERSITY IN A HYDROTHERMAL VEIN-TYPE DEPOSIT: THE CLARA MINE, SW GERMANY, AS A TYPE EXAMPLE § GREGOR MARKL Universitat¨ Tubingen,¨ Fachbereich Geowissenschaften, Wilhelmstraße 56, D-72074 Tubingen,¨ Germany MAXIMILIAN F. KEIM Technische Universitat¨ Munchen,¨ Munich School of Engineering, Lichtenbergstraße 4a, 85748 Garching, Germany RICHARD BAYERL Ludwigstrasse 8, 70176 Stuttgart, Germany ABSTRACT The Clara baryte-fluorite-(Ag-Cu) mine exploits a polyphase, mainly Jurassic to Cretaceous, hydrothermal unconformity vein-type deposit in the Schwarzwald, SW Germany. It is the type locality for 13 minerals, and more than 400 different mineral species have been described from this occurrence, making it one of the top five localities for mineral diversity on Earth. The unusual mineral diversity is mainly related to the large number and diversity of secondary, supergene, and low- temperature hydrothermal phases formed from nine different primary ore-gangue associations observed over the last 40 years; these are: chert/quartz-hematite-pyrite-ferberite-scheelite with secondary W-bearing phases; fluorite-arsenide-selenide-uraninite- pyrite with secondary selenides and U-bearing phases (arsenates, oxides, vanadates, sulfates, and others); fluorite-sellaite with secondary Sr- and Mg-bearing phases; baryte-tennantite/tetrahedrite ss-chalcopyrite with secondary Cu arsenates, carbonates, and sulfates; baryte-tennantite/tetrahedrite ss-polybasite/pearceite-chalcopyrite, occasionally accompanied by Ag6Bi6Pb-bearing sulfides with secondary Sb oxides, Cu arsenates, carbonates, and sulfates; baryte-chalcopyrite with secondary Fe- and Cu- phosphates; baryte-pyrite-marcasite-chalcopyrite with secondary Fe- and Cu-sulfates; quartz-galena-gersdorffite-matildite with secondary Pb-, Bi-, Co-, and Ni-bearing phases; and siderite-dolomite-calcite-gypsum/anhydrite-quartz associations.
    [Show full text]
  • Duftite Pbcu(Aso4)(OH) C 2001-2005 Mineral Data Publishing, Version 1 Crystal Data: Orthorhombic
    Duftite PbCu(AsO4)(OH) c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic. Point Group: 222. Crystals may be pseudo-octahedral, or elongated along [001], commonly curved and rough, to 5 mm; usually in crusts and aggregates. Physical Properties: Fracture: Conchoidal. Hardness = 4.5 D(meas.) = 6.40 D(calc.) = 6.602 Optical Properties: Subtranslucent. Color: Bright olive-green to gray-green; pale apple-green in transmitted light, generally zoned due to compositional variations. Streak: Pale green to white. Luster: Dull to vitreous on fractures. Optical Class: Biaxial (–). Dispersion: r> v,perceptible. α = 2.03–2.04 β = 2.06–2.08 γ = 2.08–2.10 2V(meas.) = Large. Cell Data: Space Group: P 212121 (synthetic). a = 7.768(1) b = 9.211(1) c = 5.999(1) Z=4 X-ray Powder Pattern: Tsumeb, Namibia. 3.26 (10), 2.85 (8), 2.65 (8), 2.57 (6), 4.21 (5), 2.28 (5), 1.87 (5) Chemistry: (1) (2) (3) (1) (2) (3) SiO2 0.44 CaO 0.75 0.9 + As2O5 26.01 26.1 26.93 H2O 2.65 − (Fe, Al)2O3 0.6 H2O 0.08 CuO 19.32 18.6 18.65 H2O 2.3 2.11 ZnO 0.46 0.7 Total 99.81 99.8 100.00 PbO 50.10 50.6 52.31 (1–2) Tsumeb, Namibia. (3) PbCu(AsO4)(OH). Mineral Group: Adelite group. Occurrence: An uncommon mineral in the oxidized zone of some hydrothermal base-metal deposits. Association: Olivenite, mottramite, azurite, malachite, wulfenite, calcite (Tsumeb, Namibia); bayldonite, beudantite, mimetite, cerussite (Cap Garonne mine, France).
