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which are true for Body centered cubic crystal structures

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they are not close packed structures, they have no close packed planes, they have three close packed directions in the x,y and z directions

they are close packed structures, they have four close packed planes, they have four close packed directions in each close packed plane

they are close packed structures, they have four close packed planes, they have three close packed directions in each close packed plane

they are not close packed structures, they have no close packed planes, they have four close packed directions parallel to the diagonals

none

which are true for simple cubic crystal structures

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they are close packed structures, they have four close packed planes, they have four close packed directions in each close packed plane

they are not close packed structures, they have no close packed planes, they have three close packed directions in the x,y and z directions

they are not close packed structures, they have no close packed planes, they have four close packed directions parallel to the diagonals

they are close packed structures, they have four close packed planes, they have three close packed directions in each close packed plane

none

Which are true for face centered cubic crystal structures

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they are not close packed structures, they have no close packed planes, they have three close packed directions in the x,y and z directions

they are close packed structures, they have four close packed planes, they have four close packed directions in each close packed plane

they are not close packed structures, they have no close packed planes, they have four close packed directions parallel to the diagonals

they are close packed structures, they have four close packed planes, they have three close packed directions in each close packed plane

none

Fill-in-the-blanks

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the atomic packing factor of FCC crystals is

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The atomic packing factor of BCC crystals is

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The atomic packing factor of Simple cubic crystals is

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