mmm (D2p,No.47) P P 2/m 2/m 2/m +D-①+ +D-①+ +① -①+ +①- -D+ +D- -①+ +D- -①+ +①- -D+ +G①- -①+ 俯视图（单胞）：（左）一般等效点位置 (右)对称元素分布 8 a 1 x,z;z;七；， Symmetry operations y云；yz;,z. (1)1 (2)20,0.z (3)20,.0 (4)2x,0.0 (5)10.0,0 (6mx,y,0 (7)mx,0,z (8)m0,y,2 ammm0,0,0
x y Pmmm (D2h, No. 47) 1 + , - + , - - , + , + - + , - + , - - , + , + - + , - + , - - , + , + - + , - + , - - , + , + - P 2/m 2/m 2/m 俯视图(单胞)： (左)一般等效点位置 (右)对称元素分布 8 1 x,y,z; x,y,z; x,y,z; x,y,z; x,y,z; x,y,z; x,y,z; x,y,z. 1 a mmm 0,0,0
P4nc No.104 P4nc 4mm Tetragonal + 4v +ON )+ +O O+ 2+O 回2+ 2+回 回+， w +O O+ +O O+ +O O+ +0 ○+ Origin on 4 Conditions limiting Number of positions, possible reflections Wyckoff notation, General: and point symmetry Co-ordinates of equivalent positions kl:No conditions 8 1 xz;2+比，h-么+z;h-x,+y6+2) 0kl:k+1=2n x,z;y,;为+y,h+比，+z；2y,-x,-z. lkl:I=2n X Special: 4 b 2 0,h,z;h,0z 0,h,+z;2,0,+z. lakl:h+k 2n;I=2n 2 A 0,0z; V,V,Vtz. hkl:h+k+1=2n
P4nc 4mm Tetragonal + + + + + + + + + + + + + + + + , , ½+ ½+ ½ ½+ + , , 8 c 1 x,y,z; x,y,z; ½+x,½-y,½+z; ½-x,½+y,½+z; y,x,z; y,x,z; ½+y,½+x,½+z; ½-y,½-x,½-z. 4 b 2 0,½,z; ½,0,z; 0,½,½+z; ½,0,½+z. 2 a 4 0,0,z; ½, ½, ½+z. Origin on 4 Number of positions, Wyckoff notation, and point symmetry Co-ordinates of equivalent positions 6 C4v No. 104 P4nc Conditions limiting possible reflections General: hkl: No conditions 0kl: k + l = 2n hkl: l = 2n Special: hkl: h + k = 2n; l = 2n hkl: h + k + l = 2n
Pm3m Na.221 P4/m32/m o Cu R3c Origin at centre (m3m) R32/c Da Na167 3 m ho56ot 1 8 8 Special: 8 56 24 标城市 滋 毯 蔻 960%12g4o53 8 8-8 egt pg0 滋 溢解 禁 Origin at centre Co-pnlateadequialeotpoatcea o 12 实 (RHOMBOHEDRAL AXES 121 8 微0 General: 124 批8损=：州 磁碳 批过 a0ar第Godi0ot间 6 f Anum x考民 I 1.00:01.0;00.4:0:10.:11.0. 6 e 4mom x.0.0:0.x,0:0.0.c;.0.0:0.E0:0.0.8. J是1+++-耐-x- d4mmm:: hk灶h+k+-2a b300.gh. 3 aiin:0 3244Md mim 0.0,0 2
Positions Multiplicity, Coordinates Reflection conditions Wyckoff letter. Site symmetry General: 8a1 (1)x,y, (2)x, (3),y,3 (4)x,y, no conditions (5)x,2 (6)x,y2 (7)x, (8),y,2 Special:no extra conditions 4之，m x,Yi , 无，y x,灭， 4 y x,y,0 元，0 元，y0 x,立，0 P品品品 4 x x,2 ,z 元，2 x,2 4 71 x,0,3 元，0，z 元，0,2 x,0, 4 m ,y2 ,2 ,y2 ,2 4 0,y,2 0,2 0,y 0,y,3 mm2 ,2 ,2 2 mm2 ,0,2 ,0,2 mm2 0,2 0,2 2 mm2 0,0.z 0,0,2 2 p m2m ,y, , I h mmm , 2 o m2m y,0 生灭，0 18 mmm 0, n m2m 0,八行 0,5 1 f mmm ,0 2 m m2m 0,y0 0,0 mmm 0,0 212mm x,左 无， I d mmm ,0, 2 k 2mm x,0 元，0 mmm 0,0, 2 j 2mm x,0, x,0,1 1 b mmm ,0,0 2 i 2mm x,0,0 元，0,0 1 a mmm 0,0.0
非点式空间群
非点式空间群