→Cubic Anion Coord. The other common examples of this structural prototype of are CuF2, BaF2, PbF2, HgF2, SrF2. Dear student...In antifluorite, of formula A2X, the coordination numbers of cation and anion must be in the ratio of 1:2. Therefore, four sulfur atoms surround each zinc atom and four zinc atoms surround each sulfur atom. is done on EduRev Study Group by NEET Students. Formula A xXy, the coordination numbers (CNs) of A and X must be in the ratio of y:x. In antifluorite (A2X), since the cations occupy tetrahedral sites, the anion CN must be 8. 4. community of NEET. By continuing, I agree that I am at least 13 years old and have read and Other articles where Antifluorite structure is discussed: sulfide mineral: …eight metal cations—is called the antifluorite structure. Can you explain this answer? | EduRev NEET Question is disucussed on EduRev Study Group by 135 NEET Students. The Coordination number of Ca +2 ion is eight and that of F- ion is four, this is called 8:4 Coordination. In the fluorite structure the coordination number of `Ca^(2+)` ion is . The most important of these compounds are the fluorite/ antifluorite structure (CaF. Can you explain this answer? over here on EduRev! Since the cations occupy tetrahedral sites, the anion coordination number must be eight.. Antifluoride structure has opposite arrangement of inos than fluorite structure. Therefore, the coordination number ratio of Ca2+ and F– is 8:4. 2 The coordination number, the number of of electron pairs donated to a metal by its ligands, for both zinc an sulfur is four. In antifluorite, of formula A2X, the coordination numbers of cation and anion must be in the ratio of 1:2. Calcium Carbonate – CaCO 3 – Polymorphs; Group 14 Elements. Correct answer is option 'C'. Can you explain this answer? Coordination number of cation = 4. In Li2O, having the antifluorite structure, the coordination numbers for 2- ions Li+ ions respectively area)4 and 4b)4 and 8c)8 and 4d)6 and 6Correct answer is option 'C'. is done on EduRev Study Group by NEET Students. 2), rutile structure (TiO. Dear student...In antifluorite, of formula A2X, the coordination numbers of cation and anion must be in the ratio of 1:2. The chemical formula is of the type M 2 In which of the following structures coordination number for cations and anions in the packed structure will be same? Can you explain this answer? 2) and the cadmium diiodide structure (CdI. Neuron Structure and Function | Control and Coordination |, Coordination chemistry - Coordination Compounds. Antifluoride structure has opposite arrangement of inos than fluorite structure. The surrounding geometry of Ca2+ ion is tetrahedral and of F– is cubical in nature. Answers of In Li2O, having the antifluorite structure, the coordination numbers for 2- ions Li+ ions respectively area)4 and 4b)4 and 8c)8 and 4d)6 and 6Correct answer is option 'C'. →Tetrahedral Connectivity →Edge sharing FCa 4 tetrahedra or edge sharing CaF 8 cubes 4 CaF 2 in unit cell Ca2+ Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. You can study other questions, MCQs, videos and tests for NEET on EduRev and even discuss your questions like Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. the coordination number of the cations must be twice that of the anions. The Questions and In order to see this, it is convenient to redefine the origin of the unit cell to coincide with a cation rather than an anion. Since the cations occupy tetrahedral sites, the anioncoordination number must be eight. The cations and anions are arranged in alternate form in- (a) metallic crystal (b) ionic crystal semi – conductor (c) covalent crystal (d) crystal. The coordination number of Ca2+ is eight while each F– ion is surrounded by four calcium ions. Examples of the antiflurite structure are K 2 O, Li 2 O, Na 2 O, K 2 S, and Na 2 S. No. soon. This discussion on In Li2O, having the antifluorite structure, the coordination numbers for 2- ions Li+ ions respectively area)4 and 4b)4 and 8c)8 and 4d)6 and 6Correct answer is option 'C'. Fluorite / antifluorite structure (CaF. 2). 2), cadmium dichloride structure (CdCl. 2. Apne doubts clear karein ab Whatsapp (8 400 400 400) par bhi. Fluorite (CaF2) and Antifluorite (Li2O) Fluorite: CCP of Ca2+with all T+and T-holes filled with F-Antifluorite: CCP of O2-with all T+and T-holes filled with Li+ Coordination= 8, 4 (fluorite) Cation Coord. Each unit cell has 4 calcium ions and 8 fluoride ions as explained below . Since the cations occupy tetrahedral sites, the anion coordination number must be eight.. Antifluoride structure has opposite arrangement of inos than fluorite structure. of F ions = 8 (within the body)×1 = 8 . The coordination number of cations is 4 and that of anions is 8. The antifluorite structure is the opposite arrangement, with anions in the fcc array with coordination number 8 and cations in the tetrahedral holes with coordination number 4. Try it now. Antiflourite structure has FCC packing of anions. * A clear view: The cation at X(4 1 4 1 4 1) may be chosen as the new origin Caesium Peroxide Cs 2 O 2; Dipotassium Pentasulfide (K 2 S 5) Lithium nitride (Li 3 N) Na 172 In 192 Pt 2; K 4 Ge 4 [Cs(18-crown-6) 2] + e – Group 2 Elements. Apart from being the largest NEET community, EduRev has the largest solved Nov 25,2020 - In Li2O, having the antifluorite structure, the coordination numbers for 2- ions Li+ ions respectively area)4 and 4b)4 and 8c)8 and 4d)6 and 6Correct answer is option 'C'. EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. are solved by group of students and teacher of NEET, which is also the largest student For antifluorite structure coordination number of cations and anions are respectively. No. In an ionic crystal, both cations and anions are bound together by ……….. An ionic compound is made-up of A cations and B anions. For antifluorite structure. It is Li 2 NH (antifluorite) & LiNH 2 (defect antifluorite) Group 1 Elements. of Ca +2 ions = 8(at corners)×1/8 + 6 (at face centres)´1/2 . Coordination number of anion = 8 Can you explain this answer? All tetrahedral sites are filled with cations. For rock salt and zinc blende, x = y and anions and cations have the same CN. It is the arrangement of some of the more valuable precious metal tellurides and selenides among which is hessite (Ag2Te), the ore mineral of silver. Can you explain this answer? 1. 1,2 The difference between wurtzite and zincblende lies in the different arrangements of layers of ions. Question bank for NEET. The Questions and Answers of In Li2O, having the antifluorite structure, the coordination numbers for 2- ions Li+ ions respectively area)4 and 4b)4 and 8c)8 and 4d)6 and 6Correct answer is option 'C'. 2) agree to the. Thus the number of CaF 2 units per unit cell is 4. 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