Demo

You entered the OD groupoid family symbol: op p11(2/a) { 2_r/n_(s,2) 2_s/n_(2,-1+r) (-)}

The OD groupoid family parsed fine.

General OD Family Symbol

opp11 (2/a)  
 {2r'/ns',22s'/n2,-1+r'(-)}

Reduced general OD Family Symbol

opp11 (2/a)  
 {2r'/ns',22s'/n2,-1+r'(-)}

General Data

OD family of layers

Kinds of layers:N=1
Category:I (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/a)
Crystal system:monoclinic
Layer system:oblique
Polarity:non-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:0,0,0

Symmetry operations:

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

Special positions:

x,y,z
1/4,0,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'=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] 1/4,0,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: nfz2-3-1 (2s' [010] -1/4+r'/4,y,1/2)
    1. n=0
    2. n=1