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Optical properties of bornite

  • Bornite Mineral Data - Mindat

    Isomertieite Arsenopalladinite Gold Bornite. Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite.Polished section (from microprobe analysis) in reflected light. Location: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia.

  • Category:Optical mineralogy - Wikimedia Commons

    The optical properties of rocks and minerals. Media in category "Optical mineralogy" The following 48 files are in this category, out of 48 total. Microscopic image of Bornite.jpg 538 × 698; 86 KB. Microscopic image of pyrrhotite.jpg 642 × 778; 81 KB. Nicol prism.svg 840 × 300;

  • (PDF) Analysis of interfaces in Bornite (Cu5FeS4

    low Bornite) with variable properties [13, 14], which makes it a pro- power, and optical properties of organo-soluble polyaniline organic semiconductor, J. Electron.


    optical properties are so distinct that it is difficult to mistake it for any other chemical compound. It is characterized with a typical tabular morphology and fiery-orange-red anisotropy. In individual covellite grains one may observe continuous transitions from cubanite to semi-bornite (Fig. 4).

  • Optical properties of Ore Minerals

    Optical properties of Ore Minerals. in Reflected Light. THE ORE MICROSCOPE. The basic instrument for petrographic examination of ore minerals or opaque minerals is the ore microscope, which is similar to a conventional petrographic microscope in the system of

  • Minerals: Optical and Physical Properties Rocks Geology

    Example- Bornite and Chalcopyrite. While studying optical properties of a mineral in thin sections under a microscope, it is also usual to determine its optical sign, that is, whether it is optically positive (+) or optically negative (-). This is done on the basis of the

  • Synthesis and Size-Dependent Optical Properties of

    Intermediate band gap semiconductors are an underexplored class of materials with unique optical properties of interest for photovoltaic and optoelectronic applications. Herein, we synthesize highly crystalline cubic Cu3VS4 nanocrystals with tunable edge length of 9, 12, and 18 nm. Because size control is achieved for the first time for this semiconductor, particular emphasis is laid on the

  • Mineralogy: optical mineralogy in crossed polars Life in

    Feb 28, 2011· Mineralogy: optical mineralogy in crossed polars. 28. February, 2011 by Elli Goeke. This is the third in my series on how the petrographic microscope is used in geology. First we had the behavior of light, then minerals in PPL. Todays topic: crossed polars or XPL.


    Optical Properties 2.3.1. Reflectivity Reflectivity is defined as the ratio of the intensity of the light reflected by a mineral to the intensity of the light incident upon it, expressed in percent with a variation from below 10% to nearly in opaque substances. The qualitative degree of reflectivity

  • Some Properties Situated on Bornite Mt», Terrace Area, B.C

    Various Properties * Specimen marked : No. ,2912 Ric -h ore. Ptarmigan Mine, Singlehurst, Bornite Mt., Kitsilas. Megascopic Examination Only one metallic mineral could be seen with the aid of a hand lens. It had the following properties: Massive^flint black colour, 11.3-4^3 G.. 4.5-5> metallic lustre opaqu, e and

  • Miharaite, CuaFePbBiS6, a new mineral from the Mihara

    in bornite closely associated with chalcopyrite (A), and an irregular intergrowh of miharaite and galena is found in bornite, with exsolution lamellae of chal-copyrite (B). Physical and optical properties In reflected light, miharaite is pale gray to grayish_ white with faint bireflectance and shows moderate

  • Mineralogical Notes on Franklin and Streling Hill, New Jersey

    1. Not analyzed. Crystal data above. Optical properties indicate that material is quite pure. 2. Analysis as given indicates almost pure material but the value for ω(Na)=1.840 is somewhat too low for material of that purity. 3. Contains CuO=3.48 per cent. 4. Not analyzed material but probably pure. 5.

  • Iridescence in Metamorphic Rainbow Hematite Gems

    May 08, 2017· Viewed using reflected light optical microscopy at low magnification, the rainbow hematite sample appeared as a composite of gray hematite platelets with a strong silvery luster, and the platelets varied in diameter from 150 to 250 μm (figure 6). The surface properties of bornite. Mineralogical Magazine, Vol. 51, No. 360, pp. 285293

  • ClassicGems :: Bornite Gems

    Bornite may be confused with tarnished Chalcopyrite. Bornite is an important copper ore mineral along with other copper ores such as Chalcopyrite, Covellite, Cuprite, Digenite and Tetrahedrite. Good crystals are rare and so Bornite is commonly known simply as a massive mineral ore.