    [Show full text]
  • Mottramite, Descloizite, and Vanadinite) in the Caldbeck Area of Cumberland
    289 New occurrences of vanadium minerals (mottramite, descloizite, and vanadinite) in the Caldbeck area of Cumberland. By ART~VR W. G. KINGSBURu F.G.S., Dept. of Geology and Mineralogy, University Museum, Oxford, and J. HARTLnY, B.Sc., F.G.S., Dept. of Geology, University of Leeds. [Taken as read 10 June 1954.] Summary.--Four new occurrences of vanadium minerals are described. New X-ray powder data are given for descloizite and mottramite, and show appreciable differences. Evidence is brought that the original occurrence of mottramite was not at Mottram St. Andrew, Cheshire, but Pim Hill, Shropshire, and that most if not all specimens labelled Mottram St. Andrew or Cheshire really came from Pim Hill. ANADIUM minerals are rare in the British Isles, and only two V species, mottramite (Cu, Zn)PbV0tOH and vanadinite Pbs(VO4)aC1, have so far been recorded from a limited number of localities. We do not include the vanadiferous nodules from Budleigh Salterton in Devon, as the vanadiferous mineral has not been identified. Mottramite, supposedly from Mottram St. Andrew in Cheshire, was first described in 1876,1 but we have evidence (below, p. 293) that the locality was in fact Pim Hill in Shropshire. ~ Vanadinite has so far only been found at Leadhills and Wanlockhead in Scotland. Vauquelinite has been de- scribed from Leadhills and Wanlockhead,a but the specimens have since been shown to be mottramite. 4 As a result of our investigations in the Lake District, we have found several new localities in the Caldbeck area for raottramite, deseloizite, and vanadinite. Higher part of Brandy Gill, Carroek Fell.
    [Show full text]
  • NEW MINERAL NAMES* Mrcnlst- Fluscnnn
    AmericanMineralogist, Volume 63, pagesi,289-1291, 1978 NEW MINERAL NAMES* Mrcnlst- Fluscnnn Arsenbrackebuschite* X-ray study showsthe mineral to be tetragonal,space group probably : : : K. Abraham,K. Kautz, E. Tillmannsand K. Walenta(1978) I4'/ a, a 4.945,c 23.268A,Z 4, G calc2.97, meas (by Arsenbrackebuschite,PbdFe,Zn)(OH,HzO)(AsO,L, a ncw 2.8-2.9 suspension).The strongestX-ray lines(39 given)are (45X arsenatemineral. Neues Jahrb. Mineral. Monatsh.. 193-196. W. 4.828 l0l ), 4.1 7 1 (70x103), 3.349 (60X1 12), 2.598( t00Xl l6), Hofmeisterand E. Tillmanns(1976) Structural relations of arsen- 2.235(50Xll8), 1.453(60X00.t6, 136,22.t0). The mineral brackebuschiteand tsumcorite.Fortschr. Mineral.,54, Teil. l, 38. is colorlessto white,luster vitreous. It is optically uniaxial,negative, o : 1.653,e = 1.642(both +0.001). Microprobeanalysis of materialfrom Tsumebgave PbO 59.4, The mineraloccurs in anhedralgrains, 0.1-0.3 mm, in rodingite ZnO 3.1,FerO, (rotal Fe) 6.5,proo 0.17,AsrOu 30.5, sum99.67Vo, dikes from an ophiolite zone in the Taurus Mts., SW Turkey. leadingto the probableformula PbdFes+,Zn)(OH,H,OXAsO.),. Associatedminerals include vuagnatite, prehnite, hydrogrossular, The material from the Clara mine containssome Cu and some chlorite,and calcite. sulfate. The nameis for Mrs. ChantalSaro. M. F. Single-crystalstudy shows the mineralto be monoclinic,space gtoupP2/ m, a : 7.764, b = 6.045,c : 9.022A, = 112.5",Z : 2. 0 Charoite* G calc 6.54.X-ray powderdata are givenfrom the two localities; the strongestlines (Clara Mine, FeKa) are 4.90(60X0ll), 3.68 V.
