In Min 2, how many FULL sulfur (S) atoms are in the unit cell and are there any

Question

In Min 2, how many FULL sulfur (S) atoms are in the unit cell and are there any fractions of atoms shared on the faces or edges? Answer with a number for Blank 1 and either “yes” or “no” for Blank 2

Cd Structure Type: Crystal Chemical Formula: Cd S Display Formula: Cd27 S36 Spacegroup: P63 m c (Polar) Crystal System: Hexagonal a: 4.1348 A c: 6.7490 A Asymmetric Unit: 2 sites Unit Cell: 4 sites per unit cell Site Density: 0.0400 sites/A3 Visible Atoms: 63 Cell Volume: 99.926A* Density: 4.8012 g/cmi3

Explanation / Answer

Dear student

Total number of full sulfur atom in the unit cell is 6. As 3 Sulfur atoms are present on triangular arrangements 2*3/2 = 3

And total Sulfur atoms from the hexagonal arrangements =3

Therefore in total there are 6 sulfur atoms present in the unit cell of CdS.

Thanks

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