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Skuleboda
Skuleboda ( sv, Skuleboda kvartsfältspatbrott) 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 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 polymorphic to orthoclase. Its name is taken from that of the Amazon River, ... 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 ... [...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 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 over two thousand years, as attested by archaeological finds in 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 possessing a "lively green colour." It is occasionally cut and used as a gemstone. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vänersborg Municipality
Vänersborg Municipality (''Vänersborgs kommun'') is a municipality in Västra Götaland County in western Sweden. Its seat is located in the 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 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 International relations Twin towns — Sister cities The following cities are twinned with Vänersborg: * Arsuk, Sermersooq, Greenland * Åland, Finland * Eiði, Eysturoy, Faroe Islands * Herning, Midtjylland, Denmark * Lich, Hesse, Germany * Husby, Schleswig-Holstein, Germany * Kangasala, Western Finland, Finland * Siglufjörður, Eyjafjörður, Iceland * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Counties Of Sweden
The counties of Sweden (Swedish: ''Sveriges län'') are the top-level geographic subdivisions of Sweden. Sweden is today divided into 21 counties; however, the number of counties has varied over time, due to territorial gains/losses and to divisions and/or mergers of existing counties. This level of administrative unit was first established in the 1634 Instrument of Government on Lord Chancellor Count Axel Oxenstierna's initiative, and superseded the historical provinces of Sweden ( sv, 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 the Crown often chose to make slight relocations to suit its purposes. In every county there is a county administrative board (''länsstyrelse'') headed by a governor ('' landshövding''), appointed by the government, as well as a separate regional council ('' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Västra Götaland County
Västra Götaland County ( sv, Västra Götalands län) is a county or '' län'' on the western coast of Sweden. The county is the second most populous of Sweden's counties and it comprises 49 municipalities (''kommuner''). Its population of 1,616,000 amounts to 17% of Sweden's population. The formal capital and seat of the governor of Västra Götaland County is Gothenburg. The political capital and seat of the Västra Götaland Regional Council is Vänersborg. The county was established on 1 January 1998, when Älvsborg County, Gothenburg and Bohus County and Skaraborg County were merged. Provinces Sweden's counties are generally of greater importance than its provinces. The counties are the main administrative units for politics and population census counts. Due to its size and young age, the Västra Götaland County has no common heritage. Of cultural and historical significance are the provinces that Västra Götaland County consists of: Västergötland, Bohuslän an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, Finland to the east, and is connected to Denmark in the southwest by a bridgetunnel across the Öresund. At , Sweden is the largest Nordic country, the third-largest country in the European Union, and the fifth-largest country in Europe. The capital and largest city is Stockholm. Sweden has a total population of 10.5 million, and a low population density of , with around 87% of Swedes residing in urban areas in the central and southern half of the country. Sweden has a nature dominated by forests and a large amount of lakes, including some of the largest in Europe. Many long rivers run from the Scandes range through the landscape, primarily ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feldspar
Feldspars are 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 crystalize 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. Compositions The feldspar group of minerals consists of tectosilicates, silicate minerals in which silicon ions are linked by shared oxygen ions to form a three-dimensional network. Compositions of major elements in common feldspars can be expressed in terms of three endmembers: * potassium feldspar (K-spar) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz
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 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 minerals in the making of jewelry and hardstone carvings, especially in Eurasia. Quartz is the mineral defining the val ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feldspar
Feldspars are 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 crystalize 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. Compositions The feldspar group of minerals consists of tectosilicates, silicate minerals in which silicon ions are linked by shared oxygen ions to form a three-dimensional network. Compositions of major elements in common feldspars can be expressed in terms of three endmembers: * potassium feldspar (K-spar) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vänersborg
Vänersborg () is a locality and the seat of Vänersborg Municipality, Västra Götaland County, Sweden with 23,882 inhabitants (out of a municipal total of 39,591) Until 1997 it was the capital of Älvsborg County, which was dissolved in 1998. Since 1999 Vänersborg has been the seat of the regional parliament of Västra Götaland County. 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, and the new town of Vänersborg was es ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almqvist & Wiksell
Almqvist & Wiksell is a former Swedish printing and publishing company. Since 1990 it is a trademark owned by the publishing company Liber. Almqvist & Wiksell originated from the acquisition of the Uppsala company Edquist & Berglunds tryckeri by Robert Almqvist (1857–1938) and Julius Wiksell (1855–1897).Nationalencyklopedin ''Nationalencyklopedin'' (; "The National Encyclopedia" in English), abbreviated NE, is a comprehensive contemporary Swedish-language encyclopedia, initiated by a favourable loan from the Government of Sweden of 17 million Swedish kronor in 19 ..., Almqvist & Wiksell Tryckeri AB. http://www.ne.se/uppslagsverk/encyklopedi/lång/almqvist-wiksell-tryckeri-ab (retrieved 02-09-2022) References Book publishing companies of Sweden Mass media in Uppsala Publishing companies established in 1882 1882 establishments in Sweden {{publish-company-stub ... [...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 molecules 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, a few ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
