Hydrogen sulfide is a flammable, colorless gas with a characteristic odor of rotten eggs. Germanium disulfide or germaniumiv sulfide is the inorganic compound with the formula. Germanium sulfide ges, ges2, 5n 12025320 suppliers. Using cyanide to recover gold from sulfide ores generally results in 30 to 35% recovery, and the best i have heard of is around 50% recovery. The majority of sulfides are metallic, opaque, generally sectile, soft to average in hardness and they have high densities, black or darkcolored streaks, and an igneous origin. The main sources of ge are sulfides ores of zn, pb, and cu, coal deposits, as well as. A wide range of solid solutions were determined to have 0. Pdf high photosensitivity and broad spectral response of multi.
The invention relates to lithium argyrodite of the general formula i. For each spectrum, the edge feature energy position, i. Germanium is a greyish white element that belongs to the carbon group. Openframework metal germanium sulphides with ordered micropores are a class of materials in which the metal, chalcogenide and template molecules may be varied to tune the pore size and.
Webelements periodic table germanium germanium oxide. When it was discovered, the element germanium was only theorized to exist by mendeleev in 1871. In its elemental form, germanium is a brittle grayish white semimetallic. A new class of mesostructured metal germanium sulfide materials has been prepared and characterized. They are of yellow cubic crystals and represented with the chemical formula y 2 s 3. Yttrium sulfide or yttrium iii sulfide is a chemical compound that is formed from yttrium and sulfur sulphur. Germanium dioxide, also called germanium oxide, germania, and salt of germanium, is an inorganic compound with the chemical formula geo 2. The compound is a 3dimensional polymer, in contrast to silicon disulfide, which is a onedimensional polymer. It is commonly known as hydrosulfuric acid, sewer gas, and stink damp.
Nci thesaurus ncit germide 4 is a monoatomic tetraanion and an elemental germanium. Exploration of the hydrogen sulfideagermanium sulfide system. References the data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following. Germanium disulfide was the first germanium compound found by. In compounds of germanium where known, the most common oxidation numbers of germanium are. Germanium difluoride gef 2 is a chemical compound of germanium and fluorine. Substoichiometric germanium sulfide thinfilms as a high. Phosphorus sulfide definition is any of several compounds of phosphorus and sulfur obtained by heating these elements. Germanium dichloride is a chemical compound of germanium and chlorine with the formula gecl 2. First is froth flotation, and second is cyanidation of the ores. The selenium compounds are isostructural and crystallize in the polar orthorhombic space group pca21. It is a colourless white crystalline material, which melts at.
Many of the crystalline materials are hygroscopic absorbs water, which can be challenging to work with. The chart below shows the calculated isotope pattern for the formula geo with the most intense ion set to 100%. Germanium is a chemical element with the symbol ge and atomic number 32. Germanium disulfide or germanium iv sulfide is the inorganic compound with the formula ge s 2. Phosphorus sulfide definition of phosphorus sulfide by. Germanium is a chemical element with symbol ge and atomic number 32. Hydrides the term hydride is used to indicate compounds of the type m x h y and not necessarily to indicate that any compounds listed behave as hydrides chemically. The sulfide minerals represent higher temperatures and a slightly deeper setting than the sulfate minerals, which reflect the oxygenrich environment near the earths surface. Indium is also carried in trace but noteworthy contents by excessmetal copperrich sulphides 16 like the mineral bornite, with structural formula cu 5 t fe t s 4 c. List of chemical compound and their formula for ssc, engineering, aipmt, cpmt, mbbs, iit, cbse class 11th, 12th, bsc, msc etc. It was first discovered in the silver mining area of freiberg, saxony, germany in the himmelsfurst mine.
Webelements periodic table germanium compounds information. It also forms as a passivation layer on pure germanium in contact with atmospheric oxygen. In general, the sulfides of cobalt are black, semiconducting, insoluble in water, and nonstoichiometric. Pdf germanium crystal chemistry in cubearing sulfides from.
What is the formula for germanium phosphate answers. Some infrared materials like germanium, silicon though it is difficult, zinc sulfide, zinc. The germanium sulfide ges2, with the cas registry number 12025342, has the iupac name of bissulfanylidenegermane. The fine coating of a iron compound definitely appears to be a key. List of germanium compounds, common compounds of germanium ge, formula, molecular weight.
