File:Stibnite (Baia Sprie, Maramures, Romania) 3.jpg
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Summary
[edit]DescriptionStibnite (Baia Sprie, Maramures, Romania) 3.jpg |
English: Stibnite mass from Romania. (7.7 centimeters long)
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 6000 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 sulfide minerals contain one or more sulfide anions (S-2). The sulfides are usually considered together with the arsenide minerals, the sulfarsenide minerals, and the telluride minerals. Many sulfides are economically significant, as they occur commonly in ores. The metals that combine with S-2 are mainly Fe, Cu, Ni, Ag, etc. Most sulfides have a metallic luster, are moderately soft, and are noticeably heavy for their size. These minerals will not form in the presence of free oxygen. Under an oxygen-rich atmosphere, sulfide minerals tend to chemically weather to various oxide and hydroxide minerals. Stibnite is an antimony sulfide mineral (Sb2S3). Stibnite is distinctive in forming long, slender crystals having a metallic luster, silvery-gray color, and a dark gray streak. It is fairly soft on the Mohs Hardness Scale - H=2, Stibnite has economic value - it’s mined in several parts of the world for antimony (Sb). The most significant modern source of stibnite specimens is South China. Geologic context & age: Inner Carpathian Volcanic Belt, Miocene-Pliocene Locality: Baia Sprie, Maramures, northern Romania Photo gallery of stibnite: www.mindat.org/gallery.php?min=3782 |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/53527868305/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/53527868305. It was reviewed on 26 March 2024 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
26 March 2024
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current | 19:11, 26 March 2024 | 3,420 × 849 (1.92 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53527868305/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/11 |
ISO speed rating | 80 |
Date and time of data generation | 15:50, 9 February 2024 |
Lens focal length | 11.614 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 20.0 (Macintosh) |
File change date and time | 06:20, 13 February 2024 |
Exif version | 2.21 |
Date and time of digitizing | 15:50, 9 February 2024 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 01:20, 13 February 2024 |
Unique ID of original document | 5AA7B97C2917DD2DF950E6021303FD95 |
IIM version | 2 |