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Thermal Valley
The Thermal Valley () is a valley located on the foothill of Yangmingshan National Park in Beitou District, Taipei, Taiwan. This makes Thermal Valley one of the sources of acidic sulfur hot spring in the area. Locals also sometimes refer to it as Hell Valley. The formula of this mineral water contains Plaster, Alunite, Jarosite, Realgar, Sulfur, and Radium. pH value is between 1.4~1.6, the highest temperature could be reached to 90 Celsius. It was one of the eight attractions and twelve scenic spots in Taiwan during the Japanese colonial period. Access Thermal Valley is accessible within walking distance east from Xinbeitou Station of the Taipei Metro. See also * Beitou Hot Spring Museum * Taiwanese hot springs Taiwan is part of the collision zone between the Yangtze Plate and Philippine Sea Plate. Eastern and southern Taiwan are the northern end of the Philippine Mobile Belt. Located next to an oceanic trench and volcanic system in a tectonic collisi ... References Ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beitou District
Beitou District is the northernmost of the twelve districts of Taipei City, Taiwan. The historical spelling of the district is Peitou. The name originates from the Ketagalan word ''Kipatauw'', meaning witch. Beitou is the most mountainous and highest of Taipei's districts, encompassing a meadow with rivers running through the valley which have abundant steam rising from them; the result of geothermal warming. The valley is often surrounded by mist shrouding the trees and grass. Beitou is famous for its hot springs. In March 2012, it was named one of the ''Top 10 Small Tourist Towns'' by the Tourism Bureau of Taiwan. History The area's hot springs had long been enjoyed by the aboriginal people of Taiwan. Shortly before the Japanese period a German sulfur merchant established the first hot spring club in Beitou. During early Japanese rule, ''Hokutō'' () was a village at the entrance of the well-known North Formosa sulfur district. Three Japanese extracting plants in this d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jarosite
Jarosite is a basic hydrous sulfate of potassium and ferric iron (Fe-III) with a chemical formula of KFe3(SO4)2(OH)6. This sulfate mineral is formed in ore deposits by the oxidation of iron sulfides. Jarosite is often produced as a byproduct during the purification and refining of zinc and is also commonly associated with acid mine drainage and acid sulfate soil environments. Physical properties Jarosite has a trigonal crystal structure and is brittle, with basal cleavage, a hardness of 2.5-3.5, and a specific gravity of 3.15-3.26. It is translucent to opaque with a vitreous to dull luster, and is colored dark yellow to yellowish-brown. It can sometimes be confused with limonite or goethite with which it commonly occurs in the gossan (oxidized cap over an ore body). Jarosite is an iron analogue of the potassium aluminium sulfate, alunite. Solid solution series The alunite supergroup includes the alunite, jarosite, beudantite, crandallite and florencite subgroups. The aluni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beitou Hot Spring Museum
The Beitou Hot Spring Museum () is a museum about hot spring in Beitou Park, Beitou District, Taipei, Taiwan. History The construction of the building started in 1911 and completed in 1913 during the Japanese rule of Taiwan. It was initially built as Hokutō Public Bathhouse, the largest bathhouse in East Asia at that time. After the handover of Taiwan from Japan to the Republic of China in 1945, the facility underwent several transformations, from police station, Kuomintang headquarter, to a reception house for local county administration called the Zhongshan House. However, the building was eventually closed and abandoned due to the corrosion caused by the hot springs and lack of proper maintenance. The building was declared a class 3 historical site by the Ministry of the Interior in February 1995. In March 1998, an overall makeover was initiated and completed with the official opening on 31 October 1998 as Beitou Hot Spring Museum. Architecture The museum is a Victoria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taipei Metro
Taipei Mass Rapid Transit (MRT), branded as Metro Taipei, is a rapid transit system serving the areas of Taipei and New Taipei City, New Taipei in Taiwan, operated by the State-owned enterprise, government-owned Taipei Rapid Transit Corporation, which also operates the Maokong Gondola. Taipei Metro was the first metro system ever built in Taiwan. The initial network was approved for construction in 1986 and work began two years later. It began operations on March 28, 1996, and by 2000, 62 stations were in service across three main lines. Over the next nine years, the number of passengers had increased by 70%. Since 2008, the network has expanded to 131 stations and the passenger count has grown by another 66%. The system has been praised by locals for its effectiveness in relieving growing traffic congestion in Taipei and its surrounding satellite towns, with over two million trips made daily. History Proposal and construction The idea of constructing the Taipei Metro was fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xinbeitou Station
The Taipei Metro Xinbeitou station (formerly transliterated as Hsin Peitou Station from 1997 until 2003) is the terminal station on the Xinbeitou branch line located in Beitou District, Taipei, Taiwan. The location of the station used to be the terminal station for the now-defunct TRA Xinbeitou Line. Station overview The two-level, elevated station features an island platform and two exits. The station is known for being the closest to the Beitou hot springs, such as Beitou Hot Spring Museum, Beitou Plum Garden, Ketaglan Culture Center, Beitou Hot Springs, Beitou Park and Sushi Express restaurant. History The station originally opened as the terminus for the Shin-hokutō Line as on 1 April 1916. It reopened on 1937 after renovation. The station and the tracks form a unique "T" configuration. Later on, on 15 July 1988, the service was ceased with the discontinuation of Tamsui and Hsin Peitou Line. Station layout After termination of TRA services, the original station build ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium
