CRILSQ : Structure factor least-squares refinement 2

maxhkl reflection limits to be used in ls refinement
twin twinning operation in reciprocal space
constr linear contraints between parameters
noref shut off refinement of specified parameters

CRILSQ Option Code Arg   Def
  number of refine cycles cy n   1
  dispersion nd   do not apply dispersion  
  overall tdp ov   apply and refine overall tdp  
  extinction ex   apply and refine extinction parameter  
  Flack param ab   apply and refine Flack absolute structure parameter  
  occupancy factor ro   apply and refine occupancy factor  
  reflection skip sk n use every n-th reflection 2
  weighting scheme wt n n = 1 unit weights 3
        n = 2 weight from bdf  
        n = 3 weight = 1/variance  
  contribute to refl. ls mr q only if w*|dY| < q  
  contribute to refl. ls ml   exclude rcode 2 reflections (included by default)  
  shift damping factor sd q   1.0
  terminate refinement tc   if convergence reached  
  list li n n reflections after last cycle 99999
    lr q poor reflections if w*|dY| > q  
    lm   matrix and vector after last cycle  
    lc q correlation matrix for elements > q  
  punch pc   parameter lines to .pchfile  
  save sm   correlation matrix to .cmxfile  

maxhkl 1-3 max |h|, |k|, |l|in refinement process from bdf (see ADDREF )
  4 min value of sin(θ) applied from bdf (see ADDREF )
  5 max value of sin(θ) applied from bdf (see ADDREF )

twin 1-9 matrix of symmetry operation in reciprocal space coded as:  
    m11 m12 m13 m21 m22 m23 m31 m32 m33  
  10 number of twin fractions  
  11 volume ratio of twin fraction 1  
  12- volume ratio of twin fraction 2, 3 ... [a]  

[a] A maxmum of 8 fractions are allowed, they should be in sequence and form a closed group (see CRILSQ )

constr contraint equation (see CRYLSQ )
  Embedded blanks are allowed.

noref invariant parameter string (see CRYLSQ )
  No embedded blanks are allowed.
  The general parameters SKF, UOV, EXT, ABS RID and TWI can be shut off
  as well as the atom parameters X,Y,Z,U,U11,U22,U33,U12,U13,U23,UIJ and POP.