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Skuleboda
Skuleboda () was a quartz and feldspar mine near Vänersborg, in western Sweden. Mining at Skuleboda begun in 1927, then halted the same year and continued again from 1931 to 1934. The mined deposit is a pegmatite with a length of 45 m and a maximum width of 10 m. It contains amazonite feldspar. Rare occurrences of yttrotantalite has been found in the mined pegmatite. References {{Reflist 1927 establishments in Sweden 1934 disestablishments in Sweden Feldspar mines in Sweden Quartz mines in Sweden Vänersborg Municipality Former mines in Sweden Pegmatite mines 20th-century establishments in Älvsborg County ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazonite
Amazonite, also known as amazonstone, is a green tectosilicate mineral, a variety of the potassium feldspar called microcline. Its chemical formula is KAlSi3O8, which is Polymorphism (materials science), polymorphic to orthoclase. Its name is taken from that of the Amazon River, from which green stones were formerly obtained, though it is unknown whether those stones were amazonite. Although it has been used for jewellery for well over three thousand years, as attested by archaeological finds in Middle and New Kingdom Egypt and Mesopotamia, no ancient or medieval authority mentions it. It was first described as a distinct mineral only in the 18th century.Mikhail Ostrooumov, ''Amazonite: Mineralogy, Crystal Chemistry, and Typomorphism'' (Elsevier, 2016), p. 1–12. Green and greenish-blue varieties of potassium feldspars that are predominantly triclinic are designated as amazonite. It has been described as a "beautiful crystallized variety of a bright verdigris-green" and as posse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vänersborg Municipality
Vänersborg Municipality () is a municipalities of Sweden, municipality in Västra Götaland County in western Sweden. Its seat is located in the stad (Sweden), city of Vänersborg. The present municipality was created during the local government reform in the early 1970s. In 1971 the ''City of Vänersborg'' became a municipality of unitary type and three years later it was amalgamation (politics), amalgamated with three surrounding municipalities. The number of original local government entities (as of 1863) is eight. Localities *Brålanda, 1,500 inhabitants *Frändefors, 600 *Katrinedal, 300 *Nordkroken, 400 *Vargön, 5,000 *Vänersborg (seat), 22,000 Demographics This is a demographic table based on Vänersborg Municipality's electoral districts in the 2022 Swedish general election sourced from Swedish Television, SVT's election platform, in turn taken from Statistiska Centralbyrån, SCB official statistics. In total there were 39,574 residents, including 30,181 Swedish citi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Former Mines In Sweden
A former is an object, such as a template, gauge or cutting die, which is used to form something such as a boat's hull. Typically, a former gives shape to a structure that may have complex curvature. A former may become an integral part of the finished structure, as in an aircraft fuselage, or it may be removable, being used in the construction process and then discarded or re-used. Aircraft formers Formers are used in the construction of aircraft fuselage, of which a typical fuselage has a series from the nose cone to the empennage, typically perpendicular to the longitudinal axis of the aircraft. The primary purpose of formers is to establish the shape of the fuselage and reduce the column length of stringers to prevent instability. Formers are typically attached to longerons, which support the skin of the aircraft. The "former-and-longeron" technique (also called stations and stringers) was adopted from boat construction, and was typical of light aircraft built until t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz Mines In Sweden
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at . Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold. There are many different varieties of quartz, several of which are classified as gemstones. Since antiquity, varieties of quartz have been the most commonly used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feldspar Mines In Sweden
Feldspar ( ; sometimes spelled felspar) is a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagioclase'' (sodium-calcium) feldspars and the ''alkali'' (potassium-sodium) feldspars. Feldspars make up about 60% of the Earth's crust and 41% of the Earth's continental crust by weight. Feldspars crystallize from magma as both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar is known as anorthosite. Feldspars are also found in many types of sedimentary rocks. Etymology The name ''feldspar'' derives from the German , a compound of the words ' ("field") and ("flake"). had long been used as the word for "a rock easily cleaved into flakes"; was introduced in the 18th century as a more specific term, referring perhaps to its common occurrenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1934 Disestablishments In Sweden
