Pack Nickel
Pack Nickel
Nickel is known to pack with a cubic closest packing scheme.?
Nickel is known to pack with a cubic closest packing scheme. The density of nickel is 6.84 g/cm3. From this information, calculate the length of the unit cell and the radius of nickel, in pm.
There are 4 Ni atoms inside the unit cell of Ni: 8*1/8 on corners and 6*1/2 on faces.
Mass inside cell = 4*(AtWt Ni)/A where A = Avogadro constant = 6.022 x 10*23 mol^-1
Mass = 4*58.69/(6.022 x 10*23) = 3.90*10-22 g
Let side of cell = a; Volume of cell is therefore a^3
D =M/V a^3 = 3.90*10-22 /6.84 = 5.70*10^-23 cm^3
a = 3√5.70*10^-23 = 3.85*10^-8 cm (note density is in cm^-3 so a is in cm).
Lit = 352.38 pm?? DENSITY of Ni is 8.9 g cm^-3 !!!
The face diagonal of the cell = 4rNi where rNi is the radius of the nickel atom = √2*a (Pythagoras)
rNi = (√2*3.85*10^-8)/4 = 1.36*10-8 cm = 1.36 Å (1 Å = 1*10-8 cm) or 136 pm
Lit: 124 pm
http://en.wikipedia.org/wiki/Nickel
Nickel Pack DVD Box Set Preview 5
Look For Pack Nickel On eBay By Scrolling Down:
 Tandy Leathercraft Nickel Small Rapid Rivets 1000 Pack 1271-22 US $27.99 
|
 Tandy Leather Nickel Large Rapid Rivets 1000 Pack 1275-22 US $43.99
|
 O Ring 3" Steel Welded Nickel Plated Pack of 25 US $23.75
|
 O Ring 3" Steel Welded Nickel Plated Pack of 12 US $11.87
|
 O Ring 3" Steel Welded Nickel Plated Pack of 6 US $5.93
|
 O Ring 2 1/2" Steel Welded Nickel Plated Pack of 6 US $5.00
|
