DOCSLIB.ORG

Download the Scanned

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Download the Scanned INDEX TO VOLUME 25 Leading articles are in bold face type; notes, abstracts and reviews are in ordinary type. Only minerals for which definite data are given are indexed. Ablykite. (Sedletzky, Yussupova). /od Aurichalcitein Missouri.(Keller). 375 Acanthite, crystal system and unit Austinite(structural data). ... 457 cell. (Ramsdell).. 2r2 Australite structures and their or- Adigeite. (Efremov) 155 igin.(Baker) . .. .... 154 Adirondack igneous rocks and their Axinite, plum colored, new local- metamorphism. (Buddington) ityfor.. ... 552 [Book review] 305 Ayres,V. L. Mineral notesfrom the Akerman it e-gehlen it e-pse ud owol - Michigan iron country. .203, 432 lastonite system. (Osborn, Schairer) 2Il Bagrowski, B. P. Occurrence of Albite-sphene binary system. millerite at Milwaukee, Wis- (Prince) 212 consin.. J.)O Albite-twinning lamellae, width of , Baker, G. Cordierite granite from (Donnay). 578 Terip Terip, Victoria 543 Allanite from Barringer llill, Llano 154 Co., Texas. (Marble) 168 Barth, T. F. W., Correns,C. W., Allanite (optical data and analysis) 397 Eskola, P. Die Enstehungder Allchin, J. P.. 378 Gesteine.[Book review]. 308 Allen, V. T. and'VIIells, R. C. with 'Wentworth, Bartlett meteorite, Bell Co., Texas. C. K, Ceramic (Bullard).. ...205,497 clayinHawaii. ... 1 Bastn?isite(optical data) . 401 Alling, H. L. Book review. JU) Behre,C. H. Jr.. 203 Alumodeveillite. (Ef remov) 313 Bcll,K. G. ... 208 Alunite. 38 Bellingerite, a new mineral from Amblygonite. (structural data) +l.t Chuquicamata, Chile. (Ber- Analyses of metamorphic and ig- man, W'olfe). 505 'Wolfe, neous rocks, geographical clas- Berman, H. and C. W. sificationof. (Mathews) ..... 209 Bellingerite, a new mineral Anapaite 788 from Chuquicamata,Chile. .. 505 Andesite, Cascade Mts., Oregon. r53,204 (Bogue, I{odge). 627 Beny, L. G. Studies of mineral Annabergite. 804 sulpho-salts. IV. Galenobis- Antarctica. (Taylor) review] 625 [Book mudte and 'rlillianite.tt. tzo Apsouri, C. N... 203 204 Aramayoite, crystallography of . Bertrandite and beryl, new occur- (Berman, Wolfe) . r.).t rence at Cornwall. (Phe- Armstrong, L. C. Decomposition mister) . 379 and alteration of feldspars and spodumeneby water. 810 Bobierrite 806 Arsenopyrite, optical evidence of Bogue, R. and Hodge, E. T. Cas- twinning in. (Lukesh) 619 cade andesitesof Oregon. 627 Arsenopyrite, thermal decomposi- Bosazza,V. L. Notes on refractive tion of. (Lukesh). 539 index liquids. 299 Arsenrijsslerite. (Friedrich, Rob- Bowley, H JTJ itsch) . .. 313 Boxhole meteoritic iron, central Attapulgite, structural scheme of. Australia. (Madigan, Alder- @radley). .204,405 man) 154 829 830 INDEX Bradley, W'. F. Strucfural scheme ciple in minerals. (Friend, All- of attapulgite 204,405 chin). 378 Brandite. 750 Color blindness among students of Buddhue, J. D. Some constituents mineralogy. (Grawe) 302 of meteorite rusts . 435 Columbite... 59 Buddington, A. F Adirondack Columbite crystals, morphology of . igneous rocks and their meta- (Taylor). 123,214 morphism. [Book review] 305 Composite dike at Brockhill, Book review 90 Worcestershire. (Taylor) 378 Buerger, M. J. Memorial of Walde- Con{erence on applied nuclear mar Lindgren.. 