 | | Journal (article/letter/editorial) | | Vol. 64, 1969, pp. 910-914 Merumite Occurrencein Guyana CHARLES MILTON and SAT NARAIN Abstract Merumite...associateddiamondsand gold in 1937 in gravels of the Merume River in Guyana. It was describedas essentiallya hydrouschromium...been observed in the ridge or anywhere in the region,otherthan the merumitein the placergravel. Merumitecommonly...Manymerumite grainshaveimpressions, andsomecontaincrystals, of doublyterminated "needle"quartz. Water-worngorceixite...Locationand •tccessibility.--Merumite,a complex mixture of many unusualchromiumminerals,is foundas blackpebblesand |  | Milton, Charles, Appleman, D.E., Appleman, M.H., Chao, E.C., Cuttitta, Frank, Dinnin, J.I., Dwornik, E.J., Ingram, B.L., Rose, H.J. (1976) Merumite; a complex assemblage of chromium minerals from Guyana. Professional Paper 887. US Geological Survey doi:10.3133/pp887 | Report (issue) | | Merumite A Complex Assemblage of Chromium Minerals from Guyana GEOLOGICAL SURVEY PROFESSIONAL PAPER 887...Geological Survey of Guyana MERUMITE A COMPLEX ASSEMBLAGE OF CHROMIUM MINERALS FROM GUYANA r 0 1 mm ...mm Photomicrographs of four merumite thin sections illustrating the diversity of mineral composition...composition and structure and the fineness of grain size. Plain transmitted light. UPPER LEFT: Green eskolaite and...red-brown guyanaite. UPPER RIGHT: Banded structure of green eskolaite and yellow to brown guyanaite. The |  | | Report (issue) | | probably variable with particle size and degree of oxidation; gray with greenish tint in reflected light... c = 2.951–2.958 X-ray Powder Pattern: Merume River, Guyana. 3.224 (vvs), 2.432 (vs), 1.636 (s), 1.719...10.60 Total [96.3] [100.00] 100.00 (1) Merume River, Guyana; H2 O calculated from stoichiometry, original...oxidation of Cr with loss of H1+ . (2) Outokumpu, Finland; by electron microprobe, average of seven analyses;...CrO(OH). Polymorphism & Series: Trimorphous with bracewellite and grimaldiite. Occurrence: In fine-grained |  | | Report (issue) | | = 13.392(1) Z=3 X-ray Powder Pattern: Merume River, Guyana. 4.47 (vvs), 2.401 (vs), 1.857 (vs), 1.486...60 11.5 Total 99.87 100.00 (1) Merume River, Guyana; intergrowth of 80%–86% estimated grimaldiite, the...CrO(OH). Polymorphism & Series: Trimorphous with bracewellite and guyanaite. Occurrence: In fine-grained...oxide-hydroxide minerals in alluvial gravels (Merume River, Guyana); in cracks and crevices in penroseite from...Bolivia). Association: Bracewellite, eskolaite, guyanaite, mcconnellite (Merume River, Guyana); penroseite, barite |  | | Report (issue) | | rhombohedral crystals, to 1 mm; as granular aggregates of intergrown crystals. Physical Properties: D(calc...= 17.160(31) Z=1 X-ray Powder Pattern: Merume River, Guyana; from a mixture with grimaldiite. 2.85 (ms)...51 48.49 11.5 99.9 100.00 (1) Merume River, Guyana; integrowth of 80%–86% grimaldiite, the balance...Association: Bracewellite, eskolaite, grimaldiite, guyanaite. Distribution: In the basin of the Merume...River, Guyana. Name: Survey. For Dr. Richard Bradford McConnell, formerly Director, British Guyana Geological |  | | Report (issue) | | Cr3+ O(OH) Bracewellite c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic....c = 2.974(2) Z=4 X-ray Powder Pattern: Merume River, Guyana. 4.065 (vvs), 2.648 (vs), 2.404 (vs), 2...Total 99.6 (2) 89.40 10.60 100.00 (1) Merume River, Guyana; estimated to contain 30% eskolaite. (2)...basin of the Merume River, Guyana. Name: For Smith Bracewell, formerly Director, British Guyana Geological...