File:Skutterudite Bou Azzer-El Graara Ophiolite; Tamdrost Mine, Maroc.jpg
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[edit]DescriptionSkutterudite Bou Azzer-El Graara Ophiolite; Tamdrost Mine, Maroc.jpg |
Skutterudite from Morocco. (field of view 4.4 cm across) A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates. The arsenide minerals contain one or more arsenide anions (As-3). The arsenides are usually considered together with the sulfide minerals, the sulfarsenide minerals, and the telluride minerals. Skutterudite is an uncommon cobalt-nickel arsenide mineral ((Co,Ni)As3). Skutterudite has a metallic luster, bright silvery color, black streak, no cleavage, moderate hardness (H = 5.5 to 6), and moderately high density. It can be an important ore mineral of cobalt and nickel, and is typically found in hydrothermal veins. The beautifully crystalline skutterudite shown above is from a cobalt-nickel mineralized vein in a fault system within the Bou Azzer-El Graara Ophiolite of Morocco. The ophiolite complex is Proterozoic in age, but the skutterudite mineralization postdates the host rocks. Locality: Tamdrost Mine, Bou Azzer Mining District, 30 km south of Tazenakht, central Anti-Atlas Mountains, central Morocco Photo gallery of skutterudite: www.mindat.org/gallery.php?min=3682 |
Date | |
Source | Skutterudite (vein in a fault system in the Bou Azzer-El Graara Ophiolite; Tamdrost Mine, Bou Azzer Mining District, Morocco) 2 |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/19245049335. It was reviewed on 28 June 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
28 June 2015
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current | 23:49, 28 June 2015 | ![]() | 2,467 × 1,644 (4.06 MB) | Tillman (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Horizontal resolution | 96 dpi |
Vertical resolution | 96 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 17:11, 28 June 2015 |
Y and C positioning | Centered |
Exif version | 2.21 |
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Supported Flashpix version | 1 |
Color space | sRGB |
Date and time of digitizing | 14:00, 31 December 1903 |
Date metadata was last modified | 13:11, 28 June 2015 |
Unique ID of original document | 86B3124201445AD5EF5B6A9F93FF3EDB |