 | | Report (volume) | | Talc Resources of the United States GEOLOGICAL SURVEY BULLETIN 1167 Talc Resources of the United...Survey. Bulletin 1167) Bibliography: p. 58-61. 1. Talc U.S. I. Engel, Albert Edward John, 1916thor. II...__-_---_---_----_ Classification and geology of talc deposits_______-_--___--__-_____-Deposits associated...associated with mafic igneous rocks._____-_.---_-_---_-.Talc deposits in the United States.-____________________--_--_--_...rock__________________--__-___-_--_ Silver Lake-Yucca Grove district..______________________ Southern Death Valley-Kingston |  | | Journal (article/letter/editorial) | | stability of sol-gel prepared fluoride-substituted talc Received November 29, 1994 / Revised, accepted...resulting products were high-purity, single-phase talcs with fluoride substitution as high as 75 mole percent;...is attributed to a decrease in the b-dimension of talc when fluoride replaced hydroxide. FTIR spectroscopy...decrease in Vo_~ in talc with increasing fluoride substitution, which was attributed to an increase in hydrogen...the OH groups and an increase in the electronegativity of the octahedral layer in talc with increasing |  | Nkoumbou, C., Villieras, F., Barres, O., Bihannic, I., Pelletier, M., Razafitianamaharavo, A., Metang, V., Yonta Ngoune, C., Njopwouo, D., Yvon, J. (2008) Physicochemical properties of talc ore from Pout-Kelle and Memel deposits (central Cameroon) Clay Minerals, 43 (2) 317-337 doi:10.1180/claymin.2008.043.2.11 | Journal (article/letter/editorial) | | (2008) 43, 317–337 Physicochemical properties of talc ore from Pout-Kelle and Memel deposits (central...Physicochemical properties of representative samples from talc deposits discovered at Pout-Kelle and Memel in Cameroon...morphometric characteristics. As a result, we found that talc (platy or round, Fe-rich) prevails (6590%) over...chromite, rutile, brucite and magnesite. Chemically, talc ores are made up of SiO2, MgO, Fe2O3 and minor Al2O3...crystallinity and platiness. Potential uses of these talc ores in the rubber, plastics and paper industries |  | | Report (issue) | | Ministry of Northern Development and Mines (MNDM) as a public service, on an “as-is” basis. Recommendations...par le ministère du Développement du Nord et des Mines (MDNM) de la province de l'Ontario. Les recommandations...Copyright@gov.on.ca ONTARIO DEPARTMENT OF MINES AND NORTHERN AFFAIRS TALC IN ONTARIO By D. F. Hewitt INDUSTRIAL...1972 Publications of the Ontario Department of Mines and Northern Affairs, and price list are obtainable...the Publications Office, Ontario Department of Mines and Northern Affairs, Parliament Buildings, Queen's |  | | Journal (article/letter/editorial) | | Printed in Great Britain THE CRYSTAL STRUCTURE OF TALC J. H. RAYNER and G. BROWN Pedology Department, Rothamsted... Abstract- The crystal structure of a sample of talc from Harford County, Maryland, has been determined...which have formed by alteration of minerals with an existing layer silicate structure. As part of our...ofthese minerals we have re-examined the structure of talc. The structures of the layer silicates were outlined...a greater separation of the octahedral cations. Talc is the simplest of the layer silicate structures |  | | Journal (article/letter/editorial) | | Depolymerized Pyribole Structures Derived from Talc by Heating Hiromi Konishi 1 and Junji Akai z 1...February 5, 1990 Abstract. Talc specimens heated to 700-1450~ C were examined with an analytical high-resolution...structures associated with the depolymerization of talc was the basis of a structural model proposed for...