(1976) Merumite, a complex assemblage of chromium minerals from Guyana. U.S. Geol. Surv. Prof. Paper 887 |  | | Report (issue) | | As hexagonal prisms, to 12 mm, showing Hardness = 8 VHN = 3200 D(meas.) = 5.18 D(calc.) = 5.20 Optical...Upper, Ireland); as pebbles in streams (Merume River, Guyana); a very rare component in chondrite meteorites...guyanaite, bracewellite, grimaldiite, mcconnellite, chromian gahnite, pyrophyllite, quartz (Merume River, Guyana)...Mountains, and on the western shore of Lake Baikal, 4.5 km south of Olkhon Gate Strait, Siberia. Found...Bahia, Brazil. Along the Merume River and its tributaries, Mazaruni district, Guyana. Name: Honors Professor |  | Shpachenko, A. K., Sorokhtina, N. V., Chukanov, N. V., Gorshkov, A. N., Sivtsov, A. V. (2006) Genesis and compositional characteristics of natural γ-CrOOH. Geochemistry International, 44 (7) 681-689 doi:10.1134/s0016702906070056 | Journal (article/letter/editorial) | | 739–748. Genesis and Compositional Characteristics of Natural g-CrOOH A. K. Shpachenkoa, N. V. Sorokhtinab...Academy of Sciences, ul. Fersmana 14, Apatity, Murmansk oblast, 184200 Russia bVernadsky Institute of Geochemistry...Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991 Russia cInstitute of Problems of Chemical Physics...Academy of Sciences, Chernogolovka, Moscow oblast, 142432 Russia dInstitute of the Geology of Ore Deposits...Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 109017 Russia |  | | Journal (article/letter/editorial) | | 558 SHORT C O M M U N I C A T I O N S System of Mineralogy, 1. John Wiley and Sons, New York and London...Mineral. 35, 488 99. - - ( 1 9 5 5 ) Acta Crystallogr. 8, 165 72. [Manuscript received 28 June 1983] Copyright...Lindsley, 1981) has been reported as a minor constituent of some metamorphosed manganese deposits (Lee, 1955;...there is, as yet, no record of crystallographically oriented intergrowth of pyrophanite and hematite. This...relationship and chemistry of pyrophanite and hematite forming such intergrowths in gondites of Chikla area (Maharashtra |  | | Journal (article/letter/editorial) | | pages 1277–1283, 2014 Chemistry and Mineralogy of Earth’s Mantle Mantle-derived guyanaite in a Cr-omphacitite...Department of Earth Sciences and Department of Chemical and Physical Sciences, University of Toronto, Mississauga...Department of Earth Sciences, Western University, London, Ontario N6A 5B7, Canada 3 Department of Geological...xenolith of Cr-rich omphacitite from the Moses Rock diatreme in the Navajo Volcanic Field of the southwestern...It occurs as the dominant phase in small clusters of accessory minerals, intergrown with kosmochlor-rich |  | Clark, A. M., Smith, D. A., Symes, R. F., Tandy, P. C., Hart, A. D. (1995) Catalogue of Type Mineral Specimens in the Natural History Museum, London - With an appendix listing mineral species and varieties originally described from the British Isles. Natural History Museum, London. | Book | | Catalogue of Type Mineral Specimens in The Natural History Museum, London, with an appendix listing mineral...THE _, NATURAL HISTORY MUSEUM • Ill Catalogue of Type Mineral Specimens in The Natural History Museum...Dunn and J.A. Mandarino (1988) Formal definitions of type mineral specimens. Mineralogical Magazine, 52...102-104. 2 Introduction This publication is a list of the mineral specimens in the Natural History Museum...designation according to the approved definitions of the Commission on New Minerals and Mineral Names |  | Livingstone, A., Jackson, B., Davidson, P. J. (1984) Grimaldiite, CrOOH, a second occurrence, from the Hiaca Mine, Colquechaca, Bolivia. Mineralogical Magazine, 48 (349) 560-562 doi:10.1180/minmag.1984.048.349.16 | Journal (article/letter/editorial) | | the mineral assemblage of most of the deposits. In the gondite, the assemblage of braunite, jacobsite,... and hematite, in the complete absence of magnetite, was obviously stabilized above the F e 2 0 3 - F...appearance ofilmenite, the generally common associate of hematite in metamorphosed rocks, was therefore inhibited...University, Calcutta, and by Prof. F. Hirowatari of Kyushu University, Japan, are gratefully acknowledged...Syngenetic Manganese Formations of India. Jadavpur University, Calcutta. - - ( 1 9 8 1 ) Manganese Deposits. |  | | Journal (article/letter/editorial) | | 1146 Twenty-fifth list of new mineral names By M. H. HEY, M.A., D.Sc. Department