Talc Data Sheet
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Phase Equilibria and Thermodynamic Properties of Minerals in the Beo
American Mineralogist, Volwne 71, pages 277-300, 1986 Phaseequilibria and thermodynamic properties of mineralsin the BeO-AlrO3-SiO2-H2O(BASH) system,with petrologicapplications Mlnx D. B.qnroN Department of Earth and SpaceSciences, University of California, Los Angeles,Los Angeles,California 90024 Ansrru,cr The phase relations and thermodynamic properties of behoite (Be(OH)r), bertrandite (BeoSirOr(OH)J, beryl (BerAlrSiuO,r),bromellite (BeO), chrysoberyl (BeAl,Oo), euclase (BeAlSiOo(OH)),and phenakite (BerSiOo)have been quantitatively evaluatedfrom a com- bination of new phase-equilibrium, solubility, calorimetric, and volumetric measurements and with data from the literature. The resulting thermodynamic model is consistentwith natural low-variance assemblagesand can be used to interpret many beryllium-mineral occurTences. Reversedhigh-pressure solid-media experimentslocated the positions of four reactions: BerAlrSiuO,,: BeAlrOo * BerSiOo+ 5SiO, (dry) 20BeAlSiOo(OH): 3BerAlrsi6or8+ TBeAlrOo+ 2BerSiOn+ l0HrO 4BeAlSiOo(OH)+ 2SiOr: BerAlrSiuO,,+ BeAlrOo+ 2H2O BerAlrSiuO,,+ 2AlrSiOs : 3BeAlrOa + 8SiO, (water saturated). Aqueous silica concentrationswere determined by reversedexperiments at I kbar for the following sevenreactions: 2BeO + H4SiO4: BerSiOo+ 2H2O 4BeO + 2HoSiOo: BeoSirO'(OH),+ 3HrO BeAlrOo* BerSiOo+ 5H4Sio4: Be3AlrSiuOr8+ loHro 3BeAlrOo+ 8H4SiO4: BerAlrSiuOrs+ 2AlrSiO5+ l6HrO 3BerSiOo+ 2AlrSiO5+ 7H4SiO4: 2BerAlrSiuOr8+ l4H2o aBeAlsioloH) + Bersio4 + 7H4sio4:2BerAlrsiuors + 14Hro 2BeAlrOo+ BerSiOo+ 3H4SiOo: 4BeAlSiOr(OH)+ 4HrO. -
Fire Retardancy of Polypropylene/Kaolinite Composites Marcos Batistella, Belkacem Otazaghine, Rodolphe Sonnier, Carlos Petter, José-Marie Lopez-Cuesta
Fire retardancy of polypropylene/kaolinite composites Marcos Batistella, Belkacem Otazaghine, Rodolphe Sonnier, Carlos Petter, José-Marie Lopez-Cuesta To cite this version: Marcos Batistella, Belkacem Otazaghine, Rodolphe Sonnier, Carlos Petter, José-Marie Lopez-Cuesta. Fire retardancy of polypropylene/kaolinite composites. Polymer Degradation and Stability, Elsevier, 2016, 129, pp.260-267. 10.1016/j.polymdegradstab.2016.05.003. hal-02906432 HAL Id: hal-02906432 https://hal.archives-ouvertes.fr/hal-02906432 Submitted on 26 May 2021 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Fire retardancy of polypropylene/kaolinite composites * Marcos Batistella a, c, , Belkacem Otazaghine b, Rodolphe Sonnier b, Carlos Petter c, Jose-Marie Lopez-Cuesta b a Federal University of Santa Catarina, R. Eng. Agronomico^ Andrei Cristian Ferreira, s/n e Trindade, Florianopolis, SC, CEP 88040-900, Brazil b Ecole des Mines d’Ales, Centre des Materiaux (C2MA) e Pole^ Materiaux Polymeres Avances, 6 Avenue de Clavieres, 30319, Ales Cedex, France c Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, CEP 91501-970, Brazil abstract In this study the influence of surface modification of kaolinite with trisilanolisooctyl Polyhedral Oligo- SilSesquioxane (POSS) in polypropylene composites was evaluated in terms of thermal stability and fire retardancy and compared with talc. -
Pyrophyllite Solid Solutions in the System A|,O,-S|O,-H,O
American Minerulogist, Volume 59, pages 254-260, 1974 PyrophylliteSolid Solutions in the SystemA|,O,-S|O,-H,O Pnrr,rp E. RoseNnenc D ep art ment ol G eolo gy, 14as hing ton Stat e U nio er sity, P ullman, 14as hington 99 I 6 3 Abstract Pyrophyllite solid solutions have been synthesized in the system Al,O'-SiOr-H,O between 400' and 565'C at 2 kbar from a variety of starting materials using sealed gold tubes and conventional hydrothermal techniques. The duration of experiments was 3-9 weeks. Products were characterized by X-ray measurementsand by infrared spectroscopy. Appreciably larger basal spacings were observed for pyrophyllite synthesized from gels than for natural pyrophyllite; small amounts of quartz were present in these samples. Basal spacings of pyrophyllite synthesized from mixtures of kaolinite and quartz approach but do not equal those of natural pyrophyllite. Rehydroxylation