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Edwardsite
Monazite is a primarily reddish-brown phosphate mineral that contains rare-earth elements. Due to variability in composition, monazite is considered a group of minerals. The most common species of the group is monazite-(Ce), that is, the cerium-dominant member of the group. It occurs usually in small isolated crystals. It has a hardness of 5.0 to 5.5 on the Mohs scale of mineral hardness and is relatively dense, about 4.6 to 5.7 g/cm3. There are five different most common species of monazite, depending on the relative amounts of the rare earth elements in the mineral: * monazite-(Ce), ( Ce, La, Nd, Th) PO4 (the most common member), * monazite-(La), (La,Ce,Nd)PO4, * monazite-(Nd), (Nd,La,Ce)PO4, * monazite-(Sm), ( Sm, Gd,Ce,Th)PO4, * monazite-(Pr), ( Pr,Ce,Nd,Th)PO4. The elements in parentheses are listed in the order of their relative proportion within the mineral: lanthanum is the most common rare-earth element in monazite-(La), and so forth. Silica (SiO2) is present in trace a ...
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Edscottite
Edscottite is an iron carbide mineral, with the formula Fe5C2. It was previously known to occur during iron smelting, but in 2019 was identified as occurring in nature, but not naturally occurring on earth, when it was discovered in a meteorite. The source, the Wedderburn meteorite, was found in 1951 just outside Wedderburn in Australia, and is held in the Museums Victoria Museums Victoria is an organisation which operates three major state-owned museums in Melbourne, Victoria: the Melbourne Museum, the Immigration Museum and Scienceworks Museum. It also manages the Royal Exhibition Building and a storage facil ... collection. During a re-investigation of a section of the meteorite housed at the University of California, Los Angeles, Chi Ma and Alan Rubin verified the presence of a new mineral. They named it edscottite in honor of Edward (Ed) R. D. Scott of the University of Hawaii, USA, a pioneering cosmochemist. Further reading *2008 Leonard Medal for Edward R. D. Scott, ...
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Edoylerite
Edoylerite is a rare mercury containing mineral. Edoylerite was first discovered in 1961 by Edward H. Oyler, whom the mineral is named after, in a meter-sized boulder at the Clear Creek claim in San Benito County, California. The Clear Creek claim is located near the abandoned Clear Creek mercury mine. The material from the boulder underwent several analyses including, X-ray powder diffraction (XRD), a single crystal study, and a preliminary electron microprobe analysis (EMA). Using these analyses it was determined that this was a new mineral but the nature of the material at the time prevented further investigation. It was not until 1986, with the discovery of crystals large enough for a crystal structure determination and a sufficient quantity for a full mineralogical characterization, that the study was renewed. The new edoylerite crystals were found in the same area at the Clear Creek claim but were situated in an outcrop of silica-carbonate rock. This silica-carbonate rock was ...
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Edingtonite
Edingtonite is a white, gray, brown, colorless, pink or yellow zeolite mineral. Its chemical formula is Ba Al2 Si3 O10·4 H2O. It has varieties with tetragonal, orthorhombic or triclinic crystals. The mineral occurs within cavities in nepheline syenites, carbonatites, in hydrothermal veins and various mafic rocks. It occurs associated with thomsonite, analcime, natrolite, harmotome, brewsterite, prehnite and calcite. The mineral was first reported by and named for Scottish mineral collector James Edington (1787–1844). Other sources (including the mineralogist Haidinger) credit Scottish geologist and mineralogist Thomas Edington Thomas Edington FRSE FGS MWS (1814–1859) was a Scottish foundry owner and important amateur geologist and mineralogist. He was proprietor of Thomas Edington & Son. Life He was born in Glasgow the eldest son of Thomas Edington of Glasgow (1783 ... (1814-1859). However, as the mineral was named in 1825, the former accreditation must be the true ...
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Edenite
Edenite is a double chain silicate mineral of the amphibole group with the general chemical composition NaCa2Mg5(Si7Al)O22(OH)2. Edenite is named for the locality of Edenville, Orange County, New York, where it was first described. Occurrence Edenite has been found primarily in metamorphic rocks, occurring in pods of other magnesium rich minerals within a marble formation or with garnet rich lherzolites from deep within the Earth's crust. Thus, finding edenite in the field can indicate high temperature regional metamorphism of the surrounding rocks. Uses and importance While edenite is not important for commercial or industrial applications, it is often studied because of its unique chemical substitution properties. Results from research performed on amphiboles have shown that edenite is particularly suited for fitting chloride anions into its chemical framework. This makes edenite a good candidate for use in chlorine isotope fractionation in amphibole-bearing rocks. Many s ...
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