Radium is a chemical element with the symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra3N2). All isotopes of radium are radioactive, the most stable isotope being radium-226 with a half-life of 1600 years. When radium decays, it emits ionizing radiation as a by-product, which can excite fluorescent chemicals and cause radioluminescence. Radium, in the form of radium chloride, was discovered by Marie and Pierre Curie in 1898 from ore mined at Jáchymov. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days later. Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne through the electrolysis of radium chloride in 1911. In nature, radium is found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur
Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most abundant element by mass in the universe and the fifth most on Earth. Though sometimes found in pure, native form, sulfur on Earth usually occurs as sulfide and sulfate minerals. Being abundant in native form, sulfur was known in ancient times, being mentioned for its uses in ancient India, ancient Greece, China, and ancient Egypt. Historically and in literature sulfur is also called brimstone, which means "burning stone". Today, almost all elemental sulfur is produced as a byproduct of removing sulfur-containing contaminants from natural gas and petroleum.. Downloahere The greatest commercial use of the element is the production o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Realgar
Realgar ( ), also known as "ruby sulphur" or "ruby of arsenic", is an arsenic sulfide mineral with the chemical formula α-. It is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related mineral, orpiment (). It is orange-red in color, melts at 320 °C, and burns with a bluish flame releasing fumes of arsenic and sulfur. Realgar is soft with a Mohs hardness of 1.5 to 2 and has a specific gravity of 3.5. Its streak is orange colored. It is trimorphous with pararealgar and bonazziite. Its name comes from the Arabic ''rahj al-ġār'' (, "powder of the mine"), via Medieval Latin, and its earliest record in English is in the 1390s. Uses Realgar is a minor ore of arsenic extracted in China, Peru, and the Philippines. Historical uses Realgar was used by firework manufacturers to create the color white in fireworks prior to the availability of powdered metals such as aluminium, magnesium and titani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alunite
Alunite is a hydroxylated aluminium potassium sulfate mineral, formula K Al3( S O4)2(O H)6. It was first observed in the 15th century at Tolfa, near Rome, where it was mined for the manufacture of alum. First called ''aluminilite'' by J.C. Delamétherie in 1797, this name was contracted by François Beudant three decades later to alunite. Alunite crystals morphologically are rhombohedron, rhombohedra with interfacial angles of 90° 50', causing them to resemble cubes. Crystal symmetry is trigonal. Minute glistening crystals have also been found loose in cavities in altered rhyolite. Alunite varies in color from white to yellow gray. The hardness on the Mohs scale is 4 and the specific gravity is between 2.6 and 2.8. It is insoluble in water or weak acids, but soluble in sulfuric acid. Sodium can substitute for potassium in the mineral, and when the sodium content is high, is called natroalunite. Alunite is an analog of jarosite, where aluminium replaces Fe3+. Alunite o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taipei
Taipei (), officially Taipei City, is the capital and a special municipality of the Republic of China (Taiwan). Located in Northern Taiwan, Taipei City is an enclave of the municipality of New Taipei City that sits about southwest of the northern port city of Keelung. Most of the city rests on the Taipei Basin, an ancient lakebed. The basin is bounded by the relatively narrow valleys of the Keelung and Xindian rivers, which join to form the Tamsui River along the city's western border. The city of Taipei is home to an estimated population of 2,646,204 (2019), forming the core part of the Taipei–Keelung metropolitan area, which includes the nearby cities of New Taipei and Keelung with a population of 7,047,559, the 40th most-populous urban area in the world—roughly one-third of Taiwanese citizens live in the metro district. The name "Taipei" can refer either to the whole metropolitan area or just the city itself. Taipei has been the seat of the ROC central government ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plaster
Plaster is a building material used for the protective or decorative coating of walls and ceilings and for Molding (decorative), moulding and casting decorative elements. In English, "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. Another imprecise term used for the material is stucco, which is also often used for plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces. The most common types of plaster mainly contain either gypsum, lime plaster, lime, or cement plaster, cement,Franz Wirsching "Calcium Sulfate" in Ullmann's Encyclopedia of Industrial Chemistry, 2012 Wiley-VCH, Weinheim. but all work in a similar way. The plaster is manufactured as a dry powder and is mixed with water to form a stiff but workable paste immediately before it is applied to the surface. The reaction with water liberates heat through crystallization and the hydrated plaster then ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 circulation through faults to hot rock deep in the Earth's crust. In either case, the ultimate source of the heat is radioactive decay of naturally occurring radioactive elements in the Earth's mantle, the layer beneath the crust. Hot spring water often contains large amounts of dissolved minerals. The chemistry of hot springs ranges from acid sulfate springs with a pH as low as 0.8, to alkaline chloride springs saturated with silica, to bicarbonate springs saturated with carbon dioxide and carbonate minerals. Some springs also contain abundant dissolved iron. The minerals brought to the surface in hot springs often feed communities of extremophiles, microorganisms adapted to extreme conditions, and it is possible that life on Earth had its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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