Engineering Materials
Beryllium bronze contains

80% copper and 20% beryllium
60% copper and 40% beryllium
97.75% copper and 2.25% beryllium
99% copper and 1% beryllium

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Engineering Materials
The unit cells

Have the same orientation and their similar faces are parallel
Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
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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