Recent questions tagged packing-in-crystalline-solids

The fraction of volume occupied in a diamond shaped cubic cell is:

asked Jul 15, 2014 by balaji.thirumalai

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The fraction of volume occupied in a face centric cubic cell is:

asked Jul 15, 2014 by balaji.thirumalai

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The fraction of volume occupied in a body centric cubic cell is:

asked Jul 15, 2014 by balaji.thirumalai

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The fraction of volume occupied in a primitive cubic cell is:

asked Jul 15, 2014 by balaji.thirumalai

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What is the total number of atoms in a cubic based unit cell having one atom on each corner and two atoms on each diagonal?

asked Jul 15, 2014 by balaji.thirumalai

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In a ccp of mixed oxide, it is found that lattice has $O^{2-}$ ions and one half of the octahedral voids are occupied by trivalent cataions ($X^{3+}$) and one eight of the tetrahedral voids by divalent cataions ($Y^{2+}$). What is the formula of the mixed oxide?

asked Jul 15, 2014 by balaji.thirumalai

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A compound is formed by 2 elements M and N. The element N forms ccp and atoms of M occupy a third of tetrahedral voids. What is the formula of the compound?

asked Jul 15, 2014 by balaji.thirumalai

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A compound is formed by 2 elements M and N. The element N forms ccp and atoms of M occupy a third of tetrahedral voids. What is the formula of the compound?

asked Jul 15, 2014 by balaji.thirumalai

1 answer

An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces. What is the empirical formula for this compound?

asked Jul 15, 2014 by balaji.thirumalai

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An alloy of Copper , Silver and Gold is found to have Copper constituting the C.C.P lattice. If Silver atoms occupy the edge centres and Gold is present at body centre , the alloy will have the formula:

asked Feb 28, 2014 by sharmaaparna1

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The compound formed by elements X and Y crystallizes in cubic structure in which X atoms are at the corners of the cube and Y atoms are at the face centre . The formula of the compound is

asked Feb 28, 2014 by sharmaaparna1

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In a face centred cubic arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centered. One of the A atom is missing from one corner in unit cell. The simplest formula of compound is

asked Feb 28, 2014 by sharmaaparna1

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The ratio of closed packed atoms to tetrahedral holes in cubic close packing is

asked Feb 28, 2014 by sharmaaparna1

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The Vacant space in body centered cubic lattice b.c.c unit cell is about

asked Feb 27, 2014 by sharmaaparna1

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How many number of atoms are there in a cube based unit cell having one atom each corner and two atoms on each body diagonal of cube ?

asked Feb 18, 2014 by sharmaaparna1

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In which of the following crystals alternate tetrahedral voids are occupied

asked Feb 17, 2014 by sharmaaparna1

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In a solid AB having the NaCl structure A atoms occupy the corners of the cubic unit cell . If all the faces centred atoms along one of the axis are removed then the resultant stoichiometry of the solid is

asked Feb 17, 2014 by sharmaaparna1

2 answers

The co-ordination number of metal crystallizing in a structure adopting hexagonal close packing is

asked Feb 17, 2014 by sharmaaparna1

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Percentage of free space in cubic close packed structure and in body centered packed structure are respectively:

asked Feb 17, 2014 by sharmaaparna1

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In a compound atoms of element Y form ccp lattice and those of element X occupy ${\large\frac{2}{3}}^{rd}$ of tetrahedral voids. The formula of the compound will be

asked Feb 17, 2014 by sharmaaparna1

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Total Volume of atoms present in a face centered cubic unit cell of a metal is (r is atomic radius)

asked Feb 17, 2014 by sharmaaparna1

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An ionic compound has unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces of cube. The empirical formula of this compound is

asked Feb 17, 2014 by sharmaaparna1

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Na and Mg crystallise in b.c.c and f.c.c type crystals respectively , then the number of atoms of Na and Mg present in the unit cell of their respectively crystal is

asked Feb 17, 2014 by sharmaaparna1

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