Engineering Materials
Brass contains

70% copper and 30% zinc
85 - 92% copper and rest tin with little lead and nickel
90% copper and 10% tin
70 - 75% copper and rest tin

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Engineering Materials
The unit cells

Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
Have the same orientation and their similar faces are parallel
May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice
All of these

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