To write the formula for cas well use the periodic table and follow some simple rules. New flexible and transparent solutionbased germanium. Iv response of the bulkbased electrode in co 2red and arblacksaturated electrolyte. Nonaqueous supramolecular assembly of mesostructured metal. Phosphorus sulfides comprise a family of inorganic compounds containing only phosphorus and sulfur. Germanium ii sulfide when dry is stable in air, hydrolyzes slowly in moist air but rapidly reacts in water forming geoh 2 and then geo. It is a white solid with a melting point of 110 c, and can be produced by reacting germanium tetrafluoride with germanium powder at 150300 c. Although sphalerite zns represents one of the primary sources of ge, with concentrations of up to several thousands of. Fabrication methods for infrared materials such as germanium, silicon, zinc sulfide, and zinc selenide are in general similar to normal glass optics. The crystalchemical formula of sphalerite can then be written zn t s c where t specifies the tetrahedral coordination of cations and c quotes the ccp of anions. Germanium monosulfide or germaniumii sulfide is the chemical compound with the formula. Convert grams germaniumiv sulfide to moles or moles germaniumiv sulfide to grams. New flexible and transparent materials based on germanium sulfide were obtained using gecl 4 and 1,3propanedithiol as precursors.
Cn102383196a novel nonlinear optical crystal gallium. A variety of techniques were employed to examine the structure and composition. Germanium crystal chemistry in cubearing sulfides from. The physical data from those compoundswhich corresponded well with mendeleevs predictionsmade the discovery an important confirmation of mendeleevs idea of. The chart below shows the calculated isotope pattern for the formula ges with the most intense ion set to 100%. Germanium monosulfide or germaniumii sulfide is the chemical compound with the formula ge s. How to write the formula for cas calcium sulfide youtube. Germaniumii sulfide also known as germanium monosulfide is a 2d ivvi semiconductor material with an indirect band gap of 1.
The pattern shows an orthorhombic cell which was found by the autoindexing program ito. In this video well write the correct formula for cas calcium sulfide. Mesostructured metal germanium sulfide and selenide. Germanium gallium sulfide glasses for prdoped fiber amplifiers at. Mesostructured metal germanium sulfides journal of the. Germanium crystal chemistry in cubearing sulfides from microxrf mapping and microxanes spectroscopy article pdf available in minerals 94. Cobalt sulfide is the name for chemical compounds with a formula co x s y. A stepbystep explanation of how to draw the na2s lewis dot structure.
The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom or group of atoms in the formula by the formula weight and multiplying by 100. Sulfides occur as primary accessory minerals in many different igneous rocks and in deep hydrothermal deposits that are closely related to igneous intrusions. Samples of chalcogenide glasses with the general formula 1xges1. Germanium gallium sulfide glass as host glass material for pr. It is a lustrous, hardbrittle, grayishwhite metalloid in the carbon group, chemically similar to its group neighbours silicon and tin. This invention is directed broadly to transparent glasses exhibiting excellent transmission far into the infrared region of the electromagnetic radiation spectrum, those glasses consisting essentially, expressed in terms of mole percent, of 4080% ga 2 s 3, 035% rs x, wherein r is at least one network forming cation selected from the group consisting of aluminum, antimony, arsenic. Predict the chemical formula for sodium sulfide, given the formula of lithium oxide, li2o. Wellcharacterized species include minerals with the formula cos, cos 2, co 3 s 4, and co 9 s 8. By the germanium powder and sulfur vapor or hydrogen sulfide and sulfur mixed gas from the system. The surfactants are the quaternary ammonium salts c 12 h 25 nme 3 br, c 14 h 29 nme 3 br, c 16 h 33 nme 3 br, and c 18 h 37 nme 3 br, which play the role of templates. Write chemical equations for each of the following. New flexible and transparent solutionbased germaniumsulfide. Openframework metal germanium sulphides with ordered micropores are a class of materials in which the metal, chalcogenide and template molecules may be.
