optical properties of biotite mineral

  • Biotite mica: The mineral Biotite information and pictures

    Biotite is a very common form of mica. It is named in honor Jean Baptiste Biot (1774 - 1862), a French physicist, mathematician, and astronomer who researched the mica minerals for their optical properties. Because of Biotite's abundance, its presence is usually lacking in collections except for it being an accessory mineral to other minerals.

  • Pleochroism - Wikipedia

    Pleochroism is an extremely useful tool in mineralogy and gemology for mineral and gem identification, since the number of colors visible from different angles can identify the possible crystalline structure of a gemstone or mineral and therefore help to classify it. Minerals that are otherwise very similar often have very different pleochroic ...

  • Biaxial Minerals - Tulane University

    Biaxial Positive. A mineral is biaxial positive if β is closer to α than to γ.; In this case the acute angle, 2V, between the optic axes is bisected by the γ refractive index direction. Thus we say that γ is the acute bisectrix (BX A), because it bisects this angle.; If a table of optical properties of minerals reports the 2V angle, it usually refers to this acute angle.

  • Optical Properties: Mineral Properties - The Mineral and ...

    Several important optical properties are applicable to minerals and gemstones, and can be very useful for gem identification. With proper equipment, jewelers can easily distinguish a Ruby from Garnet or red glass, even if their outward appearance may be identical. White Light, or visible light, is a form of electromagnetic radiation (energy waves produced by the motion of an electric charge).

  • Biotite: Mineral information, data and localities.

    Named in 1847 by Johann Friedrich Ludwig Hausmann in honour of the French physicist, mathematician, meteoriticist, astronomer, and mineralogist, Jean-Baptiste Biot [April 21, 1774, Paris, France - February 3, 1862, Paris, France], who studied the optical properties

  • OPTICAL PROPERTIES OF MINERALS

    To account for all properties of light we need wave theory and corpuscular theory. We use wave theory to explain the optical behavior of crystals. Assume that visible light travels in straight lines with a transverse motion (vibrates at right angles to direction of propagation) Waves in

  • Biotite (thin section) :: Rocks and Minerals

    Home Rocks and Minerals Biotite (thin section) Reference URL Share . Add tags Comment Rate. To link to this object, paste this link in email, IM or document To embed this object, paste this HTML in website. Biotite (thin section) View Description. Download: small (250x250 max) medium (500x500 max) Large ...

  • Biotite: Meanings, Properties and Powers - A Complete Guide

    Biotite Properties. Biotite is a mineral thats named after French physicist Jean Baptist who studied and researched about it for its optical properties. It is also known as Black Mica. It usually occurs in rust, golden brown, reddish brown,

  • Biotite - Assignment Point

    Biotite. Definition. Biotite is a dark-brown or dark-green to black mica. Biotite is monoclinic and is found in igneous, metamorphic, and sedimentary rocks. It was named by J.F.L. Hausmann in 1847 in honor of the French physicist Jean-Baptiste Biot, who performed early research into the many optical properties

  • Biotite thin section - Phyllosilicates - MicROCKScopic

    For Jean Baptiste Biot (1774-1862), French physicist, who studied the optical differences between the micas. Biotite hand-specimen Formula: K(Mg,Fe) 3 (AlSi 3 O 10 )(F,OH) 2

  • Phlogopite - Wikipedia

    Phlogopite is the magnesium endmember of the biotite solid solution series, with the chemical formula KMg 3 AlSi 3 O 10 (F,OH) 2. Iron substitutes for magnesium in variable amounts leading to the more common biotite with higher iron content. For physical and optical identification, it shares most of the characteristic properties of biotite.

  • Optical Properties of Minerals

    Common opaque minerals are graphite, oxides such as magnetite or ilmenite, and sulfides such as pyrite. Isotropic minerals are minerals that have the same properties in all directions. This means light passes through them in the same way, with the same velocity, no matter what direction the light is travelling.

  • Biotite - Clark Science Center

    The diversity in biotite's composition makes it hard to use optical properties as an indicator for composition. Ferriannite may have alpha and gamma indices as high as 1.677 and 1.721 respectively. Max Birefringence: 0.03-0.07: Strong mineral

  • Biotite Mica - Mineral and Healing Properties

    Biotite was named by J.F.L. Hausmann in 1847 in honour of the French physicist Jean-Baptiste Biot, who, in 1816, researched the optical properties of mica, discovering many unique properties. Interesting Facts. Biotite mica is sometimes called "iron mica" because it is

  • Biotite - Rock-Forming Minerals

    Biotite in clastic sediments is a common mineral when biotite-bearing rocks are exposed nearby. It is not as resistant in the weathering environment as muscovite and gets less frequent with extended transport. Biotite is usually altered to clay minerals montmorillonite and vermiculite.

