What is the lattice structure of ZnS?

What is the lattice structure of ZnS?

ZnS, Zinc Sulphide, Zinc Blend, Wurtzite The crystal has a lattice parameter of 0.541 nm. 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.

Is ZnS BCC or fcc?

Arrangement of ions in zinc blende unit cell The S2- ions are Present in FCC (Face centered Cubic) arrangement. i.e The S2- ions are present at the corner of the cubic and at the center of each face. The Zn2+ ions are present in the alternative tetrahedral void.

What is the geometry of ZnS crystal?

ZnS exists in two main crystalline forms, and this dualism is often a salient 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.

How do you find the lattice constant of a zinc blende structure?

Calculate the zinc-blende lattice parameter (a) using the formula: a = (4/3^(1/2)) x (combined radius). For example, the lattice parameter of GaAs is: a = 0.568 nm = (4/3^(1/2)) x (0.126 nm + 0.120 nm) = (4/3^(1/2)) x (R1 + R2).

How are the cations arranged on ZnS unit cell?

They are hexagonal close-packed. They are located on each corner of the unit cell.

Which state of characteristics of ZnS crystal is correct?

Solution : ZnS has zinc blende structure. It has cubic close packed (ccp) structure. The `S^(2-)` ionsa re presesnt at the corners of the cube and at the centre of each face.

Is ZnS BCC?

Zinc sulfide (ZnS) is a unique compound that forms two types of crystalline structures. These two polymorphs are wurtzite and zincblende (also known as sphalerite). Wurtzite has a hexagonal structure, while zincblende is cubic….Introduction.

Which set of characteristics of ZnS crystal is correct?

ZnS has ccp structure (fee) in which S2− ions occupy comers and face-centres and Zn2+ ions are present in alternate tetrahedral voids. Further, each Zn2+ ion is surrounded tetrahedrally by 4S2− ions and vice-versa.

How many tetrahedral holes are in ZnS?

Totally 50% of tetrahedral voids are occupied in the diamond. Diamond has ZnS type structure. The total number of tetrahedral voids in fcc unit cell = 8, where the carbon atoms occupy 50% . i.e. 4 of them.

Which of the following is not correct about is ZnS structure?

We should know that in zinc blende structure (ZnS), sulphide ions are face-centred and zinc is present in alternate tetrahedral voids. Formula is ZnS. Coordination number of Zn is 4 and that of sulphide is 4. So, from this we can say that this statement is incorrect.

Which is correct statement about zinc blende structure?

Solution : `ZnS` has diamond cubic structure in which `S^(2-)` ions from `bcc` lattice and `Zn^(2+)` ions are present in alternalte `TV_(s)`. `Z_(eff)` of `S^(2-) = 4` (corner `+` face centre `= 3 + 4`). `Z_(eff)` of `Zn^(2+) = 4` (Total `TV_(s) = 8`, alternate `TV_(s) = 4`).

Is ZnS bcc?