Ge is germanium, s is sulfur, germanium di sulfide is ges2 germanium disulfide refers to the chemical compound with the formula ges2. Al2o3 and sio2 predict the formula for germanium oxide, ge. Germanium ii sulfide also known as germanium monosulfide is a 2d ivvi semiconductor material with an indirect band gap of 1. This companies are suppliers for equal products with the same cas number. Anisotropic optical properties of layered germanium sulfide. Hydrogen sulfide can also result from industrial activities, such as food processing, coke ovens, kraft paper mills, tanneries, and petroleum refineries. What the chemical formula for germanium and sulfur answers. A new series of germanium chalcophosphates with the formula a4gep4q12 a k, rb, cs. The formula indicated is based on a nominal composition used for the sample synthesis. The synthesis, via supramolecular assembly of welldefined germanium sulfide anionic cluster precursors and transitionmetal cations in formamide, represents a new strategy for the formation of this class of solids. The sulfur analogues are isostructural to one another but crystallize in the centrosymmetric monoclinic space group c2c. Exploration of the hydrogen sulfide germanium sulfide system jacob t.
The number of electrons in each of germanium s shells is 2, 8, 18, 4 and its electron configuration is ar 3d 10 4s 2 4p 2. Tsumeb mine tsumcorp mine, tsumeb, otavi, namibia link to location data. The preparation of a germanium containing copolymer having a germanium iv unit and a trimethylene sulfide unit alternatingly in the main chain was described by shoda et al. The sulfide class minerals comprise an economically important class of minerals. Us5392376a us08225,767 us22576794a us5392376a us 5392376 a us5392376 a us 5392376a us 22576794 a us22576794 a us 22576794a us 5392376 a us5392376 a us 5392376a authority us united states prior art keywords glass refractive index group consisting cation selected glasses prior art date 19940411 legal status the legal status is an assumption and is not a legal conclusion. Nonaqueous supramolecular assembly of mesostructured. Germanium crystal chemistry in cubearing sulfides from micro. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature. Electrochemical reduction of co2 using germaniumsulfideindium. Pdf germanium crystal chemistry in cubearing sulfides. Structure, properties, spectra, suppliers and links for. Germanium sulfides were also investigated by abel et al.
For na2s we have an ionic compound and we need to take that into account when we. The molten state is fresh brown transparent body, the density of 3. Buy germaniumii sulfide cas 12025320, a product for proteomics research, from santa cruz. Winkler was able to prepare several new compounds of germanium, including fluorides, chlorides, sulfides, dioxide, and tetraethylgermane gec 2 h 5 4, the first organogermane. Predict the chemical formula for sodium sulfide, given the. Recovery of gold in sulfide ores has fallen into several categories. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Pdf firstprinciples calculations of the band gap and. Sulfide also refers to chemical compounds large families of inorganic and organic compounds, e.
Synthesis of a new lithium ionic conductor, thiolisicon. Germanium is an element with atomic symbol ge, atomic number 32, and atomic weight 72. Argyrodite is a rare silver germanium sulfide mineral. The novel nonlinear optical crystal gallium germanium barium sulfide has the chemical formula of baga2ges6, has an asymmetrical center structure and belongs to a trigonal crystal system, wherein the space group is r3. It is a lustrous, hard, grayishwhite metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. The germanium sulfideges2, with the cas registry number 12025342, has the iupac name of bissulfanylidenegermane. Electrochemical reduction of co2 using germaniumsulfide. Two are of commercial significance, phosphorus pentasulfide p 4 s 10, which is made on a kiloton scale for the production of other organosulfur compounds, and phosphorus sesquisulfide p 4 s 3, used in the production of strike anywhere. Most major ores of important metals such as copper, lead and silver are sulfides. Sulfide british english also sulphide is an inorganic anion of sulfur with the chemical formula s 2. Germanium kedge xanes spectra for gebearing model compounds and studied copper sulfides are shown in figure 6a, while their respective first derivatives are shown in figure 6b. Webelements periodic table germanium germanium sulphide.
Users may download and print one copy of any publication from the. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The following companies are not suppliers of germanium sulfide ges, ges2, 5n. Germanium was first discovered by clemens winkler in 1886. This is produced during the process of parametric polymorphism. High purity germanium sulfide is also suitable for use as a reference standard for equipment calibration and impurity analysis. Faradaic efficiency against negative cathodic potentials for bulk samples. Germanium monosulfide or germanium ii sulfide is the chemical compound with the formula ge s. Pure germanium is a semiconductor with an appearance similar to elemental silicon.
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