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Reflection conditions for the space group Pmma (No. 51)

Mult. Letter Site Sym. WP Representative Reflection conditions
General:
8 l 1 (x,y,z)
hk0: h=2n
h00: h=2n
Special: as above, plus
4 k m.. (1/4,y,z)
no extra conditions
4 j .m. (x,1/2,z)
no extra conditions
4 i .m. (x,0,z)
no extra conditions
4 h .2. (0,y,1/2)
hkl: h=2n
4 g .2. (0,y,0)
hkl: h=2n
2 f mm2 (1/4,1/2,z)
no extra conditions
2 e mm2 (1/4,0,z)
no extra conditions
2 d .2/m. (0,1/2,1/2)
hkl: h=2n
2 c .2/m. (0,0,1/2)
hkl: h=2n
2 b .2/m. (0,1/2,0)
hkl: h=2n
2 a .2/m. (0,0,0)
hkl: h=2n

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