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1. museum.wales · databaseMineral Database - Mineralogy of Wales - Museum Wales

   museum.wales · database

   

   Key Localities: Frongoch Mine, Devil's Bridge, Ceredigion: identified on specimens collected from the extensive dumps as minute (<0.3 mm) yellowish-green to olive-green rhombic crystals on goethite-coated quartz (Cotterell and Todhunter, 2007).

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4. geologyscience.com · minerals · oxides-mineralsGoethite : Properties, Formation, Uses and Mining Locations

   geologyscience.com · minerals · oxides-minerals

   

   Aug 29, 2023 · Goethite typically crystallizes in the orthorhombic crystal system, forming prismatic or needle-like crystals, as well as in massive, botryoidal (globular), stalactitic, or earthy forms. Its color can range from yellow-brown to dark brown, and it often exhibits a characteristic dull or earthy luster.

5. en.wikipedia.org · wiki · CorkiteCorkite - Wikipedia

   en.wikipedia.org · wiki · Corkite

   

   Corkite is a phosphate mineral in the beudantite subgroup of the alunite group. Corkite is the phosphate analogue of beudantite and with it, a complete solid solution range exists. Corkite will also form a solid solution with kintoreite.

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7. www.mindat.org · min-1719Goethite: Mineral information, data and localities. - mindat.org

   www.mindat.org · min-1719

   

   Formula: α-Fe3+O (OH) Colour: Brownish black, yellow-brown, reddish brown. Lustre: Adamantine, Silky, Metallic, Dull. Hardness: 5 - 5½. Specific Gravity: 4.27 - 4.29. Crystal System: Orthorhombic. Member of: Diaspore Group. Name:

8. rockseeker.com · goethite-formationGoethite: Formation, Characteristics and Identification

   rockseeker.com · goethite-formation

   

   Jun 7, 2024 · Goethite has a Mohs hardness of 5 to 5.5, which makes it relatively soft but still significant for its use in pigments and as an iron ore. Historically, it has been used as a raw material for ochre pigments in art and decoration.

9. www.mindat.org · min-1130Corkite: Mineral information, data and localities. - mindat.org

   www.mindat.org · min-1130

   

   Formula: PbFe3(PO4) (SO4) (OH)6. Colour: Brown to light yellowish brown, pale yellow, yellowish green to dark green. Lustre: Vitreous, Sub-Vitreous, Resinous, Waxy, Greasy. Hardness: 3½ - 4½. Specific Gravity: 4.295. Crystal System:

10. People also ask

    What is rhombic Corkite on goethite?

    • Scanning electron micrograph of rhombic corkite crystals on goethite from Frongoch Mine. National Museum of Wales Collection (NMW 2005.10G.M.1). © National Museum of Wales. Introduction: corkite is a rare secondary species typically found within phosphate-dominated secondary mineral assemblages, particularly associated with lead-rich orebodies.

    Mineral Database - Mineralogy of Wales | Museum Wales

    museum.wales/mineralogy-of-wales/database/?mineral=388&name=Corkite

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    What type of rhombohedral is Corkite?

    • Crystals pseudocubic rhombohedral with prominent {10 1 1}. Commonly in crusts and massive Corkite is a phosphate mineral in the beudantite subgroup of the alunite group. Corkite is the phosphate analogue of beudantite and with it, a complete solid solution range exists. Corkite will also form a solid solution with kintoreite .

    Corkite - Wikipedia

    en.wikipedia.org/wiki/Corkite

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    What does goethite look like?

    • Goethite typically crystallizes in the orthorhombic crystal system, forming prismatic or needle-like crystals, as well as in massive, botryoidal (globular), stalactitic, or earthy forms. Its color can range from yellow-brown to dark brown, and it often exhibits a characteristic dull or earthy luster.

    Goethite : Properties, Formation, Uses and Mining Locations

    geologyscience.com/minerals/oxides-minerals/goethite/

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    How hard is goethite?

    • Hardness: Goethite has a hardness of about 5.0 to 5.5 on the Mohs scale. It can scratch materials with a lower hardness but can be scratched by materials with higher hardness. Crystal Structure: Goethite crystallizes in the orthorhombic crystal system. Its crystals are often prismatic or needle-like in shape.

    Goethite : Properties, Formation, Uses and Mining Locations

    geologyscience.com/minerals/oxides-minerals/goethite/

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    Is Corkite a phosphate variant of Beudantite?

    • Corkite: Mineral information, data and localities. Named in 1869 by Gilbert-Joseph Adam after the first occurrence at County Cork, Ireland. Corkite is the phosphate analogue of beudantite with which a complete solid-solution range exists. The ferric iron analogue of hinsdalite. Also forms a solid solution with kintoreite.

    Corkite: Mineral information, data and localities. - mindat.org

    www.mindat.org/min-1130.html

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    Where is Corkite found?

    • Occurrence in Wales: corkite has only recently been discovered in Wales (Cotterell and Todhunter, 2007) forming, minute euhedral crystals in iron stained quartz veinstone from Frongoch mine, in the Central Wales Orefield. Only a very small number of specimens are known, but this reflects the inconspicuous nature of this species.

    Mineral Database - Mineralogy of Wales | Museum Wales

    museum.wales/mineralogy-of-wales/database/?mineral=388&name=Corkite

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11. en.wikipedia.org · wiki · GoethiteGoethite - Wikipedia

    en.wikipedia.org · wiki · Goethite

    

    Goethite is an iron oxyhydroxide containing ferric iron. It is the main component of rust and bog iron ore. Goethite's hardness ranges from 5.0 to 5.5 on the Mohs Scale, and its specific gravity varies from 3.3 to 4.3. The mineral forms prismatic needle-like crystals ("needle ironstone" [3]) but is more typically massive.