(a) Draw an orthorhombic unit cell, and within that cell, a \((02 \overline{1})\) plane. (b) Draw a monoclinic unit cell, and within that cell, a (200) plane.

Question: Draw an orthorhombic unit cell with the (02-1) plane and a monoclinic unit cell with the (200) plane. Answer: To draw an orthorhombic unit cell with the (02-1) plane, create a rectangular prism with three unequal axes labeled a, b, and c. Find the intersection points of the plane with the b and c axes: at 1/2 and -1, respectively. Connect these points to form the plane within the unit cell, and shade the (02-1) plane. To draw a monoclinic unit cell with the (200) plane, create a non-rectangular prism with three non-equal axes, where b inclines at angle β, and a and c are perpendicular. Label the axes of the monoclinic unit cell with their length designations (a, b, and c). Find the point where the (200) plane intersects the a axis: point (1,0,0). Draw the plane parallel to the b and c axes from this point, and shade the (200) plane within the unit cell.