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lect7_inttable - Base centering(C x y z x y z Lattice...

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1 Lattice Centering ° Base centering (C) ± x, y, z ± x+‰, y+‰, z ° Body centering (I) ± x, y, z ± x+‰, y+‰, z+‰ ° Face centering (F) ± x, y, z ± x+‰, y+‰, z ± x+‰, y, z+‰ ± x, y+‰, z+‰ ° Rhombohedral centering (R) ± x, y, z ± x+ 1 / 3 , y+ 2 / 3 , z+ 1 / 3 ± x+ 2 / 3 , y+ 1 / 3 , z+ 2 / 3 Glide Planes in 3D ° a-glide ± Translate by ‰ a ° b-glide ± Translate by ‰ b ° c-glide ± Translate by ‰ c ° n-glide ( to a ) ± Translate by ‰ b + ‰ c ° n-glide ( to b ) ± Translate by ‰ a + ‰ c ° n-glide ( to c ) ± Translate by ‰ a + ‰ b ° d-glide ± Translate by … a +… b +… c The glide translation must always be parallel to the glide plane. International Tables for Crystallography ± Volume A Entry for Space Group P2 1 /c (#14) Page 1 Page 1 Page 2 Page 2
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2 Herman- Mauguin Space Group Symbols (Short & Long) Schoenflies Space Group Crystal System Point Group c a a c b b 2 1 Screw Axis Inversion Center c-glide plane Glide translation in the plane of the projection Glide translation perpendicular to the plane of the projection P 1 2 P 1 2 1 /c 1 /c 1 Axes parallel to or planes perpendicular to the b-axis
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