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Sphalerite, the more common polymorph of zinc sulfide Wurtzite, the less common polymorph of zinc sulfide. ZnS exists in two main crystalline forms. This dualism is an example of polymorphism. In each form, the coordination geometry at Zn and S is tetrahedral. The more stable cubic form is known also as zinc blende or sphalerite.
This is also known as the sphalerite structure or the Structurbericht designation B3. Pages in category "Zincblende crystal structure" The following 36 pages are in this category, out of 36 total.
Sphalerite is a sulfide mineral with the chemical formula (Zn, Fe)S. [5] It is the most important ore of zinc.Sphalerite is found in a variety of deposit types, but it is primarily in sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide deposits.
Sphalerite ZnS; Chalcopyrite CuFeS 2; Pyrrhotite Fe 1–x S; Millerite NiS; Pentlandite (Fe,Ni) 9 S 8; Covellite CuS; Cinnabar HgS; Realgar AsS; Orpiment As 2 S 3; Stibnite Sb 2 S 3; Pyrite FeS 2; Marcasite FeS 2; Molybdenite MoS 2; Sulfarsenides: Cobaltite (Co,Fe)AsS; Arsenopyrite FeAsS; Gersdorffite NiAsS; Sulfosalts: Pyrargyrite Ag 3 SbS 3 ...
Wurtzite is a zinc and iron sulfide mineral with the chemical formula (Zn,Fe)S, a less frequently encountered structural polymorph form of sphalerite. The iron content is variable up to eight percent. [5] It is trimorphous with matraite and sphalerite. [2] It occurs in hydrothermal deposits associated with sphalerite, pyrite, chalcopyrite ...
Three crystalline forms of CdSe are known which follow the structures of: wurtzite (hexagonal), sphalerite (cubic) and rock-salt (cubic). The sphalerite CdSe structure is unstable and converts to the wurtzite form upon moderate heating. The transition starts at about 130 °C, and at 700 °C it completes within a day.
There occur as many Madelung constants M i in a crystal structure as ions occupy different lattice sites. For example, for the ionic crystal NaCl, there arise two Madelung constants – one for Na and another for Cl. Since both ions, however, occupy lattice sites of the same symmetry they both are of the same magnitude and differ only by sign.
One structure is the "interpenetrating primitive cubic" structure, also called a "caesium chloride" or B2 structure. This structure is often confused for a body-centered cubic structure because the arrangement of atoms is the same. However, the caesium chloride structure has a basis composed of two different atomic species.
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