Events January–February * January 1 – The International Telecommunication Union, a specialist agency of the League of Nations, is established. * January 15 – The 8.0 1934 Nepal–Bihar earthquake, Nepal–Bihar earthquake strikes Nepal and Bihar with a maximum Mercalli intensity scale, Mercalli intensity of XI (''Extreme''), killing an estimated 6,000–10,700 people. * February 6 – 6 February 1934 crisis, French political crisis: The French far-right leagues rally in front of the Palais Bourbon, in an attempted coup d'état against the French Third Republic, Third Republic. * February 9 ** Gaston Doumergue forms a new government in France. ** Second Hellenic Republic, Greece, Kingdom of Romania, Romania, Turkey and Kingdom of Yugoslavia, Yugoslavia form the Balkan Pact. * February 12–February 15, 15 – Austrian Civil War: The Fatherland Front (Austria), Fatherland Front consolidates its power in a series of clashes across the country. * February 16 – The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1927 Establishments In Sweden
Nineteen or 19 may refer to: * 19 (number) * One of the years 19 BC, AD 19, 1919, 2019 Films * ''19'' (film), a 2001 Japanese film * ''Nineteen'' (1987 film), a 1987 science fiction film * '' 19-Nineteen'', a 2009 South Korean film * '' Diciannove'', a 2024 Italian drama film informally referred to as "Nineteen" in some sources Science * Potassium, an alkali metal * 19 Fortuna, an asteroid Music * 19 (band), a Japanese pop music duo Albums * ''19'' (Adele album), 2008 * ''19'', a 2003 album by Alsou * ''19'', a 2006 album by Evan Yo * ''19'', a 2018 album by MHD * ''19'', one half of the double album '' 63/19'' by Kool A.D. * ''Number Nineteen'', a 1971 album by American jazz pianist Mal Waldron * ''XIX'' (EP), a 2019 EP by 1the9 Songs * "19" (song), a 1985 song by British musician Paul Hardcastle * "Stone in Focus", officially "#19", a composition by Aphex Twin * "Nineteen", a song from the 1992 album ''Refugee'' by Bad4Good * "Nineteen", a song from the 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pegmatite
A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than and sometimes greater than . Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite. However, rarer intermediate composition and mafic pegmatites are known. Many of the world's largest crystals are found within pegmatites. These include crystals of microcline, quartz, mica, spodumene, beryl, and tourmaline. Some individual crystals are over long. Most pegmatites are thought to form from the last fluid fraction of a large crystallizing magma body. This residual fluid is highly enriched in volatiles and trace elements, and its very low viscosity allows components to migrate rapidly to join an existing crystal rather than coming together to form new crystals. This allows a few very large crystals to form. While most pegmatites have a simple composition of minerals common in ordinary igneous rock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Counties Of Sweden
The counties of Sweden () are the first-level administrative subdivisions of Sweden. There are twenty-one counties; however, the number of counties has varied over time, due to territorial changes and to divisions or mergers of existing counties. They are ''not'' regarded as geographical areas by Swedes as they are not connected to dialects or identity, which is a role fulfilled by the historical provinces of Sweden (). This level of administrative unit was first established in the Instrument of Government (1634), 1634 Instrument of Government on Lord High Chancellor of Sweden, Lord Chancellor Count Axel Oxenstierna's initiative, and superseded the landskap, in order to introduce a more efficient administration of the realm. At that time, they were what the translation of ''län'' into English literally means: fiefdoms. The county borders often follow the provincial borders, but Monarchy of Sweden, the Crown often chose to make slight relocations to suit its purposes. In ever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almqvist & Wiksell
Almqvist & Wiksell is a former Swedish printing company (1882–2005) and publishing company (1923–1990). In 1990, it was bought by the educational publisher , and is now an imprint owned by the latter. Almqvist & Wiksell Tryckeri Almqvist & Wiksell Tryckeri AB in Uppsala was founded in October 1882, when philosophy graduate Robert Almqvist (1857–1938), son of politician Ludvig Teodor Almqvist and father of , and student Julius Wiksell (1855–1897) bought & Berglund's printing house. The company became a limited company (''aktiebolag'') in 1888. In 1904, after a "drawn-out fight" with publisher Norstedts, it was granted exclusive rights by the Royal Swedish Academy of Sciences to print almanacs, calendars and other similar works, including the Swedish state calendar. The first catalogue of calendar publications was published in 1906, and the company's exclusive rights continued until 1972. In 1923 Carl Z Haeggström, who before 1918 had been managing director of , which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vänersborg
Vänersborg () is a Urban areas in Sweden, locality and the seat of Vänersborg Municipality, Västra Götaland County, Sweden with 23,882 inhabitants (out of a municipal total of 39,904) Until 1997 it was the capital of Älvsborg County, which merged into Västra Götaland County. Since 1999 Vänersborg has been the seat of the regional parliament for Region Västra Götaland. The city is located on the southern shores of lake Vänern, close to where the river Göta älv leaves the lake. History A marketplace was established at Brätte at the southern end of Vassbotten (southernmost part of Vänern), south of modern Vänersborg, by the end of the medieval period. The settlement developed with paved streets lined with houses and farms and it was granted town privileges in 1580. The site, however, became unsuitable for trans-shipment of goods due to silting of its harbour and it was difficult to protect. Consequently, in 1644, the town was moved 3½ kilometres north to Huvudnäset, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