  • Bornite: Mineral information, data and localities.

    Crystals rare, usually blocky with rough curved faces, pseudo-cubic, pseudo-dodecohedral and rarely pseudo-octahedral. Forms noted: {001}, {011}, {111}, {112}, {223} and {335}. Bornite is orthorhombic at 10 degrees K up to 275 degrees K (~ 2 degrees Celsius).

  • Iron-Content-Dependent, Quasi-Static Dielectric Resonances

    Feb 26, 2021· Manipulation of material composition can often induce unprecedented optoelectronic changes in semiconductor nanocrystals (NCs). Here, we demonstrate that bornite-phase copper iron sulfide (Cu5FeS4) NCs exhibit tunable optical characteristics from visible to near-infrared (NIR) that are strongly dependent on their iron content. These stoichiometry-dependent optical modulations confirm

  • Bornite Mineral Physical - Optical Properties

    Mar 04, 2019· Bornite is a one of natures most colorful minerals thats are copper iron sulfide named after the Austrian mineralogist Ignaz von Born (174291). A major ore of copper, its natural color can be coppery red, coppery brown, or bronze.

  • Bornite Cu5FeS 4 - Handbook of Mineralogy

    Bornite Cu5FeS 4 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic, pseudocubic. Point Group: 2/m 2/m 2/m. Crystals pseudocubic, dodecahedral, octahedral, to 6 cm; commonly granular, compact, or massive, disseminated. Twinning: On {111}; commonly shows penetration twins. Physical Properties: Cleavage: {111} in traces.

  • Hematite [email protected]

    Optical properties of minerals Bornite Cassiterite Chalcocite Chalcopyrite. Chromite Cinnabar Covellite Galena Hematite. Ilmenite Magnetite Marcasite Pyrite Pyrrhotite. Rutile Sphalerite Stibnite Tetrahedrite Wolframite. School of Earth, Atmospheric and Environmental Sciences The University of Manchester. [email protected]

  • Garnet: The mineral Garnet information and pictures

    Garnet is not a single mineral, but a group contains closely related, isomorphous minerals that form a series with each other. The Garnet members form intermediary minerals between each member, and may even intergrow within a single crystal. The Garnets vary only slightly in physical properties, and some of the members may be so similar that they are indistinguishable from one another without

  • KENNETH JAMB DEUMMONS D April 16, 1956

    A8) or bornite (section A2). I doets not, however exhibi, t crystal form as often a cobaltlts oer arsenopyrlte* Optical Properties: Color: White with a bluish tint Hardness: S Anisotropism: strong dar,k blue to dark brown* Itch Reactions: HN0 3: etches deeply excep, itn contact with nlccollte TeCl 3, H 2C1 2, HC1, KOH, and KO aLlH negative are *

  • Synthesis and Optical Properties of Two Cobalt Oxides (CoO

    The optical properties reveal the dual absorption states of Co3O4 corresponding to the Co2+ state (Eg = 1.93 eV) and Co3+ state (Eg = 1.42 eV) along with wide band gap ZnO (3.2 eV). Moreover, the

  • Bornite Mineral Data

    Bornite Isomertieite Arsenopalladinite Gold Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite. Polished section (from microprobe analysis) in reflected light.

  • Cassiterite [email protected]

    Optical properties of minerals Bornite Cassiterite Chalcocite Chalcopyrite. Chromite Cinnabar Covellite Galena Hematite. Ilmenite Magnetite Marcasite Pyrite Pyrrhotite. Rutile Sphalerite Stibnite Tetrahedrite Wolframite. School of Earth, Atmospheric and Environmental Sciences The University of Manchester. [email protected]

  • Synthesis of bornite Cu5FeS4 nanoparticles via high energy

    Jun 15, 2018· Cu 5 FeS 4 bornite nanoparticles with sizes in the range from 10 nm to 40 nm were synthesized by high energy mechanical alloying (MA) and annealing. The phase evolution during MA and the related optical properties were studied. X-ray diffraction analysis showed the crystal structure of synthesized powders to adopt the high bornite phase after 2 h of MA.


