Demo

You entered the OD groupoid family symbol: op { 2_(-r) 2_(-s) (-)} c11(2) { 2_(r') 2_(s') (-)}

The OD groupoid family parsed fine.

General OD Family Symbol

opc11 (2)  
 2-r''2-s''-
 21-r''21-s''
 2r'''2s'''-
 21+r'''21+s'''

Reduced general OD Family Symbol

opc11 (2)  
 2-r''2-s''-
 21-r''21-s''
 2r'''2s'''-
 21+r'''21+s'''

General Data

OD family of layers

Kinds of layers:N=1
Category:III (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:ab=0
Lattice restriction derived from layers:none

Layer Data

Layer 0:

Type:Layer group
Symbol:c11(2)
Crystal system:monoclinic
Layer system:oblique
Polarity:polar
Lattice restriction (instrinsic):none
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):4
Order (modulo global lattice):4
Order (modulo common lattice):4
Floating origin:0,0,z

Symmetry operations:

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

Special positions:

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

Centring vectors:

(1/2,1/2,0)

Special parameters

Special parameters for σ-POs (left)

  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: nfz1-2-2 (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: nfz2-1-1 (2r'' [100] x,s''/4,-1/2)
    1. n=0
    2. n=1
  5. s''=n, n∈ℤ (special)
    Codes: nfz2-2-1 (2s'' [010] r''/4,y,-1/2)
    1. n=0
    2. n=1

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: nfz1-2-2 (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: nfz2-1-1 (2r''' [100] x,s'''/4,1/2)
    1. n=0
    2. n=1
  5. s'''=n, n∈ℤ (special)
    Codes: nfz2-2-1 (2s''' [010] r'''/4,y,1/2)
    1. n=0
    2. n=1