184 physics 622 Buerger, N. W. 205 Connolly. J. P. Memorial of Wil- Bullard, F. M. Bartlett meteorite, liam A. Tarr... 189 Bell Co., Texas.. 205,497 Contact metamorphism of the (Philbrick) . Burfoot, J. D.Jr. 206 Katahdin granite. 2t2 at RYe Butler, J. W. Jr. Detrital dihexa- Contact metamorphism hedral quartz crystals in a sedi- Patch, Nevada. (Vitaliano). 215 men in Upper Magdalena Val- Cordierite, gem, from Great Slave ley, Colombia,S.A..... 145 Lake area, Canada. (Folins- bee) 216 Calcio-gadolinite. (Nakai) 312 Cordierite granite from TeriP Ca1lainite.... 723 Terip, Victoria. (Baker)... .) 4.J Carbonate-apatites. III. Carbonate- Correns, C. W. and Eskola, P. with apatite from Magnet Cove, Ar- Barth, T. F. W. Die Ensteh- kansas. (McConnell, Gruner) 157 ung der Gesteine. [Book re- Cascade andesites of Oregon. v iewl 308 @ogue, Hodge) 627 Corundum, mineral associations o[. Catalogue of meteorites, second ap- (Tomlinson).. Z IJ (Gruner). pendix. (Hey) [Book review] 768 Cristobalite in bentonite. 587 Ceramic clay in Hawaii. (Went- Cryphiolitc (analysis) ... 4t7 worth, W'ells, Allen). 1 Crystal chemistry of the Phos- phates, arsenates and vana- Cerite, radioactive, near James- town, Colo. (Goddard, Glass). 381 dates of the type A"XOI(Z). (Richmond) Chao,S. H.. ... 311 44r Crystal chemistry.(Stillwelt) Chkalovite. (Gerasimovsky) 380 [Book reviewl . 249 Chuquicamata copper mine. (Head) 377 Crystal habit and optics of NaF' spectrographic study of Cinnabar, LiF, NaCl, KCl, KBr and KI' (Dre1'g1). 207 effectof dyes on. (Frondel).. 9t Classification of elements, sulphides Crystal habit variation in NaF. and sulpho-salts. (Berman). 204 (Frondel). 338 Classification of minerals of the Crystallographiccalculations, notes type A (XOr)z.nII'O. (Wolf e) . 7 38,787 on.(Hey)...... 311 Clays, thin sections of. (Weather- Cuprobismutite, a mixture. (Pa- head).... 311 lache)... .211,611 Clinobarrandite and the isodi- CuzS-CuSsystem, x-ray investiga- morphous series variscite- tion of the solid phases of. metavariscite. (McConnell) .. 719 (Buerger).. 205 Collinsite (chemical and r-ray data) 746 Cuthbert, F. L. Petrography of two Colloidal gold as a colouring prin- Iowaloess materials. .....206, 519 INDEX 831 Dadson, A, S. with Peacock, M. Durrell, C. New data on the optical A. Rammelsbergite and para- propertiesof tridymite 501 rammelsbergite 561 Davies, G. M. with Evans, J. W. Efren.rov,N. E. 155,313 Elementary crystallographv. Eisenpickeringite. 254 [Bookrevierv]... 560 Elementary crystallography(Ev- Decomposition and alteration of ans, Davies)[Book review]. 560 feldspars and spodumene by Enstatite (chemical and optical W'ater.(Armstrong)... 810 data) .. 780 Deer, W. A. with Wager, L. R. Epidote, brown (optical data). 399 Petrography of the Skaer- Erythrite. 804 gaard intrusion of Kangerd- Eskola,P., with Barth, T. F. W. lugssuaq,E. Greenland.[Book and Correns,C.W. Die Ensteh- reviewl. .... .. 308 ung der Gesteine. [Book re- Deveilite.(Efremov). 155 viewl 308 de Villiers,J. E.. 379 Evans, J. W. and Davies, G. M. Diamond, variation in hardnessof . Elementary crystallography. (Kraus,Slau'son) .. 209 [Book review] 560 Dichroscope,simple. (Thibault) . 88 Exsolution growths of zincite in Die Enstehung der Gesteine. manganosite and of mangano- (Barth,Correns, Eskola) [Book site in periclase.(Frondel). .207, 534 revierl,'l. 308 Extinction atrgle, device for meas- Dihydite. (Ayres). 