Quartz avec une mince feuille de mica : 無料・フリー素材/写真
Quartz avec une mince feuille de mica / Charles de Mille-Isles
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | wikipedia Flake mica comes from several sources: the metamorphic rock called schist as a byproduct of processing feldspar and kaolin resources, from placer deposits, and from pegmatites. Sheet mica is considerably less abundant than flake and scrap mica, and is occasionally recovered from mining scrap and flake mica. The most important sources of sheet mica are pegmatite deposits. Sheet mica prices vary with grade and can range from less than $1 per kilogram for low-quality mica to more than $2,000 per kilogram for the highest quality.The commercially important micas are muscovite and phlogopite, which are used in a variety of applications. Mica’s value is based on several of its unique physical properties. The crystalline structure of mica forms layers that can be split or delaminated into thin sheets. These sheets are chemically inert, dielectric, elastic, flexible, hydrophilic, insulating, lightweight, platy, reflective, refractive, resilient, and range in opacity from transparent to opaque. Mica is stable when exposed to electricity, light, moisture, and extreme temperatures. |
| 撮影日 | 2011-11-30 17:47:21 |
| 撮影者 | Charles de Mille-Isles |
| タグ | |
| 撮影地 | |
| カメラ | Canon PowerShot S95 , Canon |
| 露出 | 0.01 sec (1/100) |
| 開放F値 | f/5.6 |
| 焦点距離 | 6 mm |