Chrysotile 1 : 無料・フリー素材/写真
Chrysotile 1 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Chrysotile is a serpentine-group mineral having the formula Mg3Si2O5(OH)4 - magnesium hydroxy-silicate. It has a greenish to yellowish-brown to whitish color, a nonmetallic, silky luster, a white streak, is moderately soft (about 2.5 on the Mohs Hardness Scale), and has a fibrous fracture - the fibers are flexible. Chrysotile is often referred to as "white asbestos".Chrysotile is a component of many serpentinites, a light green to dark green to blackish colored metamorphic rock. Serpentinites form by metamorphism of olivine-rich peridotites in the presence of water. If chrysotile is present, it's often in the form of "veins" - fractures subsequently filled with white asbestos fibers. This type of occurrence has been called "vein serpentinite" (e.g., Coleman, 1971).------------------------------Reference cited:Coleman (1971) - Petrologic and geophysical nature of serpentinites. Geological Society of America Bulletin 82: 897-918. |
| 撮影日 | 2021-05-15 22:21:22 |
| 撮影者 | James St. John |
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