    Chemistry and Crystallography (properties) 2. Occurrences and Associations 3. Economics (resources, reserves, extraction) Optical: Opaque Bornite Cu 5 FeS 4 Tetragonal/ Isometric . Boulangerite Pb 5 Sb 4 S 11 Orthorhombic

  • The surface properties of bornite

    Optical properties The colour changes that result from the atmos- pheric tarnishing of both fresh fractured surfaces and polished sections of bornite range from brown- orange on a fresh surface through to red-orange, mauve, purple, and finally, to deep blue. These

  • Covellite - Wikipedia

    Covellite (also known as covelline) is a rare copper sulfide mineral with the formula CuS. This indigo blue mineral is commonly a secondary mineral in limited abundance and although it is not an important ore of copper itself, it is well known to mineral collectors.

  • Thermodynamic and Kinetic Mechanisms of Bornite

    Jun 09, 2020· A thermodynamic and kinetic model is proposed to explain the formation of bornite, chalcopyrite, and magnetite during partial roasting of enargite-containing copper concentrates. The proposed mechanism involves solidsolidgas and solidgas reactions between chalcocite, pyrrhotite, gaseous sulfur, and oxygen. Bornite formation could be explained through a mechanism of

  • Mineralienatlas Lexikon - Bornite (english Version)

    Mindat - search for: Bornite Webmineral - search for:Bornite Handbook-of-Mineralogy - search for: Bornite RRUFF - Raman, XRD and other mineral data - search for: Bornite RRUFF - References and PDF downloads - search for: Bornite American-Mineralogist-Crystal-Structure-Database - search for: Bornite Athena - search for: Bornite: Russian pages

  • Chalcopyrite - Wikipedia

    Chalcopyrite (/ ˌ k æ l k ə ˈ p aɪ r aɪ t,-k oʊ-/ KAL-ko-PY-ryt) is a copper iron sulfide mineral and the most abundant copper ore mineral. It has the chemical formula CuFeS 2 and crystallizes in the tetragonal system. It has a brassy to golden yellow color and a hardness of 3.5 to 4 on the Mohs scale.Its streak is diagnostic as green tinged black. On exposure to air, chalcopyrite

  • Diffuse reflectance spectra and optical properties of some

    Jul 05, 2018· The reliability and utility of diffuse reflectance spectra are briefly but critically reviewed. The results of measurements of diffuse reflectance over the wavelength range 200 < λ < 2500 nm are reported for wüstite, magnetite, hematite, maghemite, ilmenite, ulvöspinel, and α-FeO · OH (goethite), β-FeO 7sd OH, γ-FeO · OH (lepidocrocite), and δ-FeO · OH.

  • Diffuse reflectance spectra and optical properties of some

    copyrite, bornite, orpiment, stibnite, bismuthinite, enargite, and pyrargyrite, and for eight pyrite-type and four NiAs-type compounds. Some spectral assignments have been made. Optical properties are related to the absorption spec- trum (and through this to composition and structure) in a rational way.

  • Chalcocite Cu2S - Handbook of Mineralogy

    bornite. (3) Cu2S. Occurrence: An uncommon primary hydrothermal mineral but important as a secondary mineral. Found in or below the zone of oxidation in hydrothermal veins and in large low-grade porphyry copper orebodies. Association: Pyrite, chalcopyrite, covellite, bornite, molybdenite, many other sulfides and their alteration products.

  • Ore Microscopy 2012 - SlideShare

    Jan 03, 2013· Optical Properties without Analyzer Colour : white, red, blue, brown, yellow Faint yellow or pale yellow Dark or strong red Reddish brown Pentlandite golden Pyrite cremic white Covellite ink blue yellow MarcasiteChalcopyrite yellow Galenabrase yellow white

  • Biotite thin section - Phyllosilicates - MicROCKScopic

    Relief: Moderate positive Habit/Form: Euhedral crystals are not uncommon, are usually tabular parallel to (001), and have a roughly hexagonal cross section. Also found as micaceous or tabular grains, or grains with irregular outline. Grains may be bent, particularly in metamorphic rocks.

  • Physical Properties of Ore Minerals - Zonge International

    Very peculiar optical properties. Bornite: Cu 5 FeS 4: D 2h 15: semiconductor p-type 10-5 to 1.6 large decrease at T = 228°C. 8: piezoelectric ferroelectric ? <228: antiferromagnetic T n ~0°C: slight bireflectance on grain boundaries, very weakly anisotropic. 18.5 to 21.3: Converts to cubic, space group O h 5, high bornite at 228°C

  • Wulfenite gemstone information - Gemstone Database

    Optical Properties of Wulfenite; Refractive Index: 2.280 to 2.405. Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references. Optical Character: Uniaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) Birefringence: 0.120 to 0.122.