Demo

You entered the OD groupoid family symbol: c2/m1(1) { - n_(2,r) (n_(-1+r,-1+s))}

The OD groupoid family parsed fine.

General OD Family Symbol

c2/m1 (1)  
-2s'22
n2,r'nr',s'
21+s'n1+r',1+s'
n2,1+r'

Reduced general OD Family Symbol

c2/m1 (1)  
-2s'22
n2,r'nr',s'
21+s'n1+r',1+s'
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:none
Lattice restriction derived from layers:ab=0

Layer Data

Layer 0:

Type:Layer group
Symbol:c2/m1(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):8
Order (modulo global lattice):8
Order (modulo common lattice):8
Floating origin:0,0,0

Symmetry operations:

x,y,z1
x,-y+1/2,-z2
-x+1/2,y,zm
x+1/2,y+1/2,ztC
-x+1/2,-y+1/2,-z1
x+1/2,-y,-z21
-x,y+1/2,zb
-x,-y,-z1

Special positions:

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

Centring vectors:

(1/2,1/2,0)

Special parameters

Special parameters for σ-POs (right)

  1. (general, reduced)
    Codes: general, reduced
    1. No subparameters.
  2. r'=r+l'+l'', s'=s+l'-l'', l',l''∈ℤ (user)
    Codes: user-1, user-2, user-3, user-4
    1. l'=0, l''=0
  3. r'=n, n∈ℤ (special)
    Codes: nfz1-3-3 (m [100] 1/4,y,z)
    1. n=0
    2. n=1
  4. s'=n, n∈ℤ (special)
    Codes: nfz2-1-1 (2s' [010] 1/4+r'/4,y,1/2)
    1. n=0
    2. n=1
  5. r'=m/2+n/2, s'=m/2-n/2, m,n∈ℤ (special)
    Codes: nfz2-4-1 (nr',s' [001] x,y,1/2)
    1. m=0, n=0
    2. m=1, n=0
    3. m=0, n=1
    4. m=1, n=1