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Stiblite
Stiblite, ''stibilite'', ''stibiolite'' ( from + , stone), also ''stibiconise'' or ''antimony ochre''''Krivovichev V. G.'' Mineralogical glossary. Scientific editor :uk:Булах Андрій Глібович, A. G. Bulakh. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0 (, )''Robert Philips Greg, William Garrow Lettsom'' (1858). Manual of the Mineralogy of Great Britain & Ireland. — London: John Van Voorst, 1858. — an obsolete, formerly widely used mineralogical name for one of the best known and most widespread antimony ochres. Established in 1847 (by Johann Reinhard Blum, Johann Blum and Delfs) a decade and a half after stibiconite,Minerals (handbook). Volume II. Issue 3. Complex oxides, titanates, niobates, tantalates, antimonates, hydroxides. Editors in charge: '':ru:Чухров, Фёдор Васильевич, F. V. Chukhrov, :ru:Бонштед-Куплетская, Эльза Максимилиановна, E. M. Bonsht ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antimony Ochre
Antimony ochre (Antimony ocher in American English) or ''ochre of antimony'' (, ) — a partially obsolete trivial name for secondary antimony minerals of the Oxide mineral, oxide class. Antimony ochres most often have the appearance of a powdery brown-yellow to whitish product of weathering (oxidation) of antimonite or native antimony. Usually they are not a pure mineral (one of the ochres), but a mixture of two or more minerals: cervantite, valentinite, romeite, senarmontite, stibiconite, sometimes with an admixture of limonite or quartz. In the mineralogical sense of the word, antimony ochres are a loosely defined group of secondary antimony minerals of the oxide and hydroxide class. The most common antimony ochres are cervantite, romeite, and stibiconite,''Krivovichev V. G.'' Mineralogical glossary. Scientific editor :uk:Булах Андрій Глібович, A. G. Bulakh. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0 but th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stilbite
Stilbite is the name of a series of tectosilicate minerals of the zeolite group. Prior to 1997, stilbite was recognized as a mineral species, but a reclassification in 1997 by the International Mineralogical Association changed it to a series name, with the mineral species being named: * Stilbite-Ca * Stilbite-Na, sometimes also called '' stiblite''''Krivovichev V. G.'' Mineralogical glossary. Scientific editor A. G. Bulakh. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0 Stilbite-Ca, by far the more common of the two, is a hydrous calcium sodium and aluminium silicate, Na Ca4( Si27 Al9) O72·28( H2O). In the case of stilbite-Na, sodium dominates over calcium. The species are visually indistinguishable, and the series name stilbite is still used whenever testing has not been performed. History At one time heulandite and stilbite were considered to be identical minerals. After they were found to be two separate species, in 181 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stibiconite
Stibiconite, also formerly known as '' stiblite''''Robert Philips Greg, William Garrow Lettsom'' (1858). Manual of the Mineralogy of Great Britain & Ireland. — London: John Van Voorst, 1858. or '' antimony ochre''Bulletin of the United States National Museum. Published under the Direction of the Smithsonian Institution. Washington: Government Printing Office, No.32, 1887. is an antimony oxide mineral with formula: Sb3O6(OH). Its name originates from Greek (), 'antimony' and (), 'powder', alluding to its composition and habit. It is a member of the pyrochlore super group. Discovery and occurrence It was first described in 1862 for an occurrence in the Brandholz – Goldkronach District, Fichtel Mountains, Bavaria, Germany. It occurs as a secondary alteration product of other hydrothermal antimony minerals such as stibnite. It occurs in association with cervantite, valentinite, kermesite, native antimony Native antimony is a mineral belonging to the group of native elemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stilbite
Stilbite is the name of a series of tectosilicate minerals of the zeolite group. Prior to 1997, stilbite was recognized as a mineral species, but a reclassification in 1997 by the International Mineralogical Association changed it to a series name, with the mineral species being named: * Stilbite-Ca * Stilbite-Na, sometimes also called '' stiblite''''Krivovichev V. G.'' Mineralogical glossary. Scientific editor A. G. Bulakh. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0 Stilbite-Ca, by far the more common of the two, is a hydrous calcium sodium and aluminium silicate, Na Ca4( Si27 Al9) O72·28( H2O). In the case of stilbite-Na, sodium dominates over calcium. The species are visually indistinguishable, and the series name stilbite is still used whenever testing has not been performed. History At one time heulandite and stilbite were considered to be identical minerals. After they were found to be two separate species, in 181 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goldkronach
