Demo

You entered the OD groupoid family symbol: c22(2) { 2_r 2_s (2_2)}

The OD groupoid family parsed fine.

General OD Family Symbol

c22 (2)  
2r'2s'22
21+r'21+s'

Reduced general OD Family Symbol

c22 (2)  
2r'2s'22
21+r'21+s'

General Data

OD family of layers

Kinds of layers:N=1
Category:I (single)
Pointgroup:222 (D2)
Crystal system:orthorhombic
Layer system:rectangular
Common lattice:same
Common lattice size (rel. to global):1
Layer planes:(001)
c0(0,0,1)
Global lattice restriction:ab=0
User supplied lattice restriction:none
Lattice restriction derived from layers:ab=0

Layer Data

Layer 0:

Type:Layer group
Symbol:c22(2)
Crystal system:orthorhombic
Layer system:rectangular
Polarity:non-polar
Lattice restriction (instrinsic):ab=0
Lattice restriction (extrinsic):ab=0
Lattice (rel. to global):same
Lattice (rel. to common):same
Lattice size (rel. to global):1
Lattice size (rel. to common):1
Order (modulo lattice):8
Order (modulo global lattice):8
Order (modulo common lattice):8
Floating origin:0,0,z

Symmetry operations:

x,y,z1
x,-y,-z2
-x,y,-z2
-x,-y,z2
x+1/2,y+1/2,ztC
x+1/2,-y+1/2,-z21
-x+1/2,y+1/2,-z21
-x+1/2,-y+1/2,z2

Special positions:

x,y,z
x,0,0
0,y,0
0,0,z
1/4,1/4,z

Centring vectors:

(1/2,1/2,0)

Special parameters

Special parameters for σ-POs (right)

  1. (general, reduced)
    Codes: general, reduced
    1. No subparameters.
  2. r'=r+l, s'=s+l', l,l'∈ℤ (user)
    Codes: user-1, user-2, user-3, user-4
    1. l=0, l'=0
    2. l=1, l'=0
  3. r'=m/2+n/2, s'=m/2-n/2, m,n∈ℤ (special)
    Codes: nfz1-4-4 (2 [001] 0,0,z)
    1. m=0, n=0
    2. m=1, n=0
    3. m=0, n=1
    4. m=1, n=1
  4. r'=n, n∈ℤ (special)
    Codes: nfz2-2-1 (2r' [100] x,s'/4,1/2)
    1. n=0
    2. n=1
  5. s'=n, n∈ℤ (special)
    Codes: nfz2-3-1 (2s' [010] r'/4,y,1/2)
    1. n=0
    2. n=1