  • Plagioclase thin section - Tectosilicates - MicROCKScopic

    Plagioclase (series of minerals in the feldspar group), from Greek for oblique and fracture, in reference to the oblique angle between its best cleavages. Anorthite (Ca %90-100 Na %10-0) from Greek for not straight, because of its triclinic symmetry. Bytownite (Ca %70-90 Na %30-10) locality at Bytown (now the city of Ottawa), Canada. ...

  • Biotite - UND

    Biotite With a Halo Around a Zircon Inclusion. This sample is a biotite-cordierite-orthopyroxene gneiss from near Sioux Lookout, Ontario.The field of view, about 2 mm across, is dominated by olive-green-brown biotite.. The largest grain of biotite

  • Optical Properties - Biotite - Google Sites

    Optical properties: The extinction angle is 0, and it is generally pleochroic. It can also contain pleochroic halos around inclusions. It is one of the most strongly colored minerals seen in thin...

  • Basic properties of minerals

    Hence the colour of a mineral may be quite sensitive to mineral composition. The colour of a mineral is caused by absorption of certain wavelengths of incident white light, the resulting transmitted light lacks these particular wavelengths. Common coloured minerals include: biotite, amphibole, pyroxene

  • Biotite | Geology Wiki | Fandom

    Biotite was named by J.F.L. Hausmann in 1847 in honour of the French physicist Jean-Baptiste Biot, who, in 1816, researched the optical properties of mica, discovering many unique properties. Biotite is a sheet silicate. Iron, magnesium, aluminium, silicon, oxygen, and hydrogen form sheets that are weakly bound together by potassium ions. It is ...

  • Hornblende (thin section) :: Rocks and Minerals

    Home Rocks and Minerals Hornblende (thin section) Reference URL Share . Add tags Comment Rate. To link to this object, paste this link in email, IM or document To embed this object, paste this HTML in website. Hornblende (thin section) View Description. Download: small (250x250 max) medium (500x500 max) ...

  • Biotite - University of Glasgow

    Biotite. Mineral structure: Sheet silicate. Common mineral in Granites, Pelites (Schists, Gneisses) Rock-forming minerals associated with Biotite: Quartz, Feldspars, Muscovite. Biotite in Granite. Analyser out : Analyser in : Key optical features of biotite in thin section: Brown Single cleavage Pleochroic High interference colours Straight ...

  • AppendixA Optical Properties of Common Rock-Forming

    Optical Properties of Common Rock-Forming Minerals J. B. Lyons, S. A. Morse, and R. E. Stoiber Distinguishing Characteristics Chemical XI. System and Indices Birefringence "Characteristically parallel, but Mineral Composition Best Cleavage Sign,2V and Relief and Color see Fig. 13-3. A. High Positive Relief Zircon ZrSiO. Tet. (+) 111=1.940 High ...

  • (PDF) Study of Optical Properties of Common Rock-Forming ...

    minerals, namely, quartz, orthoclase, plagioclase, microcline, muscovite and biotite. In continuation to the previous experiment, you will study optical properties of more common rock-forming ...

  • Hornblende | Physical - Optical Properties, Occurrence, Uses

    Jun 13, 2019· Name: The word it is derived from the German horn and blenden, to deceive in allusion to its similarity in appearance to metal-bearing ore minerals. Ferro-hornblende Association: Hedenbergite ; biotite, epidote, albite, quartz (amphibolite) Magnesio-hornblende: Quartz, orthoclase, plagioclase, biotite, magnetite, apatite .

  • LECTURE 4 - MICROSCOPIC STUDY OF MINERALS UNDER

    Minerals show a wide range of colour (i.e. the natural or body colour of a mineral), ranging from colorless minerals (e.g. quartz and feldspars) to colored minerals (e.g. brown biotite, yellow staurolite and green hornblende). Colour is related to the wavelength of visible light,

  • Biotite Mineral Data

    Biotite is now a group name for phlogopite, siderophyllite and eastonite. IMA Status: Not Approved IMA 1998 - Bitote is now the group name : Locality: Common world wide. Link to MinDat Location Data. Name Origin: Named in 1847 after the French physicist, Jean Baptiste Biot (1774 - 1862), who studied the optical properties of the micas.

  • Biotite: Meanings, Properties and Powers - A Complete Guide

    Biotite Properties. Biotite is a mineral thats named after French physicist Jean Baptist who studied and researched about it for its optical properties. It is also known as Black Mica. It usually occurs in rust, golden brown, reddish brown, dark brown, and brown colors. It forms a lens shape when it becomes heated by the sun and outwardly ...

  • Biotite - Clark Science Center

    The diversity in biotite's composition makes it hard to use optical properties as an indicator for composition. Ferriannite may have alpha and gamma indices as high as 1.677 and 1.721 respectively. Max Birefringence: 0.03-0.07: Strong mineral color will often mask the interference colors (3rd to 4th order).