(010) faults with a displacement of 1/2 (a + e) took an important role. The acceptor and donor regions model...suggested that the MPP structure could be formed by an alternation of pyroxene of uralite or smaragdite |  | | Journal (issue) | | mineral localities: The Bastnas Mines, Riddarhyttan Ore Field, Bergslagen District, Vastmanland, Sweden ......crystal, 2 mm-All from the Trimouns talc quarry near Luzenac, France (see the article beginning on page 225)...BASTDAS ffiIDES RIDDARHYTTAD ORE FIELD, BERGSLAGED DISTRICT, VASTffiADLADD, SillEDED Lennart Ohman Hi:igviltsvagen...south-central Sweden, where tens of thousands of different mines have been worked for nearly a thousand years. Iron...fields, with approximately 300 large and small mines. Iron ore mining began in the mid-14th century, |  | | Journal (article/letter/editorial) | | Petrographic, Universit/it innsbruck, A-6020, Austria Received November 28, 1989 / Accepted April 30...the subsolidus region, the reaction muscovitess + talc~ + tremolite~s -- phlogopitess + zoisite + quartz...around 21 kbar/755 ~ C. Muscovite + tremolite + talc or kyanite comes in at higher pressures. These phase...young alpidic event. In restricted areas relics of an earlier subduction zone related metamorphism with...kyanite; Qz, quartz; Tr, tremolite; Ta, talc; Kf K-feldspar; An, anorthite 394 Table 1. Unit cell dimensions |  | | Journal (article/letter/editorial) | | MAY_JUNE' 1968 TRICLINIC TALC AND ASSOCIATED AMPHIBOLES FROM GOUVERNEUR MINING DISTRICT, NEW YORK1 Marcolu...given for talc, tremolite, and a manganoan amphibole (tirodite) from the Gouverneur mining district, New York...York. All talc examined is g:98o55', z:90o0', space found to be triclinic, o:5.25s,b:9.132, c:9.MsA,a:9O"46'...(1Tc). Chemical analysis gives the composition of talc from the Arnold pit as MgaorSi:goOroForo(OH)reo...fluorine analyses ol 22 talcs from worldwide localities it is observed that talc derived from metamorphosed |  | | Journal (article/letter/editorial) | | contact zone of the Trimouns talc/chlorite deposit, where large-scale mining for talc may now be approaching...approaching its end. INTRODUCTION The Trimouns talc-chlorite deposit is a mineral locality of international significance...of Andorra, and 115 km from Toulouse. It lies at an altitude of 1800 meters on the west slope of the...above it. Because of the heavy winter snowfalls, talc is quarried for only 6 months of the year, from...1905 the quarry was acquired by the Société des Talcs de Luzenac (Mengaud, 1909); in 1988 it was purchased |  | | Journal (article/letter/editorial) | | have been found, cherokee county, Georgia, and von der Rossa, val Devero, rtaly. The Swiss so-called "hydroxylapatite"...interpreted. when sufficient hydroxyl is present in an apatite, it is reflected in the increase in refractive...Lrrcnarunp aNo NouTNCLATURE In 1856,A. A. Damourl analyzed an apatite from the vicinity of St. Girons in the Pyrenees...I'hydro-apatite, (18s6). espdce min6ral; Annal,es des mines, lO, 65-68 2 Schaller, W. T., Mineralogical Notes-series...dipyramidal class. The etch grooves on the base form an hexagonal pattern, the principal system of grooves |  | | Journal (article/letter/editorial) | | - WmOH, with X being the anharmonicity constant. Talc samples with various crystal chemistries are used...samples. Therefore the relation, established from talc samples because their absorption bands are narrow...and Pollard 1973). Chemical analyses are based on an average of at least several hundred millions of unit...effective detection of (1) isomorphous substitutions in talcs (less than 0.01 atom of Fe2+ or Al per half unit...and 2mOH wavenumbers, the selected samples are talcs because their absorption bands are narrow, with |  | | Report (issue) | | location of the Balmat-Edwards (Gouverneur) mining district in the northwestern Adirondack Mountains, New...quartz-biotite-oligoclase gneiss. For specific modal values see Engel and Engel 1953b 6. Possible longitudinal profiles...profiles of several major folds in the district. These profiles are drawn along the axial planes of the...development of structural features in the Balmat-Edwards district