of dehydroxylated pyrophyllite under hydrothermal conditions suggests that enlargement of basal spacings cannot be due to dehydroxylation. Substitution of the type Al"* + H* : Sia* is proposed to explain the observed variations. The coupled substitution of Al3* and (OH)- for Sin*and O- results in expanded basal spacingsdue largely to the formation of OH on the basal surface and in increased thermal stability due to the formation of H-bonds between oxygens in adjacent silica sheets.Analyses of natural pyrophyllite also suggest limited substitution of this type. Failure to recognize these substitutions in synthetic samples accounts, in part, for dis- crepancies in the reported thermal stability of pyrophyllite. Phase characterization, often lack- ing, is essentialin experimentalstudies of mineral stabilities. -
Talc and Pyrophyllite
TALC AND PYROPHYLLITE By Robert L. Virta Domestic survey data and tables were prepared by Raymond I. Eldridge III, statistical assistant, and the world production table was prepared by Glenn J. Wallace, international data coordinator. The mineral talc is a hydrous magnesium silicate. A massive recommended against listing asbestiform talc and talcose rock is called steatite, and an impure massive variety is nonasbestiform talc in its 10th report on carcinogens (U.S. known as soapstone. Talc is used commercially because of its Department of Health and Human Services, Public Health fragrance retention, luster, purity, softness, and whiteness. Service, 2001; National Paint and Coatings Association, Other commercially important properties of talc are its chemical January 2001, NTP skips over talc, accessed January 8, 2001, at inertness, high dielectric strength, high thermal conductivity, URL http://www.paint.org/ind_issue/current/jan/issue05.htm). low electrical conductivity, and oil and grease adsorption. In 2000, the U.S. Department of Defense authorized the Major markets for talc are ceramics, paint, paper, and plastics. disposal of 907 metric tons (t) of block and lump talc, which is Pyrophyllite is a hydrous aluminum silicate with a structure the entire uncommitted inventory in that category, from the similar to talc. Such properties as chemical inertness, high National Defense Stockpile. dielectric strength, high melting point, and low electrical conductivity make it useful for ceramic and refractory Production applications. Talc.—In 2000, seven companies operating nine mines in five Legislation and Government Programs States produced soapstone, steatite, and talc. All were open pit mines. The producers were, in decreasing order of production, The National Toxicology Program (NTP) of the U.S. -
Swelling Capacity of Mixed Talc-Like/Stevensite Layers in White/Green Clay
This is a preprint, the final version is subject to change, of the American Mineralogist (MSA) Cite as Authors (Year) Title. American Mineralogist, in press. DOI: https://doi.org/10.2138/am-2020-6984 1 1 Plagcheck: no concerns 2 Tables?: 3 small 3 Word Count: ~9,100 4 Prod notes: make sure tables in file before RE 5 6 7 8 Swelling capacity of mixed talc-like/stevensite layers in white/green clay 9 infillings (‘deweylite’/‘garnierite’) from serpentine veins of faulted 10 peridotites, New Caledonia 11 REVISION 2 12 Lionel FONTENEAU 1, Laurent CANER 2*, Sabine PETIT 2, Farid JUILLOT 3, Florian 13 PLOQUIN 3, Emmanuel FRITSCH 3 14 15 1Corescan Pty Ltd, 1/127 Grandstand Road, 6104 Ascot, WA, Australia 16 2 Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, IC2MP UMR 17 7285 CNRS, 5 rue Albert Turpain, TSA51106, 86073 Poitiers cedex 9, France 18 * Corresponding author, e-mail: [email protected] 19 3 Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne 20 Universités – Université Pierre et Marie Curie UPMC, UMR CNRS 7590, Museum National 21 d’Histoire Naturelle, UMR IRD 206, 101 Promenade Roger Laroque, Anse Vata, 98848, 22 Nouméa, New Caledonia 23 24 25 Abstract: White (Mg-rich) and green (Ni-rich) clay infillings (‘deweylite’/‘garnierite’) found 26 in serpentine veins of faulted peridotite formations from New Caledonia consist of an intimate 27 mixture of fine-grained and poorly ordered 1:1 and 2:1 layer silicates, commonly referred to 28 as non-expandable serpentine-like (SL) and talc-like (TL) minerals. -
