Permeable feldspar is a kind of alkaline feldspar, potassium feldspar (potassium aluminosilicate, K[AlSi3O8]). It is a homomorphic variant of feldspar, also known as feldspar. Usually colorless, transparent like water. The optical axis angle, -2v = 20o ~ 30o, and some smaller, so close to a single crystal (and similar to the ice feldspar has a much larger optical axis angle, (2v = 60o ~ 80o). Stone is a crystallization that is crystallized under high temperature conditions and preserved under quenching conditions. It is mainly produced in acidic and alkaline effluent rocks. Some feldspars containing scaly metal minerals are the main source of solar stone gems. In addition, there are a few Transparent crystal, which can be used directly as a gemstone. Sometimes produced in surface rocks, colorless or white glassy transparent crystals in acidic volcanic rocks. Since the feldspar in the earth's crust is rapidly cooled (its structure is stable only above 700 ° C [1,300 ° F]), the aluminum atoms and silicon atoms are disorderly distributed in the crystal lattice. The various forms of potassium aluminosilicate have a complete orderly change, that is, a completely disordered distribution from high temperature feldspar (very high temperature form), through the feldspar, and then through the feldspar until the potassium is slightly slanted The stone is completely ordered. Perlite and albite can be replaced with each other to form various intermediate minerals, such as celsian feldspar. The name æªé•¿çŸ³ is used to refer to the intermediate member of the high-temperature albite-transparite series in which the content of potassium aluminosilicate is less than 40%. The feldspar is often crystalline and is produced in shale-rich volcanic rocks, such as southwestern Sicily. In the Antal lava of Pantelleria. Other places of origin are Tanzania, Kenya, Yellowstone National Park and Rhineland, Germany.
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