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  • Optical constants of monoclinic anisotropic crystals: gypsum

    The principal complex refractive indices for gypsum have been derived in the infrared region of the spectrum. These values were obtained by dispersion analysis of the reflection spectra for E ‖ b and the a-c (monoclinic) plane. Two sets of complex indices are .

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  • Optical constants of monoclinic anisotropic crystals - Gypsum

    Sign on. The principal complex refractive indices for gypsum have been derived in the infrared region of the spectrum. These values were obtained by dispersion analysis of the reflection spectra for E parallel to b and the a-c (monoclinic) plane. Two sets of complex indices are obtained for the latter plane, taking account of axis wander.

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  • gypsum Dictionary of English

    gypsum /ˈdʒɪpsəm/. n. a colourless or white mineral sometimes tinted by impurities, found in beds as an evaporite. It is used in the manufacture of plaster of Paris, cement, paint, school chalk, glass, and fertilizer. Composition: hydrated calcium sulphate.

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  • Monoclinic - definition of monoclinic by The Free Dictionary

    (mŏn′ə-klĭn′ĭk) Relating to a crystal having three axes of different lengths. Two of the axes are at oblique angles to each other, and the third axis is perpendicular to the plane that is made by the other two. The mineral gypsum has monoclinic crystals. See more at crystal.

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  • Minerals to know - Macomb Science Olympiad

    Gypsum family 5A &11 • Crystal Shape-Monoclinic, often bladed or elongated • Cleavage-Rhombohedral, 3 directions (1 good, 2 poor) none at 90° • Fracture-splintery • Slightly soluble in water Bladed Rose Rhombohedral Cleavage Splintery Fracture Monoclinic Elongated

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  • Gypsum definition and meaning | Collins English Dictionary

    Gypsum definition: Gypsum is a soft white substance which looks like chalk and which is used to make plaster... | Meaning, pronunciation, translations and examples ... a very soft, monoclinic mineral, CaSO 4 ·2H 2 O, commonly found with other evaporites in sedimentary rock and used to .

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  • External Symmetry of Crystals, 32 Crystal Classes

    Monoclinic System. Common minerals that occur with this symmetry are anatase, cassiterite, apophyllite, zircon, and vesuvianite. Note that I will not have time in lecture to cover the rest of the 32 crystal classes, that is those belonging to the hexagonal and isometric systems. These are difficult to draw,...

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  • Gypsum - Wikipedia

    Gypsum is a very saft sulfate meeneral componed o calcium sulfate dihydrate, wi the chemical formula CaSO 4 ·2H 2 O. It can be uised as a fertilizer, is the main .

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  • 8H 2 O Borax Monoclinic Prismatic Gypsum CaSO 4 2H 2 O ...

    8H 2 O Borax Monoclinic-Prismatic Gypsum CaSO 4 · 2H 2 O Gypsite Monoclinic-Prismatic Pyrite FeS 2 Fools Gold Isometric Diploidal Rutile TiO 2 Sagenite Tetragonal-Ditetragonal-Dipyramidal Sulfur S 8 Sulfur Orthombic-Dipyramidal III.

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  • Gypsum | Natural History Museum of Utah

    Gypsum, CaSO4.2H2O Jet, Alfalfa County, Oklahoma Gift of Lloyd Gunther UMNH.MC.3052

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  • Minerals in the Monoclinic crystal system

    Minerals in the Monoclinic crystal system. Acanthite Achalaite Actinolite Acuminite Admontite Adolfpateraite Aegirine Aegirine-augite Aerinite Aerugite Afwillite Agricolaite Aguilarite Ahlfeldite Akaganeite Akaogiite Aklimaite Akopovaite Akrochordite ... Gypsum Hagendorfite Häggite Haigerachite

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  • Corundum Carl Website - Diamond Dan Publications

    The Monoclinic System includes the minerals gypsum, augite, biotite, epidote, and hornblende. 7. The Triclinic System includes the minerals plagioclase feldspar, ulexite, turquoise, and albite. There are 12 crystal models for you to make in this book. Cut each crystal model out on .

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  • gypsum | Definition, Uses, & Facts | Britannica

    Gypsum plaster is a white cementing material made by partial or complete dehydration of the mineral gypsum, commonly with special retarders or hardeners added. Applied in a plastic state (with water), it sets and hardens by chemical recombination of the gypsum with water.

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  • Gypsum crusher and grinding mill - YouTube

    Dec 11, 2016· Gypsum Grinding Mill, Gypsum Mill, Gypsum Crusher Gypsum is monoclinic mineral and the main chemical composition is calcium sulfate (CaSO4).

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  • Gypsum - Wikipedia

    Gypsum is a very saft sulfate meeneral componed o calcium sulfate dihydrate, wi the chemical formula CaSO 4 ·2H 2 O. It can be uised as a fertilizer, is the main constituent in mony furms o plaister an is widely mined. A very fine-grained white or lichtly tinted variety o gypsum, cried alabast, haes been uised for sculpture bi mony culturs includin Auncient Egyp, Mesopotamie an the Nottingham ...