The Pyrophyllite Deposits of North Carolina
North Carolina Department of Conservation and Development Wade H. Phillips, Director BULLETIN NUMBER 37 THE PYROPHYLLITE DEPOSITS OF NORTH CAROLINA With A MORE DETAILED ACCOUNT OF THE GEOLOGY OF THE DEEP RIVER REGION By JASPER L. STUCKEY, Ph. D. RALEIGH 19 28 MEMBERS OF THE BOARD OF CONSERVATION AND DEVELOPMENT Governor A. W. McLean, Chairman, ex offtcio Raleigh S. Wade Marr __._ Raleigh B. B. Gossett Charlotte Jas. G. K. McClure, Jr Asheville Fred I. Sutton ~ _: .. Kinston E. D. Cranford . Asheboro R. Bruce Btheridge Manteo Santford Martin . ; Winston-Salem E. S. Askew Merry Hill J. Q. Gilket Marion F. S. Worthy Washington George L. Hampton Canton Frank H. Stedman Fayetteville Wade H. Phillips, Director, Raleigh LETTER OF TRANSMITTAL Raleigh, N. C, August 1, 1928. To His Excellency, Hon. A. W. McLean, Governor of North Carolina. Sir:—I herewith submit for publication as Bulletin No. 37 of the publications of the North Carolina Department of Con servation and Development a report on The Pyrophyllite De posits of North Carolina, which has been prepared by Dr. Jasper L. Stuckey, former State Geologist. This is the first complete report on the pyrophyllite deposits of this State and will, therefore, be of great interest to those who desire infor mation on such material. Yours respectfully, Wade H. Phillips, Director, North Carolina Department of Conservation and Development. AUTHOR'S FOREWORD This report was begun as a special investigation of the geology and pyrophyllite deposits of the Deep River Region, and accord ingly a detailed geologic map of that region was prepared. As the work progressed, other pyrophyllite deposits were found outside the area mapped. -
Commodities, Part 5 Strontium, Sodium Sulfate, Trona (Soda Ash), Talc, Lithium, Summary Comments Safety Reminders
ME571/GEO571 Geology of Industrial Minerals Spring 2018 Commodities, Part 5 strontium, sodium sulfate, trona (soda ash), talc, lithium, summary comments Safety Reminders Commodity presentations—send me your powerpoints April 28 AIPG meeting and Field trip in afternoon (perlite mine or carbonatites) Research Projects presentation April 30 Finals, written Project due May 4 No class May 7 Strontium Strontium—introduction • Sr • 15th abundant element • does not occur naturally as an element, in compounds • No production in the United States since 1959 • celestite or celestine SrSO4 (same structure as barite) 56.4% Sr • strontianite SrCO3, 70.1% Sr Celesitite http://www.zeuter.com/~tburden Strontianite http://www.zeuter.com/~tburden Strontium and strontianite are named after Stronian, a village in Scotland near which the mineral was discovered in 1790 by Adair Crawford and William Cruickshank A critical mineral Strontium—uses • faceplate glass of color television picture tubes, 77% • ferrite ceramic magnets, 8% • pyrotechnics and signals, 9% – fireworks (red flame) – flares • other applications, 6% – refining zinc – optical materials Strontium—production USGS Mineral Yearbooks metric tons Strontium—geology • association with rocks deposited by the evaporation of sea water (evaporites) • igneous rocks • Brines • Barite and calcite must be removed— costly Sodium sulfate Sodium sulfate—introduction • disodium sulfate (Na2SO4), • inorganic chemical • Thenardite Na2SO4 • Hanksite Na22K(SO4)9(CO3)2Cl • Glauberite Na2Ca(SO4)2 Sodium sulfate—uses -
The Cordierite Formation in Mechanically Activated Talc-Kaoline-Alumina-Basalt-Quartz Ceramic System D
