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Paulingite
Paulingite or paulingite-K is a rare zeolite mineral that is found in vesicles in the basaltic rocks from the Columbia River near Rock Island Dam, Washington. Paulingite was named for Linus Carl Pauling (1901–1994), professor of chemistry, California Institute of Technology and accepted by the International Mineralogical Association in 1960. The early formation in the crystallization sequence and the high water content suggest that paulingite forms from relatively dilute pore fluids. They have a large unit cell of 3.51 nanometers and an isometric crystal system. This is the largest known inorganic unit cell apart from protein structures. Paulingite's characteristic structure can be observed while the remaining water content decomposes. A single crystal X-ray refinement of this chemically different sample material derived three main cation positions, which are inside a so-called paulingite or Calcium (Ca), between 8-rings of neighbouring Barium (Ba), and in the centre of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeolite
Zeolites are microporous, crystalline aluminosilicate materials commonly used as commercial adsorbents and catalysts. They mainly consist of silicon, aluminium, oxygen, and have the general formula ï½¥y where is either a metal ion or H+. These positive ions can be exchanged for others in a contacting electrolyte solution. exchanged zeolites are particularly useful as solid acid catalysts. The term ''zeolite'' was originally coined in 1756 by Swedish mineralogist Axel Fredrik Cronstedt, who observed that rapidly heating a material, believed to have been stilbite, produced large amounts of steam from water that had been adsorbed by the material. Based on this, he called the material ''zeolite'', from the Greek , meaning "to boil" and , meaning "stone". Zeolites occur naturally but are also produced industrially on a large scale. , 253 unique zeolite frameworks have been identified, and over 40 naturally occurring zeolite frameworks are known. Every new zeolite structure that is ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeolite
Zeolites are microporous, crystalline aluminosilicate materials commonly used as commercial adsorbents and catalysts. They mainly consist of silicon, aluminium, oxygen, and have the general formula ï½¥y where is either a metal ion or H+. These positive ions can be exchanged for others in a contacting electrolyte solution. exchanged zeolites are particularly useful as solid acid catalysts. The term ''zeolite'' was originally coined in 1756 by Swedish mineralogist Axel Fredrik Cronstedt, who observed that rapidly heating a material, believed to have been stilbite, produced large amounts of steam from water that had been adsorbed by the material. Based on this, he called the material ''zeolite'', from the Greek , meaning "to boil" and , meaning "stone". Zeolites occur naturally but are also produced industrially on a large scale. , 253 unique zeolite frameworks have been identified, and over 40 naturally occurring zeolite frameworks are known. Every new zeolite structure that is ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portrush
Portrush () is a small seaside resort town on the north coast of County Antrim, Northern Ireland. It neighbours the resort of Portstewart. The main part of the old town, including the Portrush railway station, railway station as well as most hotels, restaurants and bars, is built on a –long peninsula, Ramore Head. It had a population of 6,454 people at the United Kingdom Census 2011, 2011 Census. In the off-season, Portrush is a dormitory town for the nearby campus of the University of Ulster at Coleraine. The town is well known for its three sandy beaches, the West Strand, East Strand and White Rocks, as well as the Royal Portrush Golf Club, the only golf club outside Great Britain which has hosted The Open Championship in 1951 Open Championship, 1951 and 2019 Open Championship, 2019. History A number of flint tools found during the late 19th century show that the site of Portrush was occupied during the "Larnian" (late Irish Mesolithic) period; recent estimates date this t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falkland, British Columbia
Falkland is an unincorporated community located in the Columbia-Shuswap Regional District of British Columbia, Canada between Vernon and Kamloops. Falkland is recognized for one of Canada's largest Canadian flags, which is located on Gyp Mountain and can be seen up to away. The Falkland area has a wide array of lakes for fishing and recreation. Also on the Victoria Day holiday, the Falkland Stampede begins. The Falkland Stampede is one of Canada's oldest stampedes. Town history The members of the Salish tribes frequently stayed in the Slahaltkan during the summer to gather the tribe's food for the winter. It was the job of the women to prepare the fish and meat for drying beside the fire. Where to put the meat caused slight disagreement among the women because the ever-changing breeze would cause the wind to blow in changing directions. Thus the valley was named "Slahaltkan", meaning "Meeting of the winds". The name Slahaltkan was never used among the people who eventuall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritter, Oregon
Ritter is an unincorporated community in Grant County, Oregon, United States, ten miles down the Middle Fork John Day River from U.S. Route 395, between Dale and Long Creek. At one time the locale was also known as Ritter Hot Springs. When a post office was established in this locale, it was named for the Rev. Joseph Ritter, a pioneer Baptist minister of the John Day Valley, on whose ranch it was situated. The post office was originally near the mineral hot spring A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma (molten rock) or by circ ...s there, formerly known as McDuffee Hot Springs but now known as Ritter Hot Springs. In 1988, the post office had moved to the old schoolhouse across the river. As of 2009, Ritter no longer has its own post office; Ritter's mail is addressed to Long Creek. The springs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Riggins, Idaho