434 uring. (Inuzuka) 735 Dimler, R. J. and Stahmann, M. A. Mount for universal stage Fairfieldite (angle table and r-ray study of fragile minerals.. 502 data). 748 Dioptase, new occurrence in Ari- Falkmanite. (Ramdohr, Odman; zona. (Galbraith, Kuhn) 708 Lliller) .. 312 Discredited specics 626 Favalite (crystallographicdata) .. .554 Dittler, E.. 155 Feldspar replacing fossils. (String- Djalmaite. (Guimartens). 440 ham) 139 Doeglas, D. J., Reliable and rapid Feldspars, decomposition and al- rapid method for distinguish- teration of, by water. (Arm- ingqtartz and untwinned feld- strong)... .. 810 spar with the universal stage. 286 Feldspar, untwinned, method for Dolerophanite, crystallography of. distinguishing from qtartz. (Richmond,W'olfe) .. 212,606 (Doeglas) 286 Donnay, D. H.'Width J. of albite- Fleischer, M. and Ksanda, C. J. twinning lamellae. .. 578 Dehydration of pollucite. 666 206 Fluorite 400 Double variation method of refrac- Fluorite occurrence, West Cumber- tive index determination. I. land and Westmoreland. (Rus- Stage cell. II. Temperature sell) 3 11 control. (Vigfusson) 763 Fischcr, W. Mineralogie in Sachsen Drawings of crystals, accurate. von Agricola bis Werner. (Schaller). 214 fBookreview]... 379 Dreyer,R.M..... 207 Fisher, D. J. with Palache, C. Duftite (structural data). 458 Gratonite, a new mineral from Dunn, J. A.. 380 Cerro de Pasco, Peru 255 832 INDEX Discussion of "The formula Goldich,S. S. 213 of jordanite.". 297 Goldschmidtine identical with 207 stephanite.(Peacock). 372 Folinsbee,R. E.. 216 Gold-silver telluride minerals, re- Ford,'W'.E., memorialof. (Knopf). 174 lationship betweenthe crystal Foshag, VI. F. Shallowater mete- structureof. (Tunell).... 215 orite,anew aubrite......... 779 Gonyer, F. A. with Palache, C. Sodium bicarbonate from Microlite and stibiotantalite Searles Lake. Calif. 769 from Topsham,Maine.....-.. 4lI - Book review. 379 2rl Foster,W. R...... 207 Goodman,C...... 208 (optical Fosterite data)... .... 783 Granodioritesof Philadelphiaarea. Fragile materials, mount for uni- (Postil) 309 versal stagestudy of (Dimler, Gratonite, a new mineral from ..... 502 Stahmann)..... Cerro de Pasco, Peru. (Pal- 313 Friedrich,O. M.. ache, Fisher). 255 Friend, N.. 378 J. Gratonite, geologic occurrence of, Frondel, C. Crystal habit variation at Cerrode Pasco,Peru. (Rust) 266 inNaF.... 338 Grawe,O. R. Colorblindnessamong Effect of dyes on crystal studentsof mineralogy .. 302 habit and optics of NaF, LiF, handbookof NaCl, KCl, KBr and KI... .. 91 Grout, F. F. Kemp's . 767 Exsolution growths of zinc- rocks.[Book review]. .. ite in manganosite and of man- and Schwartz, G. M. Ge- ganositein periclase.... .207,534 ology of the anorthosites of Oriented inclusions of the Minnesota coast of Lake staurolite, zircon and garnet Superior.[Bookreview] .'. 90 in muscovite. Skating crystals Gruner, J. W. Cristobalite in ben- and their significance. 69 tonite. 587 .... ..207,208 with McConnell, D. Car- bonate-apatite from Magnet Galbraith,
Load more

Recommended publications
  • Bulletin of the Geological Society of America Vol. 56, Pp
    BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA VOL. 56, PP. 50S-SI4, 4 PUS., 3 FIGS. MAY 1945 SIMPSONITE AND THE NORTHERN BRAZILIAN PEGMATITE REGION BY FREDERICK H. POUGH CONTENTS Page Abstract 505 Introduction and acknowledgments 505 General description of the Alto do Giz 506 Mineralogy 508 Simpsonite 508 Microlite 511 Tantalite and its varieties 512 Bismutite and cyrtolite 513 Paragenesis 513 References cited 514 ILLUSTRATIONS Figure Page 1.—Typical tabular yellow-brown Alto do Giz simpsonite crystal 510 2.—Minute tabular, buff-colored simpsonite from Onca Mine 510 3.—Prismatic crystal fragment from Onca Mine 510 Plate Facing page 1.—Simpsonite Frontispiece 2.—Alto do Giz ! 506 3.—Kaolinite replacements 507 4.—Microlite and cyrtolite 510 ABSTRACT A study of the Alto do Giz, near Equador, Rio Grande do Norte, Brazil, reveals an interesting series of tantalum minerals including the rare aluminum tantalate, simpsonite. Crystals of this mineral are yellow brown, hexagonal in outline; c = .60978. It belongs to the hexagonal dipyramidal class Ceh. Hardness 7J, specific gravity is 6.81. It fluoresces blue to white in a cold quartz mercury vapor lamp with a filter. It is also found in white crystals at this mine and in buff-colored crystals at the Onca Mine, some miles away. It appears to be a replacement mineral of a short complex pegmatite sequence, crystallizing after microlite and tantalite. INTRODUCTION AND ACKNOWLEDGMENTS The extensive exploitation of the numerous pegmatite operations in northern Brazil is a relatively recent development, since the beginning of the war. In the years immediately preceding, when some nations foresaw a need for stockpiles of raw materials, there was a certain amount of beryl and tantalite production in the region, but the real impetus to the development of this desert area was supplied by the advent of the United States Purchasing Commission and their introduction of various 505 Downloaded from http://pubs.geoscienceworld.org/gsa/gsabulletin/article-pdf/56/5/505/3425995/i0016-7606-56-5-505.pdf by guest on 28 September 2021 506 F.
    [Show full text]
  • Cesstibtantite Cs(Sb3+
    3+ Cesstibtantite Cs(Sb , Na)Ta2(O, OH, F)7 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Cubic. Point Group: 4/m 32/m. As cubo-octahedral crystals; granular, to 3 mm. Physical Properties: Fracture: Uneven. Tenacity: Brittle. Hardness = ∼5 VHN = 670– 780 (100 g load). D(meas.) = 6.4–6.6 D(calc.) = 6.49 Fluoresces yellow-orange to orange under LW UV; weak yellowish cathodoluminescence. Optical Properties: Transparent; may be opaque except in thinnest fragments. Color: Colorless to gray, yellow-orange, black. Luster: Adamantine to vitreous. Optical Class: Isotropic. n = > 1.8 R: (480) 13.8, (551) 13.6, (589) 13.6, (656) 13.0 Cell Data: Space Group: Fd3m. a = 10.496–10.515 Z = 8 X-ray Powder Pattern: Kola Peninsula, Russia. 3.04 (10), 1.860 (10), 1.587 (10), 1.012 (10), 3.17 (9), 1.370 (9), 1.017 (9) Chemistry: (1) (2) (3) (1) (2) (3) Nb2O5 2.3 2.8 1.2 CaO 0.1 0.6 Ta2O5 72.0 70.8 72.5 Na2O 1.3 1.7 2.4 Bi2O3 0.7 0.3 0.6 K2O 0.0 0.05 Sb2O3 13.6 14.2 9.7 Cs2O 7.3 7.4 5.4 SnO 0.1 H2O [1.5] [1.2] PbO 1.6 0.8 5.3 Total 98.9 [99.5] [99.0] (1) Kola Peninsula, Russia; by electron microprobe, average of five analyses; (OH)1− confirmed by IR. (2) Do.; by electron microprobe, H2O calculated from structural considerations; corresponds to [Cs0.31(OH, F)0.69]Σ=1.00(Sb0.57Na0.31Pb0.02Bi0.01)Σ=0.91(Ta1.88Nb0.12)Σ=2.00 [O5.69(OH, F)0.31]Σ=6.00.
    [Show full text]
  • 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.