Goldkronach (East Franconian German, East Franconian: ''Gronich'') is a Town#Germany, town in the Bayreuth (district), district of Bayreuth, in Bavaria, Germany. It is situated near the Fichtel Mountains, 12 km northeast of Bayreuth. History On 25 June 1836, at 22:15, residents awoke to a man yelling "Fire! Fire!". In almost 2 hours, almost half of the eastern part of the town burned down, including the parish church, all two schools, the City Hall, 55 houses, and 16 other buildings. 127 families were rendered homeless. Three years later, on 18 June 1839 midnight, another fire broke out in the market. Within two hours, 29 houses and 17 buildings in the south side of town became the victims of the fire. Population development * 1961: 2945 * 1970: 2935 * 1987: 2903 * 2000: 3598 * 2010: 3606 Notable people * Sigismund von Reitzenstein (1766-1847), politician and diplomat of Baden Lived and worked in Goldkronach * Georgius Agricola (1494–1555), scholar of the Renaissance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Romeite
Roméite is a calcium antimonate mineral with the chemical formula . It is a honey-yellow mineral crystallizing in the hexoctahedral crystal system. It has a Mohs hardness of 5.5-6.0. It occurs in Algeria, Australia, Brazil, China, Europe, Japan, New Zealand, and the United States in metamorphic iron-manganese deposits and in hydrothermal antimony-bearing veins. Its type locality is Prabornaz Mine, Saint-Marcel, Aosta Valley, Italy. It was named after Jean-Baptiste L. Romé de l'Isle. Brugger, et al. (1997) used infrared spectroscopy Spectroscopy is the field of study that measures and interprets electromagnetic spectra. In narrower contexts, spectroscopy is the precise study of color as generalized from visible light to all bands of the electromagnetic spectrum. Spectro ... to measure water content in Roméite crystals. References Further reading *Brugger, J., R. Gieré, Stefan Graeser, Nicolas Meisser, The crystal chemistry of roméite, Contributions to Mineral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminosilicate
Aluminosilicate refers to materials containing anionic Si-O-Al linkages. Commonly, the associate cations are sodium (Na+), potassium (K+) and protons (H+). Such materials occur as minerals, coal combustion products and as synthetic materials, often in the form of zeolites. Both synthetic and natural aluminosilicates are of technical significance as structural materials, catalysts, and reagents. Important representatives Feldspar is a common tectosilicate aluminosilicate mineral made of potassium, sodium, and calcium cations surrounded by a negatively charged network of silicon, aluminium and oxygen atoms. Many aluminosilicates are synthesized by reactions of silicates, aluminates, and other compounds. They have the general formula where M+ is usually H+ and Na+. The Si/Al ratio is variable, which provides a means to tune the properties. Many of these materials are porous and exhibit properties of industrial value. Naturally occurring microporous, hydrous aluminosilicate m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeolite
Zeolites are a group of several microporous, crystalline aluminosilicate minerals commonly used as commercial adsorbents and catalysts. They mainly consist of silicon, aluminium, oxygen, and have the general formula ･y where is either a metal ion or H+. The term 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 obtained is examined by the International Zeolite Association Structure Commission (IZA-SC) and receives a three-letter designation. Character ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stibnite
Stibnite, sometimes called antimonite, is a sulfide mineral, a mineral form of antimony trisulfide ( Sb2 S3). It is a soft, metallic grey crystalline solid with an orthorhombic space group. It is the most important source for the metalloid antimony. The name is derived from the Greek through the Latin as the former name for the mineral and the element antimony. Structure Stibnite has a structure similar to that of arsenic trisulfide, As2S3. The Sb(III) centers, which are pyramidal and three-coordinate, are linked via bent two-coordinate sulfide ions. However, some studies suggest that the actual coordination polyhedra of antimony are SbS7, with (3+4) coordination at the M1 site and (5+2) at the M2 site. Some of the secondary bonds impart cohesion and are connected with packing. Stibnite is grey when fresh, but can turn superficially black due to oxidation in air. Properties The melting point of Sb2S3 is . The band gap is 1.88 eV at room temperature and it is a pho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Department Of Cajamarca
Cajamarca (; ; ) is a department and region in Peru. The capital is the city of Cajamarca. It is located in the north part of the country and shares a border with Ecuador. The city has an elevation of above sea level in the Andes Mountain Range, the longest mountain range in the world. Part of its territory includes the Amazon Rainforest, the largest in the world. History The oldest known irrigation canals in the Americas are located in the Nanchoc District of Cajamarca Department. The canals in the Zaña Valley have been radiocarbon dated to 3400 BCE, and possibly date to 4700 BCE. From the 6th to the 10th century the people of the Wari culture ruled earlier cultures in the highlands. They established the administrative center of Wiraquchapampa. In the 15th century, the Incas conquered the territory, expanding their empire. They established their regional capital in what is now Cajamarca. The Incas in 1465 established a new province there to serve as a bridge to their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