    [Show full text]
  • Shin-Skinner January 2018 Edition
    Page 1 The Shin-Skinner News Vol 57, No 1; January 2018 Che-Hanna Rock & Mineral Club, Inc. P.O. Box 142, Sayre PA 18840-0142 PURPOSE: The club was organized in 1962 in Sayre, PA OFFICERS to assemble for the purpose of studying and collecting rock, President: Bob McGuire [email protected] mineral, fossil, and shell specimens, and to develop skills in Vice-Pres: Ted Rieth [email protected] the lapidary arts. We are members of the Eastern Acting Secretary: JoAnn McGuire [email protected] Federation of Mineralogical & Lapidary Societies (EFMLS) Treasurer & member chair: Trish Benish and the American Federation of Mineralogical Societies [email protected] (AFMS). Immed. Past Pres. Inga Wells [email protected] DUES are payable to the treasurer BY January 1st of each year. After that date membership will be terminated. Make BOARD meetings are held at 6PM on odd-numbered checks payable to Che-Hanna Rock & Mineral Club, Inc. as months unless special meetings are called by the follows: $12.00 for Family; $8.00 for Subscribing Patron; president. $8.00 for Individual and Junior members (under age 17) not BOARD MEMBERS: covered by a family membership. Bruce Benish, Jeff Benish, Mary Walter MEETINGS are held at the Sayre High School (on Lockhart APPOINTED Street) at 7:00 PM in the cafeteria, the 2nd Wednesday Programs: Ted Rieth [email protected] each month, except JUNE, JULY, AUGUST, and Publicity: Hazel Remaley 570-888-7544 DECEMBER. Those meetings and events (and any [email protected] changes) will be announced in this newsletter, with location Editor: David Dick and schedule, as well as on our website [email protected] chehannarocks.com.
    [Show full text]
  • Cu-680-Minerals-20160321
    Mineral Name IMA Chemistry (plain) 2+ 3+ Abswurmbachite Cu Mn 6O8(SiO4) 2+ 6+ Agaite Pb3Cu Te O5(OH)2(CO3) 2+ Agardite‐(Ce) Cu 6Ce(AsO4)3(OH)6∙3H2O 2+ Agardite‐(La) Cu 6La(AsO4)3(OH)6∙3H2O 2+ Agardite‐(Nd) Cu 6Nd(AsO4)3(OH)6∙3H2O 2+ Agardite‐(Y) Cu 6Y(AsO4)3(OH)6∙3H2O Aikinite CuPbBiS3 2+ Ajoite K3Cu 20Al3Si29O76(OH)16∙8H2O Aktashite Cu6Hg3As4S12 Aldridgeite (Cd,Ca)(Cu,Zn)4(SO4)2(OH)6∙3H2O Algodonite Cu1‐xAsx (x ~0.15) 1+ 2+ Allochalcoselite Cu Cu 5PbO2(SeO3)2Cl5 2+ Alpersite (Mg,Cu )SO4∙7H2O 2+ Alumoklyuchevskite K3Cu 3AlO2(SO4)4 Ammineite CuCl2(NH3)2 Andreadiniite CuHgAg7Pb7Sb24S48 2+ 6+ Andychristyite PbCu Te O5(H2O) Andyrobertsite KCdCu5(AsO4)4[As(OH)2O2]∙2H2O Ángelaite Cu2AgPbBiS4 Anilite Cu7S4 Annivite Cu10(Fe,Zn)2Bi4S13 Anthonyite Cu(OH)2∙3H2O Antipinite KNa3Cu2(C2O4)4 2+ Antlerite Cu 3SO4(OH)4 2+ Apachite Cu 9Si10O29∙11H2O Arcubisite Ag6CuBiS4 Argentotennantite Ag6Cu4(Fe,Zn)2As4S13 Arhbarite Cu2MgAsO4(OH)3 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) 3+ Arsmirandite Na18Cu12Fe O8(AsO4)8Cl5 3+ Arthurite CuFe 2(AsO4)2(OH)2∙4H2O Arzrunite Pb2Cu4SO4(OH)4Cl6∙2H2O Ashburtonite HPb4Cu4(Si4O12)(HCO3)4(OH)4Cl Astrocyanite‐(Ce) Cu2Ce2(UO2)(CO3)5(OH)2∙1.5H2O Atacamite Cu2Cl(OH)3 Athabascaite Cu5Se4 2+ 3+ 3+ Atlasovite Cu 6Fe Bi O4(SO4)5∙KCl Attikaite Ca3Cu2Al2(AsO4)4(OH)4∙2H2O 2+ Aubertite Cu Al(SO4)2Cl∙14H2O 3+ 2+ Auriacusite Fe Cu AsO4O 2+ Aurichalcite (Zn,Cu )5(CO3)2(OH)6 Auricupride Cu3Au Avdoninite K2Cu5Cl8(OH)4∙2H2O Averievite Cu5O2(VO4)2∙CuCl2 Azurite Cu3(CO3)2(OH)2 Babánekite Cu3(AsO4)2∙8H2O 2+ 6+ Bairdite Pb2Cu 4Te 2O10(OH)2(SO4)∙H2O Balkanite
    [Show full text]
  • The Philipsbornite–Segnitite Solid-Solution Series from Rêdziny, Eastern Metamorphic Cover of the Karkonosze Granite (Sw Poland)