    [Show full text]
  • EGU2016-11594, 2016 EGU General Assembly 2016 © Author(S) 2016
    Geophysical Research Abstracts Vol. 18, EGU2016-11594, 2016 EGU General Assembly 2016 © Author(s) 2016. CC Attribution 3.0 License. Isotope age of the rare metal pegmatite formation in the Kolmozero-Voron’ya greenstone belt (Kola region of the Fennoscandian shield): U-Pb (TIMS) microlite and tourmaline dating Nikolay Kudryashov, Ludmila Lyalina, Artem Mokrushin, Dmitry Zozulya, Nikolay Groshev, Ekaterina Steshenko, and Evgeniy Kunakkuzin Geological Institute of the KSC RAS, Apatity, Russian Federation ([email protected]) The Kolmozero-Voron’yagreenstone belt is located in the central suture zone, which separates the Murmansk block from the Central-Kola and the Keivy blocks. The belt is represented by volcano-sedimentary rocks of Archaean age of 2.9-2.5 Ga. Rare metal pegmatites (Li, Cs with accessory Nb, Ta, and Be) occur among amphibolite and gabbroid intrusions in the northwestern and southeastern parts of the belt. According to the Rb-Sr data, the age of pegmatites was considered to be 2.7 Ga. Until recently there was no generally accepted point of view on the origin of pegmatites. Now we have isotopic data for a range of rock complexes that could pretend to be parental granites for the rare metal pegmatites. These are granodiorites with the zircon age of 2733±Ma, and microcline and tourmaline granites, which Pb-Pb isochronal age on tourmaline from the tourmaline granite located near the deposit is estimated to be 2520±70 Ma. The pegmatite field of the Vasin Myl’k deposit with the lepidolite–albite– microcline–spodumene–pollucite association is located among amphibolites in the northwestern part of the belt.
    [Show full text]
  • X-Ray Study of the Tantalum Mineral Simpsonite
    BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA VOL. 56, PP. 479-504, 4 PL.S., lf FIGS MAY 1945 X-RAY STUDY OF THE TANTALUM MINERAL SIMPSONITE BY PAUL F. KERR AND RALPH J. HOLMES CONTENTS Page Abstract ..... 479 Introduction. .................................... 480 Acknowledgments. ................. 485 Simpsonite from Tabba Tabba, Western Australia ............... 485 Simpsonite from Brazil. ....................... 489 Microlite from Brazil. 491 X-ray powder photographs ........................ 492 Bikita, Southern Rhodesia .......................... 496 Spectrographic data ................................ 498 Specific gravity .................................. 500 Hardness... ................................. 500 Fluorescence. ............................ 500 Laue x-ray photographs .................................. 501 Rotation photographs ............................ 501 Lattice constants...... ........................ 503 References cited .................................. 503 ILLUSTRATIONS Figure Page !.-Sketch map of simpsonite localities ................................................ 481 2.-Simpsonite crystal from Equador, Brazil.................... ..................... 490 3.-Stereographic projection of Taylor's Laue photograph. .................. 499 4.-Stereographic projection of a Laue photograph of simpsonite from Picuf, Brazil. 499· 5.-Alternative cell arrangements for simpsonite...... .................. 502 Plate Facing page 1.-Laue photographs of simpsonite from Western Australia ............................. 486- 2.-Laue
    [Show full text]
  • Geochemistry of Niobium and Tantalum
    Geochemistry of Niobium and Tantalum GEOLOGICAL SURVEY PROFESSIONAL PAPER 612 Geochemistry of Niobium and Tantalum By RAYMOND L. PARKER and MICHAEL FLEISCHER GEOLOGICAL SURVEY PROFESSIONAL PAPER 612 A review of the geochemistry of niobium and tantalum and a glossary of niobium and tantalum minerals UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1968 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director Library of Congress catalog-card No. GS 68-344 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price 50 cents (paper cover) CONTENTS Page Page Abstract_ _ __-_.. _____________________ 1 Geochemical behavior Continued Introduction. _________________________ 2 Magmatic rocks Continued General geochemical considerations. _____ 2 Volcanic rock series______--____---__.__-_-__ 2. Abundance of niobium and tantalum_____ 3 Sedimentary rocks______________________________ 2. Crustal abundance-________________ 3 Deposits of niobium and tantalum.___________________ 2£ Limitations of data________________ 3 Suggestions for future work__--___-_------__-___---_- 26 Abundance in rocks._______________ 5 References, exclusive of glossary______________________ 27 Qualifying statement.__________ 5 Glossary of niobium and tantalum minerals.___________ 3C Igneous rocks_________________ 6 Part I Classification of minerals of niobium and Sedimentary rocks.____________ 10 tantalum according to chemical types_________ 31 Abundance in meteorites and tektites. 12 Part II Niobium and tantalum minerals..-_______ 32 Isomorphous substitution.______________ 13 Part III Minerals reported to contain 1-5 percent Geochemical behavior._________________ 15 niobium and tantalum_______________________ 38 Magma tic rocks ___________________ 15 Part IV Minerals in which niobium and tantalum Granitic rocks_________________ 16 have been detected in quantities less than 1 Albitized and greisenized granitic rocks.
