- Feldspar - Encyclopedia. com
Feldspar Feldspar is the most common mineral on Earth [1], constituting approximately 60% of the crust It forms directly from cooling magma and is a major component of granite and most other igneous rocks
- Feldspars - Encyclopedia. com
feldspars The most important group of rock-forming silicate minerals, including the alkali feldspars KAlSi 3 O 8 to NaAlSi 3 O 8 (K-feldspar to albite) and the plagioclase feldspars NaAlSi 3 O 8 to CaAl 2 Si 2 O 8 (albite to anorthite)
- Plagioclases - Encyclopedia. com
Plagioclase Plagioclase is a form of the mineral feldspar All feldspars are crystals of aluminum, oxygen , and silicon , plus a major additive In the case of plagioclase, the additive is calcium, sodium, or a blend of both Miscellaneous impurities may also be present
- Granite - Encyclopedia. com
Granite, which makes up 70 – 80% of Earth's crust, is an igneous rock formed of interlocking crystals of quartz, feldspar, mica, and other minerals in lesser quantities Large masses of granite are a major ingredient of mountain ranges Granite is a plutonic rock, meaning that it forms deep underground
- Alkali Feldspar - Encyclopedia. com
alkali feldspar A group of silicate minerals that contain the alkali metal elements potassium and sodium The normal feldspar minerals (including the calcium-bearing varieties) can be plotted on a chemical basis into a triangle which has KAlSi 3 O 8 (potassium feldspar, sanidine, orthoclase (Or), or microcline), NaAlSi 3 O 8 (sodium feldspar, albite, or Ab), and CaAl 2 Si 2 O 8 (calcium
- albitization | Encyclopedia. com
albitization The partial or complete replacement of pre-existing plagioclase feldspar or alkali feldspar by albite There are a number of ways in which this can be achieved A common process involves the residual water-rich vapour released during the final stages of crystallization of a granite body
- Coal Washing - Encyclopedia. com
In some cases, a liquid other than water may be used to achieve this separation In a heavy medium bath, for example, a mineral such as magnetite or feldspar in finely divided form may be mixed with water, forming a liquid medium whose density is significantly greater than that of pure water
- Sodium Chloride - Encyclopedia. com
Sodium Chloride Properties Bonds Location and processing Mining Evaporation Uses Resources Sodium chloride (chemical formula NaCl), known as table salt, rock salt, sea salt, and the mineral halite, is an ionic compound consisting of cube-shaped crystals composed of the elements sodium and chlorine
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