Vol. 127 (2015) ACTA PHYSICA POLONICA A No. 4 Proceedings of the 4th International Congress APMAS2014, April 24-27, 2014, Fethiye, Turkey The Cordierite Formation in Mechanically Activated Talc-Kaoline-Alumina-Basalt-Quartz Ceramic System D. Kirsever*, N. Karakus, N. Toplan, H.O. Toplan Sakarya University, Metalurgy and Materials Engineering, 54187 Sakarya, Turkey The powder mixtures of Talc-Kaolinite-Alumina-Basalt-Quartz were mechanically activated in a planetary ball mill for 1 hour. The structural alterations and thermal behaviour of the powder mixture were examined by X-ray diraction (XRD), scanning electron microscopy (SEM) and thermal analysis (TG-DTA). The results showed that the mechanical activation led to amorphisation and decreased the temperature of cordierite formation. DOI: 10.12693/APhysPolA.127.1042 PACS: 81.05.Je 1. Introduction a high-energy ball mill. In this process, a small quantity of the blended elemental powder mixture is loaded into a Cordierite, which chemical composition is container, along with the grinding media, and the whole 2MgO 2Al O 5SiO , is one of the phases of the · 2 3· 2 mass is agitated at a high speed for a predetermined ternary MgOSiO Al O system, along with mullite, 2 2 3 length of time [5]. The mechano-activation treatment cristobalite, tridymite, enstatite, forsterite, sapphirine, might promote: the amorphization of treated material, etc. Cordierite-based materials have a great importance noticeable change of the microstructure, size and shape in modern technology due to their excellent properties, of particles, etc. Furthermore, ultra-ne grinding kinetic such as low thermal expansion coecient, high refrac- investigation indicates the mechano-chemical reduction toriness, low dielectric constant, high thermal shock of the original particles of talc/mica, which appears to resistance and good mechanical properties [1]. -
Talc Processing
11.26 Talc Processing 11.26.1 Process Description1-9 . Talc, which is a soft, hydrous magnesium silicate (3Mg0 4Si02 H20), is used in a wide range of industries including the manufacture of ceramics, paints, paper, and asphalt roofing. The end-uses for talc are determined by variables such as chemical and mineralogical composition, particle size and shape, specific gravity, hardness, and color. There is no Source Classification Code (SCC) for the source category. Over 95 percent of the talc ore produced in the United States comes from open-pit mines. Mining operations usually consist of conventional drilling and blasting methods. Figure 11.26-1 is a process flow diagram for a typical domestic talc plant. Talc ore generally is hauled to the plant by truck from a nearby mine. The ore is crushed, typically in a jaw crusher, and screened. The coarse (oversize) material then is returned to the crusher. Rotary dryers may be used to dry the material. Secondary grinding is achieved with pebble mills or roller mills, producing a product that is 44 to 149 micrometers ( m) (325 to 100 mesh) in size. Some roller mills are designed to use heated air to dry the material as it is being ground. Hammer mills or steam- or compressed air- powered jet mills may be used to produce additional final products. Air classifiers (separators), generally in closed circuit with the mills, separate the material into coarse, coarse-plus-fine, and fine fractions. The coarse and coarse-plus-fine fractions then are stored as products. The fines may be concentrated using a shaking table (tabling process) to separate product containing small quantities of nickel, iron, cobalt, or other minerals and then may undergo a one-step flotation process. -
What We Know About Subduction Zones from the Metamorphic Rock Record
What we know about subduction zones from the metamorphic rock record Sarah Penniston-Dorland University of Maryland Subduction zones are complex We can learn a lot about processes occurring within active subduction zones by analysis of metamorphic rocks exhumed from ancient subduction zones Accreonary prism • Rocks are exhumed from a wide range of different parts of subduction zones. • Exhumed rocks from fossil subduction zones tell us about materials, conditions and processes within subduction zones • They provide complementary information to observations from active subduction systems Tatsumi, 2005 The subduction interface is more complex than we usually draw Mélange (Bebout, and Penniston-Dorland, 2015) Information from exhumed metamorphic rocks 1. Thermal structure The minerals in exhumed rocks of the subducted slab provide information about the thermal structure of subduction zones. 2. Fluids Metamorphism generates fluids. Fossil subduction zones preserve records of fluid-related processes. 