Riggins is a city in the western United States in Idaho County, Idaho. Nestled deep in a canyon at the confluence of the Salmon and Little Salmon rivers in west central Idaho, it is approximately north of Boise, and south-southeast of Lewiston. The elevation is above sea level, and its population was 419 at the 2010 census. U.S. Route 95, the only highway for the state connecting the Panhandle to the south, runs through Riggins as Main Street. Along this route, Riggins is the most northwestern town in the Mountain time zone; Pacific time begins just north of the city, across the Salmon River. History Riggins was named for Richard L. Riggins, local businessman and postmaster, and for his father, Fred Riggins, who carried the mail to the area for years. A sawmill was formerly operated in Riggins, until an explosion and fire in 1982. Geography Riggins is located at (45.422125, -116.315848). According to the United States Census Bureau, the city has a total area of , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wenatchee, Washington
Wenatchee ( ) is the county seat and largest city of Chelan County, Washington, United States. The population within the city limits in 2010 was 31,925, and was estimated to have increased to 34,360 as of 2019. Located in the north-central part of the state, at the confluence of the Columbia and Wenatchee rivers near the eastern foothills of the Cascade Range, Wenatchee lies on the western side of the Columbia River, across from the city of East Wenatchee. The Columbia River forms the boundary between Chelan and Douglas County. Wenatchee is the principal city of the Wenatchee–East Wenatchee, Washington Metropolitan Statistical Area, which encompasses all of Chelan and Douglas counties (total population around 110,884). However, the "Wenatchee Valley Area" generally refers to the land between Rocky Reach and Rock Island Dam on both banks of the Columbia, which includes East Wenatchee, Rock Island, and Malaga. The city was named for the nearby Wenatchi Indian tribe. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giants Causeway
The Giant's Causeway is an area of about 40,000 interlocking basalt columns, the result of an ancient volcanic fissure eruption. It is located in County Antrim on the north coast of Northern Ireland, about three miles (5 km) northeast of the town of Bushmills. It was declared a World Heritage Site by UNESCO in 1986 and a national nature reserve by the Department of the Environment for Northern Ireland in 1987. In a 2005 poll of ''Radio Times'' readers, the Giant's Causeway was named the fourth-greatest natural wonder in the United Kingdom. The tops of the columns form stepping stones that lead from the cliff foot and disappear under the sea. Most of the columns are hexagonal, although some have four, five, seven or eight sides. The tallest are about 12 metres (39 ft) high, and the solidified lava in the cliffs is 28 metres (92 ft) thick in places. Much of the Giant's Causeway and Causeway Coast World Heritage Site is owned and managed by the Natio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squaw Creek Zeolite Occurrence
The English word ''squaw'' is an ethnic and sexual slur, historically used for Indigenous North American women. Contemporary use of the term, especially by non-Natives, is considered derogatory, misogynist, and racist.King, C. Richard,De/Scribing Squ*w: Indigenous Women and Imperial Idioms in the United States in the ''American Indian Culture and Research Journal'', v27 n2 p1-16 2003. Accessed Oct. 9, 2015 While the morpheme ''squaw'' (or a close variant) is found within longer words in several Eastern and Central Algonquian languages, primarily spoken in the northeastern United States and in eastern and central Canada, these languages only make up a small minority of the Indigenous languages of North America. The word "squaw" is not used among Native American, First Nations, Inuit, or Métis peoples. Even in Algonquian, the related morphemes used are not the English-language slur, but only a component part of longer Algonquian words that contain more than one morpheme. Curr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basalt
Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial planet, rocky planet or natural satellite, moon. More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes per year. Basalt is also an important rock type on other planetary bodies in the Solar System. For example, the bulk of the plains of volcanism on Venus, Venus, which cover ~80% of the surface, are basaltic; the lunar mare, lunar maria are plains of flood-basaltic lava flows; and basalt is a common rock on the surface of Mars. Molten basalt lava has a low viscosity due to its relatively low silica content (between 45% and 52%), resulting in rapidly moving lava flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Refractive Index
In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium. The refractive index determines how much the path of light is bent, or refracted, when entering a material. This is described by Snell's law of refraction, , where ''θ''1 and ''θ''2 are the angle of incidence and angle of refraction, respectively, of a ray crossing the interface between two media with refractive indices ''n''1 and ''n''2. The refractive indices also determine the amount of light that is reflected when reaching the interface, as well as the critical angle for total internal reflection, their intensity ( Fresnel's equations) and Brewster's angle. The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is , and similarly the wavelength in that medium is , where ''Π... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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