    [Show full text]
  • Amazonite: Mineralogy, Crystal Chemistry, and Typomorphism
    Amazonite: Mineralogy, Crystal Chemistry, and Typomorphism Mikhail Ostrooumov Institute of Earth Sciences, University of Michoacan of San Nicolas of Hidalgo, Morelia, Mexico AMSTERDAM • BOSTON • HEIDELBERG • LONDON • NEW YORK • OXFORD PARIS • SAN DIEGO • SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO Elsevier Radarweg 29, PO Box 211, 1000 AE Amsterdam, Netherlands The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, UK 225 Wyman Street, Waltham, MA 02451, USA Copyright © 2016 Elsevier Inc. All rights reserved. This English language edition is a translation of original Russian language edition titled Амазонский камень, ISBN 978-5-7325-0675-4 Copyright notice: © Издательство “Политехника“, 2008. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Details on how to seek permission, further information about the Publisher’s permissions policies and our arrangements with organizations such as the Copyright Clearance Center and the Copyright Licensing Agency, can be found at our website: www.elsevier.com/permissions. This book and the individual contributions contained in it are protected under copyright by the Publisher (other than as may be noted herein). Notices Knowledge and best practice in this field are constantly changing. As new research and experience broaden our understanding, changes in research methods, professional practices, or medical treatment may become necessary. Practitioners and researchers must always rely on their own experience and kno wledge in evaluating and using any information, methods, compounds, or experiments described herein. In using such information or methods they should be mindful of their own safety and the safety of others, including parties for whom they have a professional responsibility.
    [Show full text]
  • NEW MINERAL NAMES Falkmanite Paul Raulonn Ewn Or,On Onlrew
    NEW MINERAL NAMES Falkmanite Paul Raulonn ewn Or,on Onlrew: Falkmanit, ein neues Bleispiessglanzerz, und sein Vorkommen, besonders in Boliden und Grube Biiyerland N. Jahrb. Min, Beil-Bd.75, Abt. A (1939),315-350, 2 figs.,4pls. N,luB: In honor of Oscar Falkman, General director of the Bolidens Gruvaktiebolag. E C"uurcor Pnoprnrros: A sulfantimonide of lead, probably PbsSbzSe.Analysis (by Th. Berggren) [on sample contaminated with bournonite (10%), arsenopyrite (l-5%), jamesonite,covellite, etc, (3/)lPb 5297, Sb 22.48,Bi 116, Cu 1.52, S 19.32,Se 042, As 1 00, Fe 0 50, Ag 0.002, Au 0.001, Insol 0 56; total 99.93. Cnvsrallocnapurcar- Pnopnnrrns: Monoclinic. Habit tabular to (102) or acicular along b-axis,or i,vith lenticular cross section due to strong development of (101) and (102). Forms (001),(106), (102), (101), (302), (100). Psvsrcal Pnoprnrrns: Color, metallic gray-black toward lead gray. Streak black, when rubbed down light reddish to light brown. Cleavage (010), sometimes distinct, breaks to fine needleor fiber-like masses)along the 6-axis.Hd. 2+. G.6.24. MBtalr,ocneputcal Pnopnnrrls: Very similar to jamesonite and boulangerite. Cleavage distinct in sections nearly parallel to the b-axis, polish very good, color galena u'hite, anisotropism distinct. Deep red inner reflection. Etch: positive with HNOI, ef- fervescences with slow blackening. Negative with HCl, KCN, FeC[, HgClz, KOI].. Twinning rare. OccunnlNcn: Found as fibrous aggregates at Biiyerland Mine, Biiyerland, near Waldsassen, Upper Palatinate, Germany; with galena, jarnesonite, bournonite, geo- clonite, arsenopyrite, chalcopyrite, blende, pyrrhotite, pyrite, tetrahedrite, valleriite in a quartz gangue.