    Annales Societatis Geologorum Poloniae (2016), vol. 86: 73–83. doi: http://dx.doi.org/10.14241/asgp.2015.036 THE PHILIPSBORNITE–SEGNITITE SOLID-SOLUTION SERIES FROM RÊDZINY, EASTERN METAMORPHIC COVER OF THE KARKONOSZE GRANITE (SW POLAND) Bo¿ena GO£ÊBIOWSKA1, Adam W£ODEK1, Adam PIECZKA1, Olaf BORKIEWICZ2 & Marta POLAK1 1 AGH University of Science and Technology, Department of Mineralogy, Petrography and Geochemistry, Mickiewicza 30, 30-059 Kraków, Poland; e-mail: [email protected] 2 X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL60563, USA Go³êbiowska, B., W³odek, A., Pieczka, A., Borkiewicz, O. & Polak, M., 2016. The philipsbornite–segnitite solid-solution series from Rêdziny, eastern metamorphic cover of the Karkonosze granite (SW Poland). Annales Societatis Geologorum Poloniae, 86: 73–83. 3+ Abstract: Supergene minerals of the philipsbornite–segnitite series, PbAl3(AsO4)(AsO3OH)(OH)6–PbFe 3(AsO4) 3+ (AsO3OH)(OH)6, accompanied by carminite, PbFe 2(AsO4)2(OH)2, were found in relics of hydrothermal quartz– chlorite–arsenopyrite veins, associated with subordinate polymetallic ores disseminated in contact zones of a dolomitic marble deposit at Rêdziny, Western Sudetes, Poland, and recognized by means of electron microprobe and X-ray and electron-back-scattered diffraction (XRD and EBSD). Philipsbornite and segnitite, as the two minerals of the series, exhibit highly variable compositions, especially in terms of the range of Fe3+ « Al3+ substitution at the G site, with a distinct gap between the values of 0.52 and 0.89 for the Fe/(Al+Fe) ratio; substitutions at the D and T sites are less important. In this respect, the minerals are almost identical with philips- bornite and segnitite, known from other localities.
    [Show full text]
  • IMA–CNMNC Approved Mineral Symbols
    Mineralogical Magazine (2021), 85, 291–320 doi:10.1180/mgm.2021.43 Article IMA–CNMNC approved mineral symbols Laurence N. Warr* Institute of Geography and Geology, University of Greifswald, 17487 Greifswald, Germany Abstract Several text symbol lists for common rock-forming minerals have been published over the last 40 years, but no internationally agreed standard has yet been established. This contribution presents the first International Mineralogical Association (IMA) Commission on New Minerals, Nomenclature and Classification (CNMNC) approved collection of 5744 mineral name abbreviations by combining four methods of nomenclature based on the Kretz symbol approach. The collection incorporates 991 previously defined abbreviations for mineral groups and species and presents a further 4753 new symbols that cover all currently listed IMA minerals. Adopting IMA– CNMNC approved symbols is considered a necessary step in standardising abbreviations by employing a system compatible with that used for symbolising the chemical elements. Keywords: nomenclature, mineral names, symbols, abbreviations, groups, species, elements, IMA, CNMNC (Received 28 November 2020; accepted 14 May 2021; Accepted Manuscript published online: 18 May 2021; Associate Editor: Anthony R Kampf) Introduction used collection proposed by Whitney and Evans (2010). Despite the availability of recommended abbreviations for the commonly Using text symbols for abbreviating the scientific names of the studied mineral species, to date < 18% of mineral names recog- chemical elements
    [Show full text]