Demo

You entered the OD groupoid family symbol: op { -1 -1 (n_(-r,-s))} p11(2) { 2_(r') 2_(s') (-)}

The OD groupoid family parsed fine.

General OD Family Symbol

opp11 (2)  
 {11(n-r'',-s'')}
 {2r'''2s'''(-)}

Reduced general OD Family Symbol

opp11 (2)  
 {11(n-r'',-s'')}
 {2r'''2s'''(-)}

General Data

OD family of layers

Kinds of layers:N=1
Category:III (single)
Pointgroup:mmm (D2h)
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:p11(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):2
Order (modulo global lattice):2
Order (modulo common lattice):2
Floating origin:0,0,z

Symmetry operations:

x,y,z1
-x,-y,z2

Special positions:

x,y,z
0,0,z

Centring vectors:

none

Special parameters

Special parameters for σ-POs (left)

  1. (general, reduced)
    Codes: general, reduced
    1. No subparameters.
  2. r''=r+2l, s''=s+2l', l,l'∈ℤ (user)
    Codes: user-1
    1. l=0, l'=0
  3. r''=m, s''=n, 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

Special parameters for σ-POs (right)

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