of Mineralogy, British...variants, including alternative transliterations of Russian names; there is one named mixture and 9 synonyms...nature, and 71 new named species or varieties worthy of distinctive names. As in the 24th list, many minor...and no attempt has been made to trace the origin of spelling variants. I. Kostov ('Mineralogy', Oliver...includes the following minerals prior to publication of their descriptions by their authors: argentomelane |  | Jahn, Sandro, Wunder, Bernd, Koch-Müller, Monika, Tarrieu, Leïla, Pöhle, Michael, Watenphul, Anke, Taran, Michael N. (2012) Pressure-induced hydrogen bond symmetrisation in guyanaite, β-CrOOH: evidence from spectroscopy and ab initio simulations. European Journal of Mineralogy, 24 (5) 839-850 doi:10.1127/0935-1221/2012/0024-2228 | Journal (article/letter/editorial) | | 4 Institute of Geochemistry, Mineralogy and Ore Formation, National Academy of Science of Ukraine, Palladin...Abstract: Guyanaite, b-CrOOH, is a structural analogue of the high-pressure oxyhydroxide phases d-AlOOH and...spectroscopy. In addition, the structural evolution of b-CrOOH and b-CrOOD with increasing pressure up to...by first-principles calculations in the framework of the density-functional theory (DFT). A pronounced...isotope effect and very short O-H. . .O bond lengths of 2.497(3) Å for b-CrOOH and 2.541(3) Å for b-CrOOD |  | Liu, Chao, Hystad, Grethe, Golden, Joshua J., Hummer, Daniel R., Downs, Robert T., Morrison, Shaunna M., Ralph, Jolyon P., Hazen, Robert M. (2017) Chromium mineral ecology. American Mineralogist, 102 (3) 612-619 doi:10.2138/am-2017-5900 | Journal (article/letter/editorial) | | Road NW, Washington, D.C. 20015, U.S.A. Department of Mathematics, Computer Science, and Statistics, Purdue...Indiana 46323, U.S.A. 3 Department of Geosciences, University of Arizona, 1040 East 4th Street, Tucson...Tucson, Arizona 85721-0077, U.S.A. 4 Department of Geology, Southern Illinois University, Carbondale, Illinois...terrestrial Cr mineral species (http://rruff.info/ima, as of 15 April 2016), representing 4089 mineral species-locality...species-locality pairs (http://mindat.org and other sources, as of 15 April 2016). We find that Cr-containing mineral |  | | Journal (article/letter/editorial) | | N DA D o L F p A B s r Argentocuproaurite Bracewellite,* grimaldiite,* guyanaite,+ mcconnellite* L...Minerals-natural alloysof gold and copperin ores of copper-nickel deposits of Noril's. Trudy Mineral. Muzeya Akad...x a s s e m b l a g eo f chromium minerals from Guyana. U. S. Geol. Suns. Prof. Pap., 887. l-29. M i...u 6 7 . 7 , 6 6 . 5 :C u 9 . 2 , t 1 . 2 ;A g 1 2 8 , 1 9 . 4 ; p d 4 . 2 " 2 2 : R h 4 . 3 , - ; P b...d . . T h e X - r a y p o w d e r p a t t e r n ( 8 l i n e s ) w a s i n d e x e da s p r i m i t i v |  | | Book (edition) | | 2008 Elsevier B.V. All rights reserved. No part of this publication may be reproduced or transmitted...methods they should be mindful of their own safety and the safety of others, including parties for whom...professional responsibility. To the fullest extent of the law, neither the Publisher nor the authors, contributors...as a matter of products liability, negligence or otherwise, or from any use or operation of any methods...book is available from the British Library Library of Congress Cataloging-in-Publication Data A catalog |  | | Book | | Library of Congress Catalog Card Number 90-21739 ISBN 0-442-00344-7 All rights reserved. No part of this...