Illustrations (long list) Cont'd. Figures Page...sketch of the Edwards refold in the median gneiss and an enlargement of a component part showing the more |  | | Book (edition) | | barite for oil-well drilling mutls, the ii.se of talc in ceramics, and the large-scale use of hddspar...areas of the country, such as the Gulf Coast, Calif., an...and toehniques for examining and (c.sting minerals an...coauthor to collaborate in its preparation and to assume an important share of the burden. W, M. Myers is a former...former colleague, a friend of long standing, and an associate in various nonmetallic mineral activities |  | Blanchard, Marc, Méheut, Merlin, Delon, Louise, Poirier, Mathilde, Micoud, Pierre, Le Roux, Christophe, Martin, François (2018) Infrared spectroscopic study of the synthetic Mg–Ni talc series. Physics and Chemistry of Minerals, 45 (9) 843-854 doi:10.1007/s00269-018-0966-x | Journal (article/letter/editorial) | | Infrared spectroscopic study of the synthetic Mg–Ni talc series Marc Blanchard1 François Martin1 · Merlin...Germany, part of Springer Nature 2018 Abstract Five talc samples [(Mg,Ni)3Si4O10(OH)2] covering the entire...et composition, 2013b), which produces sub-micron talc particles replying to industrial needs. Near- and...coefficients provide a firm basis for quantifying the talc chemical composition from infrared spectroscopy...confirm that these synthetic talc samples have a similar structure as natural talc, with a random distribution |  | | Journal (article/letter/editorial) | | collection of Thomas Pennant (1726-1798).1 By W. (~AM~B~LL SMITH, M.A., F.G.S. Assistant in the Mineral...mineralogists has been his account of the mineral district of Flintshire, an account which appeared in ' A Tour in...the Geological Survey memoir dealing with that district 2 Though Pennant himself has told us very little...Flintshire shows that he had accurate information of the mines of that area and of the minerals which they produced...in 1793, he tells us that in 1746 or 1747, while an undergraduate at Queen's College, Oxford, he made |  | | Journal (article/letter/editorial) | | 443-52 The nature of kerolite, its relation to talc and stevensite G. w. BRINDLEY, DAVID L. BIStt, AND...Carolina), and Kremze (Czechoslovakia) are compared with talc and stevensite. Chemical analyses give a composition...differ from stevensite. Kerolites come close to talc in structure and composition but differ in having...considered to be a useful varietal name for this talc-like mineral in agreement with the views of D'yakonov...become discredited owing to difficulties in obtaining an adequate definition and significant chemical formula; |  | | Journal (article/letter/editorial) | | Significance of ultrahigh-P talc-bearing eclogitic assemblages J. G. Lioo AND R. Y. ZHANG Department...University, Stanford, CA 94305, USA Abstract Talc was identified as an equilibrium associate of omphacite, kyanite...ultrahigh-P metamorphic terrane, central China. Observed talc- and tremolite-bearing assemblages within the coexisting...reported talc occurrences from the Dora Maira massif, leads to the conclusion that UHP talc assemblages...ultrahigh pressures in ultramafic rocks. Thus, talc cannot be an important H20-bearing phase in deep mantle |  | | Journal (article/letter/editorial) | | NationalMuseum,.tmn Chemistry The chemical constitution of talc is a problem that has engaged the attention of a...Trrponrrrcar HzO:MgO:SiOz: HrO Mgo sio, CouposrrroNs oF Talcs l:3:4 2:4:5 336 635 47 31 8 635 7.2 32.3 605...been assigned the name "gavite."2 Two occurrencesof talc of low silica and high water content have been studied... 1 9 1 9 . 167 THE AM ERICAN M I N ERA LOGIST 168 Some specimens of talc collected by Mr. Earl V...in Russell, Massachusetts were investigated. The talc occurs as patches of silvery flakes of a light green | | | Journal (article/letter/editorial) | | collection of Thomas Pennant (1726-1798). 