Demo

You entered the OD groupoid family symbol: p11(a) { -1 -1 (2_2)} [-1/2+r,s]

The OD groupoid family parsed fine.

General OD Family Symbol

p11 (a)  
{11(22)}
 [-1/2+r',s']   

Reduced general OD Family Symbol

p11 (a)  
{11(22)}
 [-1/2,0]   

This OD subfamily is fully ordered and equivalent to

Pc'=2c1121/a

General Data

OD family of layers

Kinds of layers:N=1
Category:I (single)
Pointgroup:112/m (C2h)
Crystal system:monoclinic
Layer system:oblique
Common lattice:same
Common lattice size (rel. to global):1
Layer planes:(001)
c0(0,0,1)
Global lattice restriction:none
User supplied lattice restriction:none
Lattice restriction derived from layers:none

Layer Data

Layer 0:

Type:Layer group
Symbol:p11(a)
Crystal system:monoclinic
Layer system:oblique
Polarity:non-polar
Lattice restriction (instrinsic):none
Lattice restriction (extrinsic):none
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:x,y,0

Symmetry operations:

x,y,z1
x+1/2,y,-za

Special positions:

x,y,z

Centring vectors:

none

Special parameters

Special parameters for σ-POs (right)

  1. (general)
    Codes: general
    1. No subparameters.
  2. r'=0, s'=0 (reduced)
    Codes: reduced
    1. No subparameters.
  3. r'=r, s'=s (user)
    Codes: user-1
    1. No subparameters.