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Albrecht Schrauf
Albrecht Schrauf (14 December 1837, Vienna – 29 November 1897, Vienna) was an Austrian mineralogist and crystallography, crystallographer. Biography Schrauf studied mathematics, physics and mineralogy at the University of Vienna, where one of his instructors was Wilhelm Josef Grailich. Several years later, he became "custos-adjunct" at the "Imperial Hofmineralien Cabinet" in Vienna. In 1867 he was named first curator of the mineral cabinet, and in 1874 was appointed professor and director of the mineralogical museum at the University of Vienna. Known for his investigations in the field of crystallography, he was a proponent of the Miller index, crystallographic index developed by William Hallowes Miller. In the mid-1860s, he published his best works, "''Atlas der Krystallformen des Mineralreiches''" and an award-winning textbook titled "''Lehrbuch der physikalischen Mineralogie''". In Vienna, he collaborated with Gustav Tschermak in publication of the journal "''Mineralogische M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Vienna
The University of Vienna (german: Universität Wien) is a public research university located in Vienna, Austria. It was founded by Duke Rudolph IV in 1365 and is the oldest university in the German-speaking world. With its long and rich history, the university has developed into one of the largest universities in Europe, and also one of the most renowned, especially in the Humanities. It is associated with 21 Nobel prize winners and has been the academic home to many scholars of historical as well as of academic importance. History From the Middle Ages to the Enlightenment The university was founded on March 12, 1365, by Rudolf IV, Duke of Austria, hence the name "Alma Mater Rudolphina". After the Charles University in Prague and Jagiellonian University in Kraków, the University of Vienna is the third oldest university in Central Europe and the oldest university in the contemporary German-speaking world; it remains a question of definition as the Charles University in Prague ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albrechtschraufite
Albrechtschraufite (International Mineralogical Association, IMA List of mineral symbols, symbol: Asf) is a very rare complex hydrated calcium and magnesium-bearing uranyl fluoride carbonate mineral with formula Ca4Mg(UO2)2(CO3)6F2·17H2O. Its molar weight is 1,428.98 g, color yellow-green, Streak (mineralogy), streak white, density 2.6 g/cm3, Mohs hardness 2-3, and Lustre (mineralogy), luster is vitreous (glassy). It is named after Albrecht Schrauf (1837–1897), Professor of Mineralogy, University of Vienna. Its Type locality (geology), type locality is Jáchymov, Jáchymov District, Ore Mountains, Krušné Hory Mountains, Karlovy Vary Region, Bohemia, Czech Republic. See also *List of minerals *List of minerals named after people References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientists From Vienna
A scientist is a person who conducts scientific research to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. Though Thales (circa 624-545 BC) was arguably the first scientist for describing how cosmic events may be seen as natural, not necessarily caused by gods,Frank N. Magill''The Ancient World: Dictionary of World Biography'', Volume 1 Routledge, 2003 it was not until the 19th century that the term ''scientist'' came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833. In modern times, many scientists have advanced degrees in an area of science and pursue careers in various sectors of the economy such as academia, industry, government, and nonprofit environments.'''' History The roles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1897 Deaths
Events January–March * January 2 – The International Alpha Omicron Pi sorority is founded, in New York City. * January 4 – A British force is ambushed by Chief Ologbosere, son-in-law of the ruler. This leads to a punitive expedition against Benin. * January 7 – A cyclone destroys Darwin, Australia. * January 8 – Lady Flora Shaw, future wife of Governor General Lord Lugard, officially proposes the name "Nigeria" in a newspaper contest, to be given to the British Niger Coast Protectorate. * January 22 – In this date's issue of the journal ''Engineering'', the word ''computer'' is first used to refer to a mechanical calculation device. * January 23 – Elva Zona Heaster is found dead in Greenbrier County, West Virginia. The resulting murder trial of her husband is perhaps the only capital case in United States history, where spectral evidence helps secure a conviction. * January 31 – The Czechoslovak Trade Union Association is f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1837 Births
Events January–March * January 1 – The destructive Galilee earthquake causes 6,000–7,000 casualties in Ottoman Syria. * January 26 – Michigan becomes the 26th state admitted to the United States. * February – Charles Dickens's '' Oliver Twist'' begins publication in serial form in London. * February 4 – Seminoles attack Fort Foster in Florida. * February 25 – In Philadelphia, the Institute for Colored Youth (ICY) is founded, as the first institution for the higher education of black people in the United States. * March 1 – The Congregation of Holy Cross is formed in Le Mans, France, by the signing of the Fundamental Act of Union, which legally joins the Auxiliary Priests of Blessed Basil Moreau, CSC, and the Brothers of St. Joseph (founded by Jacques-François Dujarié) into one religious association. * March 4 ** Martin Van Buren is sworn in as the eighth President of the United States. ** The city of Chicago is incorporated. April–June * April 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemstone
A gemstone (also called a fine gem, jewel, precious stone, or semiprecious stone) is a piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments. However, certain rocks (such as lapis lazuli, opal, and obsidian) and occasionally organic materials that are not minerals (such as amber, jet, and pearl) are also used for jewelry and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other physical properties that have aesthetic value. Rarity and notoriety are other characteristics that lend value to gemstones. Apart from jewelry, from earliest antiquity engraved gems and hardstone carvings, such as cups, were major luxury art forms. A gem expert is a gemologist, a gem maker is called a lapidarist or gemcutter; a diamond cutter is called a diamantaire. Characteristics and classification The traditional classification in the West, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystal Form
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations. The scientific study of crystals and crystal formation is known as crystallography. The process of crystal formation via mechanisms of crystal growth is called crystallization or solidification. The word ''crystal'' derives from the Ancient Greek word (), meaning both "ice" and "rock crystal", from (), "icy cold, frost". Examples of large crystals include snowflakes, diamonds, and table salt. Most inorganic solids are not crystals but polycrystals, i.e. many microscopic crystals fused together into a single solid. Polycrystals include most metals, rocks, ceramics, and ice. A third category of sol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gustav Tschermak
Gustav Tschermak von Seysenegg (19 April 1836 – 24 May 1927) was an Austrian mineralogist. Biography He was born in Litovel, Moravia, and studied at the University of Vienna, where he obtained a teaching degree. He studied mineralogy at Heidelberg and Tübingen and obtained a PhD. He returned to Vienna as a lecturer in mineralogy and chemistry and, in 1862 was appointed second vice curator of the Imperial Mineralogical Cabinet, becoming director in 1868. He resigned as director in 1877. He was also professor of petrography at the University of Vienna. He was appointed professor in 1873 and a member of the Imperial Academy of Sciences, a member of the American Philosophical Society in 1882, and a member of the Royal Swedish Academy of Sciences in 1905. He died in 1927, aged 91. Work He did useful work on many minerals and on meteorites. The mineral tschermakite is named in his honour. In 1871 he established the ''Mineralogische Mitteilungen'' (Mineralogical Reports), publish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm Josef Grailich
Wilhelm Joseph Grailich (16 February 1829, in Pressburg – 13 September 1859, in Vienna) was an Austrian physicist, mineralogist and crystallographer. Education From 1847, Grailich studied sciences at the polytechnic institute in Vienna. Career Grailich served as an assistant to Andreas von Ettingshausen in the institute of physics at the University of Vienna. In 1856 he became an assistant at the ''Hofmineraliencabinett'', where soon afterwards, he succeeded Gustav Adolf Kenngott as " kustos-adjunkt". In 1857 he became an associate professor of higher physics at the university, and in 1859, was chosen as a member of the Vienna Academy of Sciences. Grailich, Wilhelm Joseph @ NDB/ADB Deutsche Biographie In 1910, a thoroughfare in the Landst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Hallowes Miller
Prof William Hallowes Miller FRS HFRSE LLD DCL (6 April 180120 May 1880) was a Welsh mineralogist and laid the foundations of modern crystallography. Miller indices are named after him, the method having been described in his ''Treatise on Crystallography'' (1839). The mineral known as millerite is named after him. Life and work Miller was born in 1801 at Velindre near Llandovery, Carmarthenshire, South Wales. He was educated at St John's College, Cambridge, where he graduated in 1826 as fifth wrangler. He became a Fellow there in 1829. For a few years Miller was occupied as a college tutor and during this time he published treatises on hydrostatics and hydrodynamics. Miller also gave special attention to crystallography, and at 31 years old, on the resignation of William Whewell he succeeded in 1832 to the professorship of mineralogy, a post he held until 1870. Miller's chief work, on ''Crystallography'', was published in 1839. He was elected to the Royal Society in 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miller Index
Miller indices form a notation system in crystallography for lattice planes in crystal (Bravais) lattices. In particular, a family of lattice planes of a given (direct) Bravais lattice is determined by three integers ''h'', ''k'', and ''ℓ'', the ''Miller indices''. They are written (hkℓ), and denote the family of (parallel) lattice planes (of the given Bravais lattice) orthogonal to \mathbf_ = h\mathbf + k\mathbf + \ell\mathbf, where \mathbf are the basis or primitive translation vectors of the reciprocal lattice for the given Bravais lattice. (Note that the plane is not always orthogonal to the linear combination of direct or original lattice vectors h\mathbf + k\mathbf + \ell\mathbf because the direct lattice vectors need not be mutually orthogonal.) This is based on the fact that a reciprocal lattice vector \mathbf (the vector indicating a reciprocal lattice point from the reciprocal lattice origin) is the wavevector of a plane wave in the Fourier series of a spatial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
