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It can be black, gray, brown, green, red, yellow, or orange, but it is almost never colorless. We want to hear from you.Summary: Zinc blend is a compound that comes in two forms: sphalerite and wurtzite. Figure \(\PageIndex{14}\): ZnS, zinc sulfide (or zinc blende) forms an FCC unit cell with sulfide ions at the lattice points and much smaller zinc ions occupying half of the tetrahedral holes in the structure. Zinc sulfide (ZnS) is a unique compound that forms two types of crystalline structures.
what is the chemical name for zinc blende? Relevance. Also called blende, zinc blende. This indirect method was popularized by LeClaire (France) in 1844 and therefore is commonly known as the French process. This chemical formula represents sphalerite in its pure form, but it is much more commonly found with significant amount of other elements substituting zinc. Roger the Mole.
CaF 2 – Fluorite; Na 2 O – Antifluorite; CdCl 2 – Cadmium chloride; CdI 2 – Cadmium iodide; TiO 2 – Anatase; TiO 2 – Rutile; AB3 structures. These elements substituting for zinc can cause variable colors in sphalerite.Sphalerite is common, but it does not often show up in casual collections of minerals, despite its occurrence in several different colors.
Fig.
In the indirect or French process, metallic zinc is melted in a graphite crucible and vaporized at temperatures above 907 °C (typically around 1000 °C). Miners have also been known to refer to sphalerite as zinc blende, black-jack and ruby jack. The rock dump at Niagara Falls in Canada has recently begun to produce sphalerite crystals as well, along with locations in Ontario and Quebec.Because of the frequency of inclusions and impurities in sphalerite, it is rarely found in its purest form. This mineral is not very hard, registering at 3.9 to 4.1 on the Mohs scale of hardness, and it is brittle. It maintains a tetrahedral arrangement in both forms.Mass of unit cell = Number of atoms in a unit cell x the mass of each atomSince the number of atoms in a single unit cell of Zn and S is the same, it is consistent with the formula ZnS.Density = Mass of unit cell / volume of unit cell.Notice how only half of the tetrahedral sites are occupied.
This is perhaps because sphalerite is most commonly found in black or dark gray due to the frequent presence of iron impurities in its makeup.Sphalerite is the most common zinc mineral and the most important zinc ore. The chemical structure of ZnS is simple and consists of the zinc metal attached to a sulfur atom through a polar covalent bond.
zinc sulfide (ZnS) ... what is the structural formula for 1,4 dichlorocyclohexane? 1 Answer.
1 (The text is taken from: Basic Solid State Chemistry, by Anthony R. West) 1.17 Some important structure types a) Rock salt (NaCl), zinc blende or sphalerite (ZnS), fluorite (CaF2), antifluorite (Na2O) These structures are considered together because they all have ccp/fcc anions and differ only in the positions of the cations. 1 It is characterized by single bonds between each atom and maintenance of a 1:1 zinc to sulfur ratio.
When pure (with little or no iron) it forms clear crystals with colours ranging from pale yellow (known as Cleiophane) to orange and red shades (known as Ruby Blende), but as iron content increases it forms dark, opaque metallic crystals (known as Marmatite). When iron content is high it is an opaque black variety, marmatite. Some other productive sites include the Elmwood and Gordonsville Mines in Tennessee and the Denton Mine in Illinois. There are four zinc ions and four sulfide ions in the unit cell, giving the empirical formula ZnS. Lv 7.
8 years ago. Transparent yellow and red specimens are highly prized, and may be cut into faceted shapes.The United States has a wide variety of sphalerite available for mining. Zinc hydroxide and hydrogen gas are produced. 4
The structure of Zincblende is simple and consists of the zinc metal-sulfur atom attached to each other via a polar covalent bond.The molecular or chemical formula of Zinc Sulfide is ZnS.