Demo

You entered the OD groupoid family symbol: p2_1/b1(1) { 2_(1+r)/n_(1,2) -1 (-1)}

The OD groupoid family parsed fine.

General OD Family Symbol

p21/b1 (1)  
{2r'/c21(1)}

Reduced general OD Family Symbol

p21/b1 (1)  
{2r'/c21(1)}

General Data

OD family of layers

Kinds of layers:N=1
Category:I (single)
Pointgroup:2/m11 (C2h)
Crystal system:monoclinic
Layer system:rectangular
Common lattice:same
Common lattice size (rel. to global):1
Layer planes:(001)
c0(0,s/2,1)
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:p21/b1(1)
Crystal system:monoclinic
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):4
Order (modulo global lattice):4
Order (modulo common lattice):4
Floating origin:0,0,0

Symmetry operations:

x,y,z1
x+1/2,-y+1/2,-z21
-x+1/2,y+1/2,zb
-x,-y,-z1

Special positions:

x,y,z
0,0,0

Centring vectors:

none

Special parameters

Special parameters for σ-POs (right)

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