    [Show full text]
  • The Crystal Chemistry of Simpsonite
    663 Canadian Mineralogist Vol. 30, pp. 663-671 (1992) THE CRYSTAL CHEMISTRY OF SIMPSONITE T. SCOTT ERCIT1, PETRCERNY AND FRANK C. HAWTHORNE Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2 ABSTRACT The examination of simpsonite was prompted by a discrepancy between its apparently variable chemical composition and fairly uniform optical, physical and structural properties, as published in the literature. The present study of simpsonite from seven of its nine known localities confirms the formula A14 Ta3013(0H), with locally major substitution of Nb for Ta, and trace Fe, Ti, Sn for AI, Ta. The yellow to white color, white streak, blue-white cathodoluminescence in an electron beam and fluorescence under short-wave UV light are virtually uniform for all specimens. Optically uniaxial negative, simpsonite has a hardness of 7'h, an (w) in the range 2.025-2.040 (± Na liJ.!ht), and a density 3 0.005, in the range 6.68-6.82 g/cm ; a ranges from 7 .385(1) to 7.387(1), and c, from 4.515(1) to 4.516(1) A. The refinement of the crystal structure in space group P3 to R=5.30Jo, wR=6.90Jo established full order of AI and Ta and the geometry of individual octahedral sites, and identified the location of (OH) groups in a position extremely unfavorable for F substitution, in accord with the absence of fluorine in all reliably analyzed samples of the mineral. Keywords: simpsonite, tantalum, oxide mineral, crystal chemistry, mineral data, crystal structure. SOMMAIRE Nous avons entrepris une etude de Ia simpsonite a cause d'une inconsistance entre sa composition chimique, apparemment variable, et ses proprietes optiques, physiques et structurales, relativement uniformes d'apres Ia litterature.
    [Show full text]
  • Nb-Ta-(Ti-Sn) Oxide Mineral Chemistry As Tracer of Rare-Element Granitic Pegmatite Fractionation in the Borborema Province, Northeastern Brazil
    Originally published as: Beurlen, H., Da Silva, M. R. R., Thomas, R., Soares, D. R., Olivier, P. (2008): Nb-Ta-(Ti-Sn) oxide mineral chemistry as tracer of rare-element granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil. - Mineralium Deposita, 43, 2, 207-228, DOI: 10.1007/s00126-007-0152-4. Miner Deposita DOI 10.1007/s00126-007-0152-4 ARTICLE Nb–Ta–(Ti–Sn) oxide mineral chemistry as tracer of rare- element granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil Hartmut Beurlen & Marcelo R. R. Da Silva & Rainer Thomas & Dwight R. Soares & Patrick Olivier Received: 30 November 2005 /Accepted: 10 June 2007 # Springer-Verlag 2007 Abstract The Borborema Pegmatitic Province (BPP), effectiveness of Nb–Ta oxide chemistry as a possible northeastern Brazil, is historically important for tantalum exploration tool, to trace the degree of pegmatite fraction- mining and also famous for top-quality specimens of exotic ation and to classify the pegmatites. The columbite group Nb–Ta oxides and, more recently, for the production of gem mineral composition allows to establish a compositional quality, turquoise blue, ‘Paraíba Elbaite.’ With more than trend from manganoan ferrocolumbite to manganocolum- 750 registered mineralized rare-element granitic pegmatites, bite and on to manganotantalite. This trend is typical of the BPP extends over an area of about 75 by 150 km in the complex spodumene- and/or lepidolite-subtype pegmatites. eastern part of the Neoproterozoic Seridó Belt. The Late It clearly contrasts with another trend, from ferrocolumbite Cambrian pegmatites are mostly hosted by a sequence of through ferrotantalite to ferrowodginite and ferrotapiolite Neoproterozoic cordierite–sillimanite biotite schists of the compositions, typical of pegmatites of the beryl–columbite Seridó Formation and quartzites and metaconglomerates of phosphate subtype.
