Infobox mineral name Pyrophyllite category Silicate mineral boxwidth boxbgcolor image Pyrophyllite 118706.jpg caption Pearly radial cluster of pyrophyllite from Hillsboro District, Orange County, North Carolina Size 11 x 7.3 x 6.6 cm formula Al sub 2 sub Si sub 4 sub O sub 10 sub OH sub 2 sub symmetry Monoclinic triclinic unit cell a 5.16 , b 8.966 3 , c 9.347 6 91.18 , 100.46 , 89.64 Z 2 molweight 360.31 color Brown green, brownish yellow, greenish, gray green, gray white habit Compact spherulitic aggregates of needlelike radiating crystals as fine grained foliated laminae, granular, massive system Monoclinic 2 m prismatic ref name Mindat or triclinic overline 1 pinacoidal ref name Webmin cleavage 001 Perfect tenacity Flexible inelastic mohs 1.5 2 luster Pearly to dull refractive n sub sub 1.534 1.556, n sub sub 1.586 1.589, n sub sub 1.596 1.601 opticalprop Biaxial 2V 53 ..., 20th ed., p. 430 ISBN 0 471 80580 7 ref Pyrophyllite is a Silicate minerals phyllosilicate mineral ... and swells up to many times its original volume, hence the name pyrophyllite, from the Greek ... to talc . Occurrence File Pyrophyllite 236595.jpg thumb left Radiating fans of golden brown pyrophyllite needles from Champion Mine, White Mts, Mono County, California size 4.0 x 3.0 x 2.3 cm Pyrophyllite ... It is also reported from South Africa where major deposits of pyrophyllite occur within the Ottosdal ... Uses The compact variety of pyrophyllite is used for slate pencils and tailors chalk French chalk , and is carved ... steatite and pinite used for these Chinese carvings are included with pyrophyllite under the terms agalmatolite and pagodite. Citation needed date August 2010 Pyrophyllite is easily machineable ... and for making bricks. Pyrophyllite is also widely used in Pressure experiment high pressure experiments ... journal title Effect of precompression on pressure transmitting efficiency of pyrophyllite gaskets ... es Pirofilita fa fr Pyrophyllite gl Pirofilita he nl Pyrofylliet ja pl Pirofyllit ... more details
Wikisource1911Enc Agalmatolite Pagodite is the name of the stone used by the China Chinese for carving pagoda s and similar objects. Usually soft and sometimes soapy, it can be a greyish green or greyish yellow colour. The name is probably applied to any stone used for this purpose and not one specific variety. Names also used in this context are agalmatolite, steatite , pyrophyllite and pinite . sculpture stub Category Sculpture materials ja nn Agalmatolitt pt Agalmatolito ru uk ... more details
Orphan date February 2009 Infobox Indian Jurisdiction native name Nambulapulakunta type Village locator position right latd longd altitude population total 30134 population as of state name Andhra Pradesh district Anantapu area telephone postal code autocat no footnotes Nambulapulakunta is a village and a Subdivisions of India mandal in Anantapur district in the state of Andhra Pradesh in India . ref cite web url http www.censusindia.gov.in title List of Sub Districts publisher Census of India accessdate 2007 05 29 ref According to the Geological Survey of India , pyrophyllite and radiating crystals of chloritoid are located in the ridges to the north of Nambulapulakunta. ref name India1990 cite book author Geological Survey of India title Records of the Geological Survey of India url http books.google.com books?id zSAJAAAAIAAJ accessdate 13 March 2011 year 1990 publisher Printed for the government of India. page 317 ref References reflist coord missing Andhra Pradesh Category Mandals in Anantapur district Category Villages in Anantapur district Category Geology of India Anantapur geo stub ... more details
Infobox mineral name Svanbergite boxwidth boxbgcolor image Svanbergite w pyrophyllite on andalusite Basic strontium aluminum phosphate Donally Mine near Thorne Minerals County Nevada 1879.jpg imagesize alt caption Svanbergite with pyrophyllite and andalusite category Phosphate minerals formula SrAl sub 3 sub PO sub 4 sub SO sub 4 sub OH sub 6 sub strunz 08.BL.05 dana symmetry Trigonal hexagonal scalenohedral br H M symbol overline 3 2 m br Space group R overline 3 m unit cell a 6.970 6.992 angstrom , c 16.567 16.75 , Z 3 molweight color Colorless, cream yellow, rose, reddish brown colour habit Rhombohedral crystals to pseudocubic granular, massive system Trigonal twinning cleavage Distinct on 0001 fracture tenacity mohs 5 luster Vitreous to adamantine streak diaphaneity Translucent gravity 3.22 density polish opticalprop Uniaxial refractive n sub sub 1.631 1.635 n sub sub 1.646 1.649 birefringence 0.0140 0.0150 pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility impurities alteration other prop1 prop1text references ref name HBM http www.handbookofmineralogy.org pdfs svanbergite.pdf Mineral Handbook ref ref name Webmin http webmineral.com data Svanbergite.shtml Webmineral ref Svanbergite is a colorless, yellow or reddish mineral with the chemical formula strontium Sr aluminum Al sub 3 sub phosphorus P oxygen O sub 4 sub sulfur S O sub 4 sub O hydrogen H sub 6 sub . It has rhombohedral crystals. ref Richard V. Gaines, H. Catherine W. Skinner, Eugene E. Foord, Brian Mason, and Abraham Rosenzweig James Dwight Dana Dana s new mineralogy , p. 962. John Wiley & Sons, 1997 ref It was first described for an occurrence in Varmland , Sweden in 1854 and named for Swedish chemist Lars Fredrik Svanberg 1805 1878 . ref name HBM ref name Webmin It occurs in high aluminium medium grade metamorphic rock s in bauxite ... systems often replacing apatite . It occurs with pyrophyllite , kyanite , andalusite , lazulite ... more details
, pigs, dairy cows and chicken. A major pyrophyllite mine lies near it on the farm Gestoptefontein ... of the Second Boer War . It occurred on March 31, 1901. Pyrophyllite mines A major industry of the Ottosdal area is the pyrophyllite mines located on the farm Gestoptefontein. These mines produce a very high quality pyrophyllite, which is a Silicate minerals phyllosilicate mineral composed of aluminium silicate hydroxide AlSi sub 2 sub O sub 5 sub OH. The pyrophyllite is a metamorphism metamorphosed ... Group . Originally, pyrophyllite was quarried and locally used for tombstones and building stone ... polycrystalline diamonds. Blocks of pyrophyllite are stilled quarried and sold as either ... more details
Coord 56.9114 N 60.7931 E display title Beryozovskoye deposit , Berezovskoe gold deposit , Berezovsky deposit , Berezovsk Mines , and some other names lang ru is the first known primary deposit of gold in Russia . It is located 13 km northwest of Yekaterinburg in the central Urals Federal District . It was discovered in 1745 by a raskolnik Yerofey Markov. ref name uran http www.igg.uran.ru minural serg Mineralog MinKadastrBerez.htm Minerals of the Beryozovskoye gold ore deposit ru icon ref ref http geo.web.ru druza l Berezov.htm Beryozovskoye deposit Au , Middle Ural, Russia ru icon ref The first mine was established in 1747. The deposit is named after the Beryozovka River a tributary of Pyshma River and is associated with the settlement of Berezovsky, now the town of Beryozovsky, Sverdlovsk Oblast . The following minerals were discovered at the deposit aikinite 1789 , vauquelinite 1819 , cassedanneite 1988 , crocoite 1766 , pyrophyllite 1829 , phenicochroite 1839 , embreyite 1972 . ref name uran The discovery of crocoite by Johann Gottlob Lehmann scientist Johann Gottlob Lehmann in 1766 at the Berezovsk Mines was the starting point of the discovery of the element chromium . Berezovsk Mines were for a long time the only source for crocoite and therefore the only source of the pigment chrome yellow . References reflist Category Mines in Russia nl Berjozovskoje ertslaag ... more details
orphan date January 2011 Argillic alteration is hydrothermal alteration of wall rock which introduces clay mineral s including kaolinite , smectite and illite . The process generally occurs at low temperature s and may occur in Atmosphere atmospheric condition s. Argillic alteration is representative of supergene environments where low temperature groundwater becomes acid ic. Argillic assemblages include kaolinite replacing plagioclase and montmorillonite replacing amphibole and plagioclace. Orthoclase is generally stable and unaffected. Argillic grades into phyllic alteration at higher temperatures in an ore deposit hydrothermal system. ref name Guilbert Guilbert, John M. and C. F. Park, Jr., The Geology of Ore Deposits, W. H. Freeman, 1986, pp. 180 184 ISBN 0 7167 1456 6 ref Advanced argillic alteration occurs under lower pH and higher temperature conditions. Kaolinite and dickite occur at lower temperatures whereas pyrophyllite and andalusite occur under high temperature conditions T 300 C . Quartz deposition is common. Alunite , topaz , zunyite , tourmaline , enargite and tennantite may also occur. Greisen alteration is similar. ref name Guilbert References Reflist Category Economic geology Category Petrology petrology stub ... more details
Image Nist stone test wall.jpg thumb 300px right The NIST stone test wall. The NIST stone test wall is an experiment by the United States National Institute of Standards and Technology to determine how different types of construction rock geology stone weather. It includes 2352 samples of stone from 47 different states within the US and 16 different countries. The wall measures approximately 12 m long, 4 m high, 0.6 m thick at the bottom, and 0.3 m at the top. It includes varieties of andesite , argillite slate , basalt , bluestone , breccia , conglomerate geology conglomerate , coquina , coral , dacite , diabase , diorite , dolomite , gabbro , gneiss , granite , granodiorite , greenstone disambiguation greenstone , labradorite , limestone , marble , melaphyre , pitchstone , pumice , pyrophyllite , quartz , quartzite , sandstone , schist , serpentinite , shellstone , soapstone , syenite , travertine , and tuff . The wall was built by one stonemason , Vincent Di Benedeto, in 1948. He used two types of stone setting mortar on the front. He used both a 1 3 lime mortar , with a high calcium hydrate and a 1 0.4 3 portland cement , calcium carbonate whiting , and sand mortar . The wall was moved from its original location in Washington, D.C. to Gaithersburg, Maryland in May 1977. See also PAMELA the Pedestrian Accessibility and Movement Environment Laboratory References http stonewall.nist.gov NIST s stone test wall site Category Stonemasonry Category Building stone Category National Institute of Standards and Technology coord 39.12245 77.22075 display title region US MD type landmark ... more details
no. 8. ref indicated that many of the Klerksdorp spheres found in unaltered pyrophyllite consist of pyrite ... deposits containing them into pyrophyllite. It was also argued that the hematite nodules represent pyrite concretions oxidized by weathering of near surface pyrophyllite deposits. Below the near surface zone of weathering, which has developed in the pyrophyllite, pyrite concretions are unaffected ... that make this claim also incorrectly identify the pyrophyllite quarries, from which these objects ... more details
Infobox mineral name Zunyite category Sorosilicate s boxwidth boxbgcolor image Zunyite 199876.jpg imagesize caption Sharp, pyramids of brown red zunyite from Silver City, Utah Silver City , Tintic District, East Tintic Mountains , Juab County, Utah , USA size 5.5 x 5 x 3.5 cm formula Al sub 13 sub Si sub 5 sub O sub 20 sub OH,F sub 18 sub Cl strunz 9.BJ.55 symmetry Isometric, overline 4 3m unit cell a 13.8654 13.8882 ngstrom Z 4 molweight color Grayish white, flesh red colorless in thin section habit Crystalline occurs as well formed fine sized crystals system Cubic crystal system Isometric Hextetrahedral twinning On 111 , contact and penetration cleavage Good on 111 fracture Uneven tenacity Brittle mohs 7 luster Vitreous refractive n 1.592 1.600 opticalprop Isotropic birefringence pleochroism streak White gravity 2.874 5 meas. 2.87 2.90 calc. density melt fusibility diagnostic solubility diaphaneity Transparent to translucent with inclusions other May fluoresce red under UV references ref name Handbook http rruff.geo.arizona.edu doclib hom zunyite.pdf Handbook of Mineralogy ref ref name Mindat http www.mindat.org min 4433.html Mindat.org ref ref name Webmin http www.webmineral.com data Zunyite.shtml Web Mineral ref Zunyite is a silicate minerals sorosilicate mineral , aluminum Al sub 13 sub silicon Si sub 5 sub oxygen O sub 20 sub O hydrogen H , fluorine F sub 18 sub chlorine Cl , composed of aluminium , silicon , hydrogen , chlorine , oxygen , and fluorine . Occurrence File Zunyite Quartz 62278.jpg thumb left Glassy, translucent, gray tan, pseudohexagonal zunyite crystals on a milky quartz matrix. From the Big Bertha Mine, Dome Rock Mountains , La Paz County, Arizona size 3.3 x 3.2 x 2.8 cm Zunyite occurs in highly aluminous shale s and hydrothermal ly altered volcanic rock s. It occurs in association with pyrophyllite , kaolinite , alunite , diaspore , rutile , pyrite , hematite and quartz . ref name Handbook It was discovered in 1884, and named for ... more details
M. F. Stephenson 1801 after 1878 , whose full name was Dr. Matthew Fleming Stephenson , was born in Virginia . On February 25, 1836, he married Sarah Elizabeth Sumter Lyon. He was considered a Georgia U.S. state Georgia geology and mineral expert, although there is no record of him receiving any formal education in the field of geology. He was one of the first collectors of lazulite , rutile , pyrophyllite , and other minerals. Stephenson wrote various articles on his observations of minerals, as well as mound excavations in Georgia. In the 1870s, several of his articles were published by the Smithsonian Institution , including Account of Ancient Mound builder people Mounds in Georgia and Mounds in Bartow County, Georgia Bartow County near Cartersville, Georgia . These described sites he visited and the artifacts found at each, such as mica mirrors, copper vessels, and quartz . He also published a major treatise in 1871 called Geology and Mineralogy of Georgia for which he is most famous. Other published works include a pamphlet Diamonds and Precious Stones in Georgia in 1878 and a historical sketch in 1866, Report on the Lewis Mine Property, White County, Georgia . He served as the assayer of the Dahlonega Mint in Dahlonega, Georgia in the 1840s. When the gold rush in Georgia was believed to be over, many miners headed west to join the 1849 California Gold Rush . Stephenson thought differently and in the town square proclaimed to over 200 men, Why go to California? In that ridge lies more gold than man ever dreamt of. There s millions in it. This excerpt was retold to Mark Twain by the miners who moved to California from Georgia and may have inspired his character Mulberry Sellers. Sellers was famous for his lines There s gold in them thar hills and there s millions in it. ref cite web url http www.georgiaencyclopedia.org nge Article.jsp?id h 785 title Gold Rush work The New Georgia Encyclopedia publisher Georgia Humanities Council author Williams, David date 2003 ... more details
infobox mineral name Berlinite boxwidth boxbgcolor image imagesize alt caption category Phosphate mineral formula AlPO sub 4 sub strunz 8.AA.05 dana symmetry Trigonal trapezohedral br H M symbol 32 br Space group P3 sub 1 sub 21 unit cell a 4.941 , c 10.94 Z 3 molweight color Colorless, pale gray, may be pale rose colour habit Typically granular to massive system Trigonal twinning Subparallel lamellae cleavage fracture Conchoidal tenacity mohs 6.5 luster Vitreous streak diaphaneity Transparent to translucent gravity 2.64 2.66 density polish opticalprop Uniaxial refractive n sub sub 1.524 n sub sub 1.532 birefringence 0.008 pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility impurities alteration other references ref name HB http rruff.geo.arizona.edu doclib hom berlinite.pdf Handbook of Mineralogy ref ref name Mindat http www.mindat.org min 633.html Mindat.org ref ref name Webmin http www.webmineral.com data Berlinite.shtml Webmineral data ref Berlinite aluminium phosphate , chemical fomula AlPO sub 4 sub is a rare phosphate mineral . It has the same crystal structure as quartz with a low temperature Polymorphism materials science polytype isostructural with quartz and a high temperature polytype isostructural with quartz. ref name Mindat Berlinite can vary from colourless to greyish or pale pink and has translucent crystals. ref name Mindat It was first described in 1868 for an occurrence in the V stan iron mine, Scania , Sweden and named for Nils Johan Berlin 1812 1891 of Lund University . ref name HB ref name Mindat It occurs as a rare mineral in high temperature hydrothermal or Metasomatism metasomatic deposits. ref name HB Associated minerals include augelite , attakolite , kyanite , pyrophyllite , scorzalite , lazulite , gatumbaite , burangaite , amblygonite , phosphosiderite , purpurite , apatite , muscovite , quartz , hematite in granite pegmatite s. It also occurs with alunite , a ... more details
Infobox mineral name Kyanite category Silicate mineral boxwidth boxbgcolor image Kyanite crystals.jpg caption symmetry Triclinic pinacoidal H M Symbol overline 1 Space group P overline 1 unit cell a 7.1262 12 , br b 7.852 10 , br c 5.5724 10 br 89.99 2 , 101.11 2 , 106.03 1 br Z 4 formula Al sub 2 sub SiO sub 5 sub color Blue, white, rarely green, gray, yellow, pink, orange, and black, can be zoned habit Columnar fibrous bladed system Triclinic twinning Lamellar on 100 cleavage 100 perfect 010 imperfect with 79 angle between fracture Splintery tenacity Brittle mohs 4.5 5 parallel to one axis br 6.5 7 perpendicular to that axis luster Vitreous to pearly refractive n 1.712 1.718 n 1.720 1.725 n 1.727 1.734 opticalprop Biaxial pleochroism Trichroic, colorless to pale blue to blue 2V 78 83 streak White gravity 3.53 3.65 measured 3.67 calculated melt fusibility diagnostic solubility diaphaneity Transparent to translucent other references ref name Handbook http rruff.geo.arizona.edu doclib hom kyanite.pdf Handbook of Mineralogy ref ref name Mindat http www.mindat.org min 2303.html MinDat ref ref name Webmin http webmineral.com data Kyanite.shtml Webmineral data ref Kyanite , whose name derives from the Greek word kuanos sometimes referred to as kyanos , meaning deep blue, is a typically blue silicate mineral , commonly found in aluminium rich metamorphic pegmatite s and or sedimentary rock . Kyanite in metamorphic rocks generally indicates pressures higher than 4 kilobars. Although potentially stable at lower pressure and low temperature, the activity of water is usually high enough under such conditions that it is replaced by hydrous aluminosilicates such as muscovite , pyrophyllite , or kaolinite . Kyanite is also known as disthene, rhaeticite and cyanite. Kyanite is a member of the aluminosilicate series, which also includes the Polymorphism materials science polymorph andalusite and the polymorph sillimanite . Kyanite is strongly anisotr ... more details
Image Mineraly.sk mastenec.jpg right thumb Steatite in its raw mineral form Soapstone also known as steatite or soaprock is a metamorphic rock , a talc schist . It is largely composed of the mineral talc and is thus rich in magnesium . It is produced by dynamothermal metamorphism and metasomatism , which occurs in the areas where tectonic plates are subduction subducted , changing rocks by heat and pressure, with influx of fluids, but without melting. It has been a medium for carving for thousands of years. Petrology Image Talc block.jpg thumb right A block of talc Petrology Petrologically , soapstone is composed dominantly of talc , with varying amounts of chlorite group chlorite and amphibole s typically tremolite , anthophyllite , and cummingtonite magnesiocummingtonite , and trace to minor FeCr oxide s. It may be schist ose or massive. Soapstone is formed by the metamorphism of Ultramafic rock ultramafic protolith s e.g. dunite or serpentinite and the metasomatism of siliceous dolostone s. Pyrophyllite , a mineral very similar to talc is sometimes called soapstone in the generic sense since its physical characteristics and industrial uses are similar, Citation needed date April 2008 and because it is also commonly used as a carving material. However this mineral typically does not have such a soapy feel as that from which soapstone derives its name. Physical characteristics Steatite is relatively soft because of the high talc content, talc being one on Mohs scale of mineral hardness Mohs hardness scale , and may feel soapy when touched, hence the name. The term steatite is sometimes used for soapstone. It is often used as an Electrical insulation insulator or housing for electrical components, due to its durability and electrical characteristics and because it can be pressed into complex shapes before firing. Steatite undergoes transformations when heated to temperatures of 1000 1200 C into enstatite and cristobalite in the Mohs scale, this corresponds to an inc ... more details
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