1 By W. (~AM~B~LLSMITH, M.A., F.G.S. Assistant in the Mineral...mineralogists has been his account of the mineral district of Flintshire, an account which appeared i n ' A Tour in...Flintshire shows that he had accurate information of the mines of that area and of the minerals which they produced...in 1793, he tells us that in 1746 or 1747, while an undergraduate at Queen's College, Oxford, he made...1793 Pennant felt that his literary career was at an end, he enjoyed five more years of a vigorous life |  | Dumas, Angela, Martin, François, Le Roux, Christophe, Micoud, Pierre, Petit, Sabine, Ferrage, Eric, Brendlé, Jocelyne, Grauby, Olivier, Greenhill-Hooper, Mike (2013) Phyllosilicates synthesis: a way of accessing edges contributions in NMR and FTIR spectroscopies. Example of synthetic talc. Physics and Chemistry of Minerals, 40 (4) 361-373 doi:10.1007/s00269-013-0577-5 | Journal (article/letter/editorial) | | NMR and FTIR spectroscopies. Example of synthetic talc Angela Dumas • François Martin • Christophe Le... Abstract A series of new-generation synthetic talcs were prepared by varying the hydrothermal synthesis...resonance. The new process for preparing synthetic talcs allows to obtain single-phased particles which after...Marseille Cedex 9, France M. Greenhill-Hooper Imerys Talc Europe, 2 place Édouard Bouillères, BP 33662,...which represents the main difference with natural talc. Spectroscopy data show the influence of the fine |  | | Report (issue) | | STUCKEY, STATE GEOLOGIST BULLETIN NUMBER 56 TALC DEPOSITS OF THE MURPHY MARBLE BELT BY EARL C....Carolina state Library Raleigh BULLETIN NO. 56 * TALC DEPOSITS OF THE MURPHY MARBLE BELT By EARL C. VAN...herewith manuscript for publication as Bulletin 56, "Talc Deposits of the Murphy Marble Belt." This bulletin...Belt has produced varying amounts of high grade talc for more than 85 years. Although geological work...report indicates that there are ample reserves of talc in the area for long term operations, and it is |  | | Journal (article/letter/editorial) | | chlorite; nickel-exchanged vermiculites; nickeioan talc; and nickeloan sepioiite have been observed in natural...the gem material chrysoprasein Silesiain 1740 by an omcer of the Prussian Army and its subsequentcontrol...(1712-1786). The king used the output of the quarries and mines to adorn his palace,San Souci, at Potsdam. Feuchtw...usedin the liturgical decoration of churches in Austria and Germany. The type occurrenceof these minerals...Klaproth's investigations,chrysoprasehad been regarded as an apple-greencolored quartz. Typical of the early notions |  | | Journal (article/letter/editorial) | | selectively dehydroxylated the nepouite thus allowing an examination to be made of the OR-vibration bands...sites. These cations are randomly distributed in Ni-talc but are mainly segregated into Mg and Ni domains...silicates and have clarified their nomenclature (see Brindley, 1980, for a recent review). It is now generally...kerolite-pimelite minerals have similar MglNiratios as talc-willemseites, they usually occur in much smaller...to the heating for 2 hr at selected temperatures (see Figures 3, 4, and 6). The concentration of clay in |  | | Journal (article/letter/editorial) | | doesphlogopite. A breakdown loop involving the production of talc marks the lower thermal stability of intermediate...fluorinatedamphiboleswas undeftakenby the u.s. Bureau of Mines in the 1950's(summarizedin shell, come'Mineralo...ches Institut Miinchen 2, West Germany. 1386 der universitat Miinchen, 8000 FLUORINE-HYDROXY L...tremolite which appears on the join between diopside and talc. The plane defined by wollastonite, enstatite, and...enstatite; F = forsterite; Tr = talc; Serp - serpentine; Br = brucite. tremolite; An - anthophyllite; Tc: 1954) |
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