  • Biotite: Properties and Occurrences - Assignment Point

    Biotite is a common phyllosilicate mineral within the mica group, with the approximate chemical formula K(Mg, Fe) 3 AlSi 3 O 10 (F, OH) 2.The name biotite is used in the field and in entry-level geology courses because these minerals generally cannot be distinguished without optical

  • Optical Properties - Biotite - Google Sites

    Optical properties: The extinction angle is 0, and it is generally pleochroic. It can also contain pleochroic halos around inclusions. It is one of the most strongly colored minerals seen in thin section under a microscope. Common biotite can

  • Biotite Mineral | Uses and Properties

    The name "biotite" is used in the field and in entry-level geology courses because these minerals generally cannot be distinguished without optical, chemical, or x-ray analysis. Biotite is a rock-forming mineral found in a wide range of crystalline igneous rocks such as granite , diorite , gabbro , peridotite , and pegmatite .

  • Biotite - NOVA Mineralogy

    Biotite in biotite granite, crossed polars Biotite in lamprophyre associated with the Acadian Orogeny, plane polars Biotite in lamprophyre associated with Acadian Orogeny, crossed polars. Biotite, PPL. Keep an eye on this spot in this grain as you watch the videos below. Thats a textbook zircon with a radioactive decay halo. Biotite, Plane ...

  • ALEX STREKEISEN-Biotite-

    Biotite - K(Mg,Fe 2+) 3 [AlSi 3 O 10 (OH,F) 2 Biotite is a common phyllosilicate mineral within the mica group. Biotite is a solid solution between the end members phlogopite KMg 3 AlSi 3 O 10 (OH) 2 and annite KFe 3 AlSi 3 O 10 (OH) 2, although pure annite does not occur in nature addition, small amounts of Na, Rb, Cs, and Ba may substitute for K, and like in other minerals

  • Biotite: Meanings, Properties and Powers - A Complete Guide

    Biotite Properties. Biotite is a mineral thats named after French physicist Jean Baptist who studied and researched about it for its optical properties. It is also known as Black Mica. It usually occurs in rust, golden brown, reddish brown, dark brown, and brown

  • Facts About Biotite: Meanings, Properties, and Benefits ...

    Apr 17, 2019· Biotite is a common rock forming mineral, which is present in no less than some fraction in most igneous and both contact and regional metamorphic rocks. This common brown or black color of biotite is actually characteristic even though its hard to determine brown biotite from the dark brown phlogopite. In the actual fact, these two are end members in a sequence, which is reliant on the ...

  • Biotite - Hyperleap

    Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula. Biotite was named by J.F.L. Hausmann in 1847 in honor of the French physicist Jean-Baptiste Biot, who performed early research into the many optical properties

  • Biotite - UND

    Biotite With a Halo Around a Zircon Inclusion. This sample is a biotite-cordierite-orthopyroxene gneiss from near Sioux Lookout, Ontario.The field of view, about 2 mm across, is dominated by olive-green-brown biotite.. The largest grain of biotite contains a pelochroic halo (burn mark) around an included zircon. Although hard to identify in this view, the clear, high relief grains to

  • Biotite Mineral Data

    Optical Properties of Biotite : Gladstone-Dale: CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC) ... McDougall Minerals Google Search for Biotite Mineral News Website Link Rock and Mineral Shows Google Search for Biotite Weinrich Minerals, Inc. Google Search for Biotite.

  • ALEX STREKEISEN-Biotite-

    Biotite was named by J.F.L. Hausmann in 1847 in honour of the French physicist Jean-Baptiste Biot, who, in 1816, researched the optical properties of mica, discovering many unique properties. Biotite is a sheet silicate; iron, magnesium, aluminium, silicon, oxygen, and hydrogen form sheets that are weakly bound together by potassium ions.

  • What is biotite cleavage?

    Optical properties Basal sections of biotite in thin section are typically approximately hexagonal in shape and usually appear isotropic under cross-polarized light. Is biotite valuable? Biotite is a common rock forming mineral, being present in at least some percentage in most igneous and both regional and contact metamorphic rocks.

  • Automated mineral identification algorithm using optical ...

    Dec 01, 2015· The accuracy of mineral identification using the method was %99, %98, %96 and %95 for biotite, hornblende, quartz and calcite minerals, respectively. The method is applicable to other minerals and phases for which individual optical properties of crystals do not provide enough discrimination between the relevant phases.

  • Biotite Mica Mineral | Physical and Optical Properties ...

    Apr 22, 2018· Biotite usually occurs in brown to black, dark green variety. It is a name used for a range of black mica minerals with different chemical compositions but with very similar physical properties. These minerals are usually indistinguishable from each other without laboratory analysis. There is a small list of biotite minerals that were down.

  • Difference Between Muscovite and Biotite | Compare the ...

    Aug 12, 2019· Also, the tenacity of biotite is brittle to flexible. It has a vitreous to pearly lustre. The mineral streak of biotite is white. Moreover, its optical properties can vary from transparent to translucent to opaque. The mineral is also useful in determining the age of rocks and in assessing the temperature history of metamorphic rocks.