3. Rheology and deformation Rocks from fossil subduction zones record deformation histories and provide information about the nature of the interface and the physical properties of rocks at the interface. 4. Geochemical cycling Metamorphism of the subducting slab plays a key role in the cycling of various elements through subduction zones. Thermal structure Equilibrium Thermodynamics provides the basis for estimating P-T conditions using mineral assemblages and compositions Systems act to minimize Gibbs Free Energy (chemical potential energy) Metamorphic facies and tectonic environment SubduconSubducon zone metamorphism zone metamorphism Regional metamorphism during collision Mid-ocean ridge metamorphism Contact metamorphism around plutons Determining P-T conditions from metamorphic rocks Assumption of chemical equilibrium Classic thermobarometry Based on equilibrium reactions for minerals in rocks, uses the compositions of those minerals and their thermodynamic properties e.g. -
Structures of the 2:1 Layers of Pyrophyllite and Talc
Clays and Clay Minerals, Vol. 60, No. 6, 574–587, 2012. STRUCTURES OF THE 2:1 LAYERS OF PYROPHYLLITE AND TALC 1 2 1, 3 V ICTOR A. DRITS ,STEPHEN G UGGENHEIM ,BELLA B. ZVIAGINA *, AND T OSHIHIRO K OGURE 1 Geological Institute of the Russian Academy of Science, Pyzhevsky per. 7, 119017 Moscow, Russia 2 Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, IL 60607, USA 3 Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan Abstract—To determine the relationships between the symmetry of the overall pyrophyllite and talc structure and the symmetry of individual layers, the geometry and symmetry of each 2:1 layer of pyrophyllite and talc were analyzed. For each, the previously published, refined unit cell may be rotated clockwise by ~60º for comparison to a layer unit cell. In pyrophyllite, the layer unit cell is ideal and shown to be orthogonal with C2/m symmetry. The agreement between the refined atomic coordinates and those calculated for the layer with C2/m symmetry confirms that the symmetry of the pyrophyllite layer is C2/m. The obliquity of the pyrophyllite refined cell results from the layer stacking and the choice of unit cell, but the interlayer stacking sequence does not disturb the layer symmetry. In contrast, talc has an oblique layer cell, without a mirror plane. For the most part, the distortion of the talc 2:1 layer is probably caused by an elongation of unshared OÀO lateral edges around M1 that creates a slight corrugation of the octahedral sheet surface. -
Minerals Found in Michigan Listed by County
Michigan Minerals Listed by Mineral Name Based on MI DEQ GSD Bulletin 6 “Mineralogy of Michigan” Actinolite, Dickinson, Gogebic, Gratiot, and Anthonyite, Houghton County Marquette counties Anthophyllite, Dickinson, and Marquette counties Aegirinaugite, Marquette County Antigorite, Dickinson, and Marquette counties Aegirine, Marquette County Apatite, Baraga, Dickinson, Houghton, Iron, Albite, Dickinson, Gratiot, Houghton, Keweenaw, Kalkaska, Keweenaw, Marquette, and Monroe and Marquette counties counties Algodonite, Baraga, Houghton, Keweenaw, and Aphrosiderite, Gogebic, Iron, and Marquette Ontonagon counties counties Allanite, Gogebic, Iron, and Marquette counties Apophyllite, Houghton, and Keweenaw counties Almandite, Dickinson, Keweenaw, and Marquette Aragonite, Gogebic, Iron, Jackson, Marquette, and counties Monroe counties Alunite, Iron County Arsenopyrite, Marquette, and Menominee counties Analcite, Houghton, Keweenaw, and Ontonagon counties Atacamite, Houghton, Keweenaw, and Ontonagon counties Anatase, Gratiot, Houghton, Keweenaw, Marquette, and Ontonagon counties Augite, Dickinson, Genesee, Gratiot, Houghton, Iron, Keweenaw, Marquette, and Ontonagon counties Andalusite, Iron, and Marquette counties Awarurite, Marquette County Andesine, Keweenaw County Axinite, Gogebic, and Marquette counties Andradite, Dickinson County Azurite, Dickinson, Keweenaw, Marquette, and Anglesite, Marquette County Ontonagon counties Anhydrite, Bay, Berrien, Gratiot, Houghton, Babingtonite, Keweenaw County Isabella, Kalamazoo, Kent, Keweenaw, Macomb, Manistee,