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  • Kids Love Rocks - Crystals

    The seven crystal systems are: The Orthorhombic System includes the minerals aragonite, barite, celestite, goethite, and marcasite. The Monoclinic System includes the minerals gypsum, augite, biotite, epidote, and hornblende. The Triclinic System includes the minerals plagioclase feldspar, ulexite, turquoise, and albite.

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  • A Comparison of Properties of FGD and Natural Gypsum .

    A Comparison of Properties of FGD & Natural Gypsum Products Debra F. Pflughoeft-Hassett, David J. Hassett,& Kurt Eylands Energy & Environmental Research Center Agricultural & Industrial Uses of FGD Gypsum Workshop October 23, 2007 Atlanta, Georgia

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  • Gypsum — GMSS

    Apr 24, 2014· Gypsum is monoclinic, usually forming tabular prisms. The crystal structure is oriented such that CaSo 4 molecules alternate with H 2 O in only one dimension. This results in the sheet-like nature of Selenite and the fibrous texture of Satin Spar.

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  • Gypsum - definition of gypsum by The Free Dictionary

    calcium sulfate, calcium sulphate - a white salt (CaSO4) plaster of Paris, plaster - any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs.

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  • Gypsum CaSO4 2H2O - Handbook of Mineralogy

    Gypsum CaSO4• 2H2O c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic. Point Group: 2/m. As acicular to stubby prismatic crystals, thin to thick tabular on {010}, typically exhibiting {010}, {011}, {110}, {111}, {103}, with more than 20 other forms noted, coarsely striated k [001], to 17 m; lenticular in rosettes, may be ...

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  • Monoclinic crystal system | Earth Sciences Museum ...

    Monoclinic crystal system In the monoclinic system all the axes are different lengths. Two of them, the A and the C axes, meet at 90 degrees but the third one does not.

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  • Gypsum | Minerals Education Coalition

    Minerals Database. Gypsum. Gypsum is a mineral found in crystal as well as masses called gypsum rock. It is a very soft mineral and it can form very pretty, and sometimes extremely large colored crystals. Massive gypsum rock forms within layers of sedimentary rock, typically found in thick beds or layers.

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  • Iran Gypsum producer, supplier and exporter - MGT MINERAL

    Gypsum (Calcium sulfate) is recognized is acceptable for using as a dietary source of calcium, to condition water used in brewing beer, to control the clarity and tartness of wine, and as an ingredient in flour, white bread, ice cream, blue cheese, canned vegetables, and other foods.

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  • OPTICAL MINERALOGY - University of Hawaii at Hilo

    The slower the slow, the high order the colors. The microscope is setup so that the slow ray of gypsum is oriented in NE-SW direction as well. If the slow ray of the mineral is parallel to the elongation (usually the c-axis) the gypsum plate slows it even more and causes HIGHER ORDER COLORS (slow .

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  • Amethyst Galleries - THE MONOCLINIC SYSTEM

    The Prismatic Class. Common Forms: The monoclinic prism and the pinacoid . Most Common Minerals Known to this Class: This is the largest symmetry class in terms of the number of minerals with almost eleven hundred recognized members. Some of the more noteworthy members are Acanthite, actinolite, aegirine, allanite, annabergite, arfvedsonite,...

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  • Gypsum - Mineral and Healing Properties

    Gypsum was used by Native Americans as long ago as 3000 years for the white pigments, which they used for decorating pottery, teepees, body paint, and shields. Egyptians used gypsum as jointing material in the monuments they built over 5000 years ago. Gypsum crystals can be extremely large - among the largest on the entire planet.

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  • Gypsum - The Full Wiki

    Gypsum crystallizes in the monoclinic system, the habit of the crystals being usually either prismatic or tabular; in the latter case the broad planes are parallel to the faces of the clinopinacoid. The crystals may become lenticular by curvature of certain faces. In the characteristic type represented in fig.

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  • Elastic Constants and Homogenized Moduli of Monoclinic ...

    The gypsum morphology is monoclinic, and the initial lattice is as a = 5.677Å, b = 15.207Å, c = 6.528Å, α = β = 90°, and γ = 118.49°, its structure is monoclinic with space group I 2/a .

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  • Gypsum - Saltwiki

    Gypsum crystals belong to the class of monoclinic crystals. Thus, they show, depending on the orientation of the single particle under the microscope, a parallel or respectively a symmetrical extinction, but mainly exhibit a characteristicly oblique axis position in the extinction position.

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  • Electron Backscatter Diffraction (EBSD) Analysis of ...

    et al., 2008).The dehydration of a gypsum single crystal to a-bassanite is said to be a topotactic solid-state reaction that takes place with the retention of the crystallographic c-axis (in a monoclinic setting), but dehydration of a gypsum aggregate results in growth and nucleation of a-bassanite on parent gypsum without directional correl-

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