—without written permission of the publisher. Printed in the United States of America. Van Nostrand Reinhold...MIK 5G4, Canada 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Library of Congress Cataloging-in-Publication Data... Introduction This manual represents an alphabetical listing of all valid mineral species and includes the name,...classification, a reference to the origin of the name, an indication of related species, and selected literature |  | | Book (volume) | | Mineralogy Nikita V. Chukanov Infrared spectra of mineral species Extended library Volume 1 Springer...Infrared spectra of mineral species Extended library Nikita V. Chukanov Russian Academy of Sciences Institute...Institute of Problems of Chemical Physics Chernogolovka, Russia ISSN 2194-3176 ISSN 2194-3184 (electronic)...Springer Dordrecht Heidelberg New York London Library of Congress Control Number: 2013955742 # Springer Science+Business...part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations |  | | Book | | ncyclopedia of Mineral William H. Blackburn William H. Dennen | The Canadian Mineralogist Special Publication... Poicletake of Mineral Names Pee pedia of Mineral Names William H. Blackburn Professor of Geology University...University of Windsor William H. Dennen Emeritus Professor of Geology University of Kentucky Featuring...Featuring the artwork of Peter I. Russell Earth Sciences Museum University of Waterloo The Canadian Mineralogist...Mineralogist Special Publication Mineralogical Association of Canada Association minéraiogique du Canada 1 Credits |  | | Book (edition) | | !f Mineral Species 2008 FLEISCHER'S GLOSSARY OF MINERAL SPECIES 2008 Michael Fleischer 1908-1998...Tucson This is an alphabeticallist, as of December I, 2007. of the names, symmetry. and chemical compositionsof...writc thc prcfacc to thc I 0th edition of The Fleischer s Glossary of Mineral Species, I do so with somc...including the International Encyclopedia of Minerals and the next edition of the Glossary, Joe asked me if I would...would be willing to take on the responsibility of the Glossary for him. He wanted to spend as much time |  | | Book | | ewminerOOOOunse A Manual of New Mineral Names 1892-1978 A Manual of New Mineral Names 1892-1978...(Natural History) Oxford University Press © Trustees of the British Museum (Natural History) 1980 All rights...Library Cataloguing in Publication Data A manual of new mineral names, 1892-1978. 1. Mineralogy - Terminology...(Natural History) 549203 QE357 ISBN0-19-858501-2 Library of Congress Catalog Card Number 80-40204 First published... A Manual of New Mineral Names 1892-1978 Editors’ Foreword This work is a collected edition of the thirty |  | | Book (edition) | | N I M _ _ Second Edition | w Bee Encyclopedia of minerais / =Roberts, Willard — 210906 REF 549.03...Photo sie Wendell E.se ee ee ee eee ENCYCLOPEDIA OF MINERALS Second Edition Willard L. Roberts, Thomas...gemologists have come to rely on the Encyclopedia of Minerals as the definitive reference work on every...species. However, the amount of information generated in the science of mineralogy has increased tremendously...with a wealth of new information and features. The second edition of the Encyclopedia of Minerals contains: | | | Book (edition) | | Encyclopedia of 1inerals / Roberts, Willard Lincoln. 210906 REF 549.03 ENCYCLOPEDIA OF MINERALS Second...gemologists have come to rely on the Encyclopedia of Minerals as the definitive reference work on every...species. However, the amount of information generated in the science of mineralogy has increased tremendously...with a wealth of new information and features. The second edition of the Encyclopedia of Minerals contains:...alphabetical entries, 1000 of which are entirely new • 240 new color photographs, mostly of large specimens, as |  | | Book | | L1608_fm Page 4 Monday, July 16, 2007 2:40 PM Library of Congress Cataloging-in-Publication Data Chromium(VI)...permission, and sources are indicated. A wide variety of references are listed. Reasonable efforts have been...responsibility for the validity of all materials or for the consequences of their use. Neither this book...or personal use, or the personal or internal use of specific clients, may be granted by CRC Press provided...Drive, Danvers, MA 01923 USA. The fee code for users of the Transactional Reporting Service is ISBN 1-56670-608-4/05/$0 |
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Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana