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Pyrrhotite in the Netherlands

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  • J Dekkers Google Scholar Citations

    J Dekkers Google Scholar Citations

    Agnetic properties of natural pyrrhotite Part I Behaviour of initial susceptibility and saturationmagnetizationrelated rockmagnetic parameters in a grainsize dependent MJ Dekkers Physics of the Earth and Planetary Interiors 52 34 376393 1988

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  • Nickel Wikipedia

    Nickel Wikipedia

    Nickel is preeminently an alloy metal and its chief use is in nickel steels and nickel cast irons in which it typically increases the tensile strength toughness and elastic limit It is widely used in many other alloys including nickel brasses and bronzes and alloys with copper chromium aluminium lead cobalt silver and gold Inconel Incoloy Monel Nimonic

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  • Professor Andrew P Roberts ANU Research School Of Earth

    Professor Andrew P Roberts ANU Research School Of Earth

    AP Roberts AJ Barker A late diagenetic synfolding magnetization carried by pyrrhotite implications for paleomagnetic studies from magnetic iron sulphidebearing sediments Earth and Planetary Science Letters 200 371386 2002

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  • Pyrrhotite Crystal Etsy

    Pyrrhotite Crystal Etsy

    You searched for pyrrhotite crystal Etsy is the home to thousands of handmade vintage and oneofakind products and gifts related to your search No matter what youre looking for or where you are in the world our global marketplace of sellers can help you find unique and affordable options Lets get started

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  • Qubec And The Pyrrhotite Problem An Update

    Qubec And The Pyrrhotite Problem An Update

    Qubec and the pyrrhotite problem An update Presented at the 2014 International Housing Home Warranty Conference Vancouver Canada M Bruno Nantel architect MBA HEC Rdactr technique Association professionnelle des constructrs dhabitations du Qubec

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  • Crumbling Concrete Foundations In Connecticut

    Crumbling Concrete Foundations In Connecticut

    Pyrrhotite expands when exposed to water and oxygen which causes concrete containing it to crack and swell Foundations containing pyrrhotite may develop cracks and gaps that expand over time impacting the attached structure and causing the concrete to crumble According to the Capitol Region Council of Governments homes in at least 36

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  • HE FIRST 300 KeV DOUBLE CSCORRECTED AND

    HE FIRST 300 KeV DOUBLE CSCORRECTED AND

    Pyrrhotite in the Cscorrected HRTEM image shown in Figures 4 and 5 The corresponding FFT inset indicates that 2Hpyrrhotite structure hexagonal lattice with a 344 and c 588 Figure 5 shows a region of the same HRTEM image together with a schematic diagram of the structural projection of

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  • AhoneyAggregates Containing Pyrrhotite

    AhoneyAggregates Containing Pyrrhotite

    Three Rivers Quebec Using 023 by volume pyrrhotite threshold Oslo Norway Spain Cornwall England MundicBlocks Houses built from 19001950s using blocks with mine waste as aggregate Mundicis an old Cornish word for iron pyrites Developed a risk based system for insurance and mortgage purposes

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  • He Effect Of Conditioning On The Flotation Of Pyrrhotite

    He Effect Of Conditioning On The Flotation Of Pyrrhotite

    Pyrrhotite minerals which were sorted out based on the color differences Xray diffraction analyses Figure1 of the handsorted pyrrhotite concentrates indicated that the sample was of considerably high purity with trace amounts of pyrite The dry sample was ground in a labscale ball mill using

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  • Chalcophile And Platinumgroup Element PGE SpringerLink

    Chalcophile And Platinumgroup Element PGE SpringerLink

    Cobalt is the dominant chalcophile element present in pentlandite 3500 to 14500 ppm and pyrrhotite 100 to 160 ppm but it is below detection in chalcopyrite Table 3 Zinc is the dominant trace element in chalcopyrite 370 to 1100 ppm

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  • Novel Pyrrhotite Detection Method In Concrete Aggregate

    Novel Pyrrhotite Detection Method In Concrete Aggregate

    Pyrrhotite is an iron sulfide mineral found in diverse rock types Its presence in the aggregate used for concrete construction can produce damaging effects associated with oxidation of pyrrhotite in the presence of water and oxygen Available methods of detecting pyrrhotite

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  • Pyrrhotite Definition Of Pyrrhotite At

    Pyrrhotite Definition Of Pyrrhotite At

    Pyrrhotite definition a mon mineral iron sulfide approximately FeS but variable because of a partial absence of ferrous ions occurring in massive and in crystal forms with a bronze color and metallic luster magnetic pyrites generally slightly magnetic See more

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  • Pyrite And Pyrrhotite Rgie Du Btiment Du Qubec

    Pyrite And Pyrrhotite Rgie Du Btiment Du Qubec

    Pyrrhotite is a mineral species posed of iron sulfide and is of a bronze yellow color blackening when exposed to air When it crystallizes in blades pyrrhotite can produce cracks in the concrete structures The role of the RBQ regarding issues related to pyrite or pyrrhotite

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  • Pyrrhotite The Pebble Collection

    Pyrrhotite The Pebble Collection

    30047 Pyrrhotite AndraditeUvarovite Calcite Diopside Avebury Nickel Deposit Avebury mine Zeehan district West Coast municipality Tasmania Brassy crystal of pyrrhotite with tiny bright green andraditvarovite series garnet crystals pale diopside and flattened calcite

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  • Pyrrhotite Etsy

    Pyrrhotite Etsy

    You searched for pyrrhotite Etsy is the home to thousands of handmade vintage and oneofakind products and gifts related to your search No matter what youre looking for or where you are in the world our global marketplace of sellers can help you find unique and affordable options Lets get started

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  • Shock And Static Pressure Demagnetization Of

    Shock And Static Pressure Demagnetization Of

    On pyrrhotite Dekkers 1988 Nkoma and Ekosse 1999 In all specimens the maximum peak intensity in the Xray diffraction patterns occurs for the 208 plane indicative of pyrrhotite In the polycrystalline sample a doublet occurs with peaks located at 20473 and 20615 Fig S1 indicative of monoclinic pyrrhotite Yund and

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  • Pyrrhotite Mineral Data

    Pyrrhotite Mineral Data

    Visit our Advertisers for Pyrrhotite A Bijoux Google Search for Pyrrhotite Dakota Matrix Minerals Google Search for Pyrrhotite John Betts Fine Minerals Search for Pyrrhotite McDougall Minerals Google Search for Pyrrhotite Rock and Mineral Shows Google Search for Pyrrhotite Weinrich Minerals Inc Google Search for Pyrrhotite Ask about

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  • Ailing Foundations Massachusetts Homeowners With

    Ailing Foundations Massachusetts Homeowners With

    Naturally occurring pyrrhotite reacts with water and air It expands causing concrete to crack and fissure It can often take 10 15 or 20 years for cracking to bee evident

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  • Pyrrhotite Wikidata

    Pyrrhotite Wikidata

    Sulfide mineral polytypes 11H 3T 4C 4H 4M 5C 6C 6M 7H This page was last edited on 1 October 2019 at 1419 All structured data from the main Property Lexeme and EntitySchema namespaces is available under the Creative Commons CC0 License text in the other namespaces is available under the Creative Commons AttributionShareAlike License additional terms may apply

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  • PDF Pyrite And Pyrrhotite Open Circuit Potentials Study

    PDF Pyrite And Pyrrhotite Open Circuit Potentials Study

    Since the pyrrhotite contains relatively more iron approximately 60 Fe than pyrite approximately 47 Fe the misreporting of pyrrhotite in concentrates dilutes the grade of the metal 34

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  • Y Pyrrhotite In Concrete Story OReilly Talbot Okun

    Y Pyrrhotite In Concrete Story OReilly Talbot Okun

    Jul 18 2019Pyrrhotite Revealed While we were not this first ones in the area to have a problem with crumbling concrete to my knowledge we were the very first to collect core samples for petrographic analysis When we got the lab results back it turned out there was no ASR in the core samples instead the problem was the presence of pyrrhotite in the

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  • Cyanide Leaching And Deposition Of Pyrrhotite

    Cyanide Leaching And Deposition Of Pyrrhotite

    Research on cyanidation methods brought considerable discussion on the reactions involved in the leaching and deposition of pyrrhotite in cyanide solutions Pyrrhotite has one loosely held sulphur atom which readily reacts with cyanide to form thiocyanate Fe5S6 NaCN NaCNS 5 FeS The ferrous sulphide oxidizes rapidly to the sulphate which reacts with cyanide to form ferrocyanide

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  • State Links Pyrrhotite To Crumbling Concrete Companies

    State Links Pyrrhotite To Crumbling Concrete Companies

    Hrough its investigation the state has determined pyrrhotite found at Beckers Quarry is partially to blame for crumbling concrete foundations a conclusion disputed by JJ Mottes

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  • Wisconsin Geological Natural History Survey Pyrrhotite

    Wisconsin Geological Natural History Survey Pyrrhotite

    He pyrrhotite apparently formed during the metamorphism of the deposit Mudrey 1979 Pyrrhotite is mon at the Lynn massive sulfide deposit where it occurs with sphalerite galena chalcopyrite silver and gold minerals Kennedy 1993 Significant pyrrhotite occurs in sec 30 T36N R11E Dutton and Bradley 1970

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  • Pyrrhotite FNXINNOV

    Pyrrhotite FNXINNOV

    Pyrrhotite is a sulphurous stone that is present mainly in the Mauricie region which strongly reacts to humidity air and oxygen The oxidation reaction of this extremely harmful granulate causes an expansion within the concrete creating large cracks to foundations and other concrete structures

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  • Pyrrhotite Calcite Stan Terg Trepca Kosovo EBay

    Pyrrhotite Calcite Stan Terg Trepca Kosovo EBay

    Wonderful specimen of hexagonal pyrrhotite crystals covered by small calcite with some quartz and arsenopyrite Classic location Trepca in Kosovo Size 95 x 75 x 40 cm Weight 500 g Seller assumes all responsibility for this listing Shipping and handling

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  • Crumbling Foundations Connecticut

    Crumbling Foundations Connecticut

    Pyrrhotite causes the slow deterioration of the concrete when exposed to oxygen and water While the presence of pyrrhotite indicates the potential for concrete deterioration its existence alone does not necessarily cause it The cracking starts small and may take more than 10 years to over 30 years to appear Horizontal cracks or cracks that

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  • How To Use Pyrite In A Sentence

    How To Use Pyrite In A Sentence

    At Azegour Morocco uraninite occurs in tactite with molybdenite chalcopyrite barite pyrite hematite and garnet Microcrystals of pyrrhotite goethite pyrite galena and calcite are found on the dumps Chalcopyrite is occasionally found in the manto orebodies as small crystals on sphalerite and pyrite The mordenite is associated with a hemispherical form of pale yellow calcite and

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  • Part 1 Pyrrhotite Plague Is Killing The American Dream

    Part 1 Pyrrhotite Plague Is Killing The American Dream

    Ay 28 2017It is showing the roadmap cracks in its basement walls that are characteristic of the pyrrhotite plague To help pay for a new foundation she is

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  • Evolution Of Pyrrhotite Oxidation In Aggregates For

    Evolution Of Pyrrhotite Oxidation In Aggregates For

    Cal position profile of the pyrrhotite surface The authors noted that the deepest layer of the particle is posed of unreacted pyrrhotite the second layer is a mixture of Fe 2 S 3 and Fe 7 S 8 while the next layer is pyrrhotite with a stoichiometry approaching of the pyrite 19 Finally the external layer pyrrhotite

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  • Hermal Alteration Of Pyrite To Pyrrhotite During

    Hermal Alteration Of Pyrite To Pyrrhotite During

    He presence of pyrrhotite in bination with pyritetopyrrhotite reaction kinetics constrains the peak temperature to between 640 and 800C The integrated mineralmagnetic microscopic and kinetic approach adopted here is a useful tool to identify seismic slip along faults without frictional melt and establish the associated maximum temperature

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  • Pyrrhotite

    Pyrrhotite

    A diamondshaped pyrrhotite crystal sticks edgewise out of a matrix of smaller pyrrhotites galena crystals and coated quartz crystals The pyrrhotite measures 3 cm and is bright and brassy Its form is quite unusual it IS hexagonal but four of the sides are very long while the other two are extremely short 89 x 54 x 41cm

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  • Erromagnetic Resonance Characterization Of Greigite

    Erromagnetic Resonance Characterization Of Greigite

    Pyrrhotite sample was obtained by crushing the pyrrhotitebearing rocks and magnetically concentrating the pyrrhotite The pyrrhotite was then sieved This sample contains equidimensional pyrrhotite grains in the 100150 mm size range Dekkers 1988 Samples 947and 20131are pyrrhotitebearing metamorphic rocks from Taiwan

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  • Pyrrhotite Contaminated Concrete A Call For

    Pyrrhotite Contaminated Concrete A Call For

    Pyrrhotite concrete has not impacted its structures However there is visual evidence that some mercial and multifamily residential structures are showing telltale signs of pyrrhotite deterioration What is known is that thousands of pyrrhotite foundations are

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  • Some Pyrrhotite In Foundations Could Be OK Experts Say

    Some Pyrrhotite In Foundations Could Be OK Experts Say

    SOUTH WINDSOR At a Thursday meeting with homeowners with crumbling foundations state and local lawmakers explained that some foundations that contain pyrrhotite the mineral causing concrete

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  • Pyrrhotite An Overview ScienceDirect Topics

    Pyrrhotite An Overview ScienceDirect Topics

    Jul 02 2011Pyrrhotite Fig 111 is an unusual iron sulfide with variable iron content Fe 1x S x002The color ranges between bronze yellow and copperred with black streak and metallic luster The hardness varies between 35 and 45 on the Mohs scale and an average specific gravity of 46

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  • Pyrrhotite The Mineral Pyrrhotite Information And Pictures

    Pyrrhotite The Mineral Pyrrhotite Information And Pictures

    Pyrrhotite is monly psdomorphed by Pyrite with plete replacement of the Pyrhottite by sparkling Pyrite crystals Pyrrhotite is named from the Greek word pyrrhos which means color of fireThis is despite the fact that the usual color of Pyrrhotite is a bronze color rather than red however its tarnish may have hints of sparkling red

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  • What Does Pyrrhotite Mean

    What Does Pyrrhotite Mean

    Pyrrhotite Pyrrhotite is an unusual iron sulfide mineral with a variable iron content FeS The FeS endmember is known as troilite Pyrrhotite is also called magnetic pyrite because the color is similar to pyrite and it is weakly magnetic The magnetism increases as

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  • An Investigation Of Surface Oxidation Of Pyrite And

    An Investigation Of Surface Oxidation Of Pyrite And

    J Electroanal Chem 118 1981 327343 327 Elsevier Sequoia SA Lausanne Printed in The Netherlands AN INVESTIGATION OF SURFACE OXIDATION OF PYRITE AND PYRRHOTITE BY LINEAR POTENTIAL SWEEP VOLTAMMETRY IC HAMILTON1 and R WOODS2 iChemistry Department Footscray Institute of Technology PO Box 64 Footscray Victoria 3011 Australia

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  • Pyrrhotite Definition Of Pyrrhotite By MerriamWebster

    Pyrrhotite Definition Of Pyrrhotite By MerriamWebster

    Pyrrhotite definition is a bronzecolored mineral of metallic luster that consists of ferrous sulfide and is attracted by a magnet

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  • Pyrrhotite Topic American Concrete Institute

    Pyrrhotite Topic American Concrete Institute

    He American Concrete Institute Founded in 1904 and headquartered in Farmington Hills Michigan USA the American Concrete Institute is a leading authority and resource worldwide for the development dissemination and adoption of its consensusbased standards technical resources educational programs and proven expertise for individuals and organizations involved in concrete design

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  • Oundation Damage Due To Composition Or Inclusions

    Oundation Damage Due To Composition Or Inclusions

    Oundation cracks or spalling due to choice of materials contents or inclusions Defects in concrete mix too much water for example or defects in placement of steel or iron reinforcement too close to surface for example as well as use of problem materials in concrete such as excessive levels of coal ash cinders or pyrrhotite an cause horizontal vertical or variedpattern or

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  • Connecticut Crumbling Foundations Pyrrhotite Is The Culprit

    Connecticut Crumbling Foundations Pyrrhotite Is The Culprit

    Aug 25 2016Pyrrhotite The mineral pyrrhotite is an iron sulfide which is prone to oxidation The mineral was found to be in the aggregate used to make cement that was used extensively in pouring residential foundations in New England in the 80s and 90s however was previously discovered in Canadian households as far back as the 1970s

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  • How Do Pyrite And Pyrrhotite Damage Building Foundations

    How Do Pyrite And Pyrrhotite Damage Building Foundations

    If pyrite or pyrrhotite are present in the rocks underneath buildings the swelling can push on the foundation walls and basement floor of the building causing cracks and other structural damage In some cases groundwater can then transport sulfates into

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  • Pyrrhotite Mineral Britannica

    Pyrrhotite Mineral Britannica

    Pyrite FeS 2 and pyrrhotite Fe 1 x S are the most mon sulfide minerals Brassy yellow pyrite often called fools goldoccurs variously as an accessory mineral in many rocks in veins and even as a chief ponent of some fossils

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  • Agnetic Transition At 3034 Kelvin In Pyrrhotite Insight

    Agnetic Transition At 3034 Kelvin In Pyrrhotite Insight

    Monoclinic pyrrhotite FeTSs have been rather extensively described 16 pyrrhotite is quoted as a minor magnetic mineral in most paleomagnetic textbooks In fact as will be discussed in this paper the prevalence of pyrrhotite its strong and stable magnetic properties make it potentially as

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  • Navy Seeks Tool To Detect Devastating Mineral In Concrete

    Navy Seeks Tool To Detect Devastating Mineral In Concrete

    Jul 30 2017Navy seeks tool to detect devastating mineral in concrete By Susan Haigh This April 11 2017 file photo shows nuggets of the rustcolored mineral pyrrhotite right and a

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  • Pyrrhotite Mineral Information Data And Localities

    Pyrrhotite Mineral Information Data And Localities

    Pyrrhotite is found with pentlandite in basic igneous rocks veins and metamorphic rocks It is also often found with pyrite marcasite and magnetite It has varying magnetic powers depending on the number of Fe vacancies in the crystal structure

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  • Pyrrhotite Wikipedia

    Pyrrhotite Wikipedia

    Pyrrhotite is an iron sulfide mineral with the formula Fe 1x S x 0 to 02 It is a nonstoichiometric variant of FeS the mineral known as troilite Pyrrhotite is also called magnetic pyrite because the color is similar to pyrite and it is weakly magnetic

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  • UNDERSTANDING PYRRHOTITE IN CONCRETE Concrete

    UNDERSTANDING PYRRHOTITE IN CONCRETE Concrete

    Ar 16 2018Pyrrhotite is the second most mon iron sulfide in nature and it is found associated with pyrite marcasite magnetite and chalcopyrite CSA 2014 Even so aggregate that contains pyrrhotite an unstable form of iron sulfide Fe1xS in quantities that are able to be disruptive to concrete does not appear to be very mon

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