The defect caused by an extra half plane of atoms which end within the crystal is called

If the stacking sequence of the crystal structure is not in order then the defect is called a stacking fault.

HCP crystal structure has

Which material properties are affected by temperature? List 2 properties and explain how the property increases or decreases with an increase in temperature.

Single crystals are isotropic.

A material with an ionic bond is likely to be a good conductor of heat/electricity.

If the stacking sequence of the crystal structure is not in order, then the defect is called as

Why do different grains of the same material appear to be different shades (ranging from white to black) when viewed under the microscope?

Explain why the external surface of the material is considered a defect.

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