Zinc Sulfide Formula. 1. Why are BCC fcc and hcp lattices common crystal structures for metals? The zincblende structure, shown below, can be thought of as two interpenetrating fcc lattices, one of anions and one of cations, offset from each other by a translation of 1/4 along the body diagonal of the unit cell. Crystal - Crystal - Structure: Crystals can be grown under moderate conditions from all 92 naturally occurring elements except helium, and helium can be crystallized at low temperatures by using 25 atmospheres of pressure. Structure Factors: ( ) 8 , 4 4 1 , 2 1 0, 4 2 hk f hk N F if h k N hk N ++= = ± ++= + ++= + for hkl all even/all odd: As for . What are the coordination numbers of NaCl and CsCl? Each sodium ion in the crystal is surrounded by the six chlorine ions so, The face-centered cubic (fcc) has a coordination number of, The crystal structure of a diamond is a face-centered cubic or. Half of the tetrahedral holes in a hexagonal close packing are occupied. These are characterized by a 1:1 stoichiometric ratio of Zinc to Sulfur. To comply with 1 : 1 stoichiometry, four Zn2+ ions must be present in four alternate tetrahedral voids out of eight tetrahedral voids present. 2. Unit cell structure of magnesia. Zincblende is characterized as a cubic closet packing (ccp), also known as face-centered cubic, structure.1,4 This crystal lattice structure is shown in Figures 1 & 2 below. The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. One lattice is occupied by Zn atoms, the other by S atoms. ZnS, Zinc Sulphide, Zinc Blend, Wurtzite The crystal structure is also known as diamond cubic and may be thought of as two interpenetrating fcc lattices, one for sulphur the other for zinc, with their origins displaced by one quarter of a body diagonal. The crystal may be thought of as two interpenetrating fcc lattices, one for sulfur the other for zinc, with their origins displaced by one quarter of a body diagonal. Since the number of atoms in a single unit cell of Zn and S is the same, it is consistent with the formula ZnS. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. What cars have the most expensive catalytic converters? (Creator: Alexander Mann Date: 01/14/2006 Licensed under the Creative Commons Attribution-Share Alike 2.0 Germany license). The structure is three-dimensional. The compound CuCl [Formula mass= 99 g mol^-1 ] has FCC structure like ZnS. A break down of cubic closest packing. Licensed under the Creative Commons Attribution-Share Alike 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license. Radius ratios are only correct ca. The diamond cubic and zincblende structures are based on the FCC structure. [ "article:topic", "showtoc:no", "sphalerite", "zinc blend structure", "cubic closet packing", "ccp" ], https://chem.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fchem.libretexts.org%2FBookshelves%2FInorganic_Chemistry%2FMap%253A_Inorganic_Chemistry_(Housecroft)%2F06%253A_Structures_and_energetics_of_metallic_and_ionic_solids%2F6.11%253A_Ionic_Lattices%2F6.11E%253A_Structure_-_Zinc_Blende_(ZnS), Calculating density of a crystal structure, information contact us at info@libretexts.org, status page at https://status.libretexts.org. Wurtzite has a hexagonal closest packing structure (hcp), which is characterized by 12 ions in the corners of each unit that create a hexagonal prism (seen in Fig. Does Hermione die in Harry Potter and the cursed child? 9.1 Magnesia MgO (face-centered cubic structure, Fig. ZnS has a unique structure type compared to other molecules, having different types of unique structures. Therefore the ratio between cationic and anionic radii in zinc blend is 0.39 (74pm/190 pm) .This suggests a tetrahedral ion arrangement and four nearest neighbors from standard crystal structure prediction tables. ZnS (bl) ZnS (bl) CCP S2-with Zn2+ in half Tetrahedral holes (only T+ {or T-} filled) Lattice: fcc 4ZnS in unit cell Motif: S at (0,0,0); Zn at (1/4,1/4,1/4) Coordination: 4:4 (tetrahedral) Cation and anion sites are topologically identical ZnS (bl) Structural polymorphs: Zink blende Stable at normal P,T Question: In The ZnS Structure, The Larger Anion, S2– , Occupies “FCC” Lattice Positions While The Smaller Cation, Zn2+, Occupies One- Half (1⁄2) Of The Eight (8) Tetrahedral Holes Within The Unit Cell.