Pc Cs2 m Monoclinic info
No. 7 P1c1 Patterson symmetry P12/m1
UNIQUE AXIS b, CELL CHOICE 1

symmetry group diagram

Origin on glide plane c

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y ≤ 1/2; 0 ≤ z ≤ 1

Symmetry operations

(1)  1   (2)  c   x, 0, z  

Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 a 1
(1) xyz(2) x-yz + 1/2
h0l:
l = 2n

00l:
l = 2n

Symmetry of special projections

Along [001]   p11m
a' = ap   b' = b   
Origin at 0, 0, z
Along [100]   p1g1
a' = b   b' = cp   
Origin at x, 0, 0
Along [010]   p1
a' = 1/2c   b' = a   
Origin at 0, y, 0

UNIQUE AXIS b, DIFFERENT CELL CHOICES

symmetry group diagram

P1c1

UNIQUE AXIS b, CELL CHOICE 1

cell choice

Origin on glide plane c

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y ≤ 1/2; 0 ≤ z ≤ 1

Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 a 1
(1) xyz(2) x-yz + 1/2
h0l:
l = 2n

00l:
l = 2n

P1n1

UNIQUE AXIS b, CELL CHOICE 2

cell choice

Origin on glide plane n

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y ≤ 1/2; 0 ≤ z ≤ 1

Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 a 1
(1) xyz(2) x + 1/2-yz + 1/2
h0l:
h + l = 2n

h00:
h = 2n

00l:
l = 2n

P1a1

UNIQUE AXIS b, CELL CHOICE 3

cell choice

Origin on glide plane a

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y ≤ 1/2; 0 ≤ z ≤ 1

Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 a 1
(1) xyz(2) x + 1/2-yz
h0l:
h = 2n

h00:
h = 2n






Pc Cs2 m Monoclinic info
No. 7 P11a Patterson symmetry P112/m
UNIQUE AXIS c, CELL CHOICE 1

symmetry group diagram

Origin on glide plane a

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y ≤ 1; 0 ≤ z ≤ 1/2

Symmetry operations

(1)  1   (2)  a   xy, 0

Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 a 1
(1) xyz(2) x + 1/2y-z
hk0: h = 2n
h00: h = 2n

Symmetry of special projections

Along [001]   p1
a' = 1/2a   b' = b   
Origin at 0, 0, z
Along [100]   p11m
a' = bp   b' = c   
Origin at x, 0, 0
Along [010]   p1g1
a' = c   b' = ap   
Origin at 0, y, 0

UNIQUE AXIS c, DIFFERENT CELL CHOICES

symmetry group diagram

P11a

UNIQUE AXIS c, CELL CHOICE 1

cell choice

Origin on glide plane a

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y ≤ 1; 0 ≤ z ≤ 1/2

Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 a 1
(1) xyz(2) x + 1/2y-z
hk0: h = 2n
h00: h = 2n

P11n

UNIQUE AXIS c, CELL CHOICE 2

cell choice

Origin on glide plane n

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y ≤ 1; 0 ≤ z ≤ 1/2

Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 a 1
(1) xyz(2) x + 1/2y + 1/2-z
hk0: h + k = 2n
h00: h = 2n
0k0: k = 2n

P11b

UNIQUE AXIS c, CELL CHOICE 3

cell choice

Origin on glide plane b

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y ≤ 1; 0 ≤ z ≤ 1/2

Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 a 1
(1) xyz(2) xy + 1/2-z
hk0: k = 2n
0k0: k = 2n








































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