Iron (Element # 26) 1 : 無料・フリー素材/写真
Iron (Element # 26) 1 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Iron (Fe) is # 26 on the Periodic Table of Elements. Elemental iron is a silvery-gray metal. In the presence of oxygen (O2), iron readily alters into various iron oxides. Iron in its elemental state is abundant in the cores of all terrestrial planets - Mercury, Venus, Earth, and Mars, plus the Moon. It is also a common component in the mantles and crusts of such worlds (e.g., olivine, pyroxene, amphibole, biotite mica). Iron occurs in numerous minerals. It is mined principally from iron oxides such as hematite (Fe2O3) and magnetite (Fe3O4). Most iron mines target iron-formation, an uncommon sedimentary deposit that includes many specific lithologies - most have been altered by metamorphism. Natually-occurring elemental iron is rare in crustal rocks. Famous examples include the "natural smelter" deposit at Disko Island, Greenland and native iron in some Siberian basalts of Permian-Triassic boundary age.Elemental iron is common in many meteorites, principally the iron meteorites (octahedrites, hexahedrites, and ataxites). They are fragments of core from now-disrupted differentiated bodies in the Asteroid Belt.Thirty-two isotopes of iron are known, five of which occur naturally. Iron-56 is the most common variety. Iron-54, iron-57, and iron-58 occur in minor to small amounts. Iron-60 is radioactive and only occurs in trace amounts.-----------------------------Info. at:en.wikipedia.org/wiki/Ironanden.wikipedia.org/wiki/Isotopes_of_ironandwww.flickr.com/photos/jsjgeology/albums/72157719858641270andwww.flickr.com/photos/jsjgeology/albums/72157716028732062andwww.flickr.com/photos/jsjgeology/albums/72157646887794646andwww.flickr.com/photos/jsjgeology/albums/72157652290446122andwww.flickr.com/photos/jsjgeology/albums/72157626914990739 |
| 撮影日 | 2024-09-28 12:33:58 |
| 撮影者 | James St. John |
| タグ | |
| 撮影地 |