    [Show full text]
  • Simpsonite Al4(Ta, Nb)3O13(OH) C 2001-2005 Mineral Data Publishing, Version 1
    Simpsonite Al4(Ta, Nb)3O13(OH) c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Hexagonal. Point Group: 3. Euhedral to subhedral crystals, tabular to short prismatic, with {1010} and {0001}, and rarely a few other forms, striated k [0001], to 2.4 cm; commonly in subparallel groups. Physical Properties: Fracture: Conchoidal. Hardness = 7.5 D(meas.) = 6.68–6.82 D(calc.) = [6.82–6.86] Blue-white cathodoluminescence and fluorescence in SW UV, rarely fluoresces yellow. Optical Properties: Semitransparent. Color: White to cream, yellow to yellow-brown when altered; colorless in transmitted light. Streak: White. Luster: Adamantine. Optical Class: Uniaxial (–). ω = 2.045(5) = 2.025(5) Cell Data: Space Group: P 3. a = 7.385–7.387 c = 4.515–4.516 Z = 1 X-ray Powder Pattern: Alto do Giz pegmatite, Brazil. 1.651 (100), 2.859 (67), 3.69 (62), 2.131 (59), 1.395 (54), 2.417 (40), 2.609 (37) Chemistry: (1) (2) (3) Nb2O5 1.82 0.0 8.6 Ta2O5 71.54 76.4 64.6 SiO2 1.00 TiO2 0.02 0.0 0.0 SnO2 0.10 0.0 0.9 Al2O3 25.20 22.8 24.3 FeO 0.16 CaO 0.12 H2O 1.0 1.1 Total 99.96 100.2 99.5 (1) Alto do Giz pegmatite, Brazil. (2) Do.; by electron microprobe, H2O calculated for O:OH = 13:1; corresponding to Al3.93Ta3.04O13(OH). (3) Mumba, Congo; by electron microprobe, H2O calculated for O:OH = 13:1, corresponding to Al3.97Sn0.05(Ta2.44Nb0.54)Σ=2.98O13(OH).
    [Show full text]
  • New Mineral Names*
    American Mineralogist, Volume 67, pages 413418, 19E2 NEW MINERAL NAMES* Mrcnenr- Frelscnnn, Rocen G. BunNs, Lours J. Cnnnr, Cenr A. FnaNcrs, AND ADoLF pnnsr Alumotantite*, Natrotantite* Electron microprobe analysisgave GeO253.7, PbO 34.0, FeO 12.f A. V. Voloshin, Yu. P. Men'shikov, and ya. A. pakhomovskii , sum 9.8Vo, conesponding to Pb6.e7Fefi!eG%62Os.The infra-red spectrum showed (1981)Alumotantite and natrotantite, new tantalum mineralsin the absence of water, and micro- chemical tests showed granitic pegmatites. Zapiski Vses. Mineralog. Obshch., ll0, the iron to be ferrous. Dissolved bv hot 338-345 (in Russian). HCl. X-ray data showed the rnineral to be monoclinic, spacegroup Both minerals occur in albitized areas of granite pegmatites, = I"21orY21lm, a 5.431,b : 13.689,c : 5.892A,B: llt.7g",Z Kola Peninsula, USSR. Alumotantite forms rims around crystals : 2, D calc. = 4.97. The_strongest X-ray liles (40 given) are of simpsonite and also rims natrotantite. The latter occurs 4.74(6Xll0), 4.42(8)(llJ)_: 2.el(10)(041,041),2.87 (E)(tzr), intergrown with microlite and rims simpsonite. 2.7s (7) (r4 r,M2), 2.20(7)(222,230) . Microprobe gl.l3, analysis of alumotantite gave Ta2O5 The mineral occurs in cavities in primary ore containing Nbzq 0.80, 1'l.2O3 1E.47,sum 100.40%,corresponding to Al- germanite, renierite, tennantite, and galena. One crystal is q.e6Tao.eeNbs.62Oa,or AlTaOo. X-ray study showed it to be tabular on {10T}, the other acicular on {l0l}. Other forms orthorhombic,a:4.x) + + = + 0.01,D: ll.5g 0.02,c 5.66 observedare {lll} and {010}.Max.
    [Show full text]