Liren Large Software Subsidy 13/13.iso/p/p260/1.ddi/CURSOR.HLP

Text File | 1989-11-02 | 1.8 KB | 32 lines

** Help file ALNFAC.HLP - Alignment of slice

To align a face or slice, it is necessary to specify a vector lying in the
face which will be vertical (z direction). If a vector [uvw] lies in a face
(hkl), the indices satisfy the condition  hu + kv + lw = 0. If orthographic
viewing is in effect, it is turned off when the face or slice is aligned, to
simplify any subsequent rotations.

You can elect to use the default alignment vector, instead of specifying it.
The default vector will be the intersection of the face or slice (hkl) with
the face (100); the indices of this vector are given by the cross product
(hkl)x(100).  If the face (hkl) is (100), the default alignment vector will be
the vector [001].


stu    xyz{|}~Çüé≥äàåçêëèïîìÄÅÉæÆôöòûùÿÖÜ¢  ¥₧ƒáíóúñѪº¿⌐¬½¼¡«»░▒▓│┤╡╢╖╕╣║╗╝╜╛┐└┴┬├─┼╞╟╚╔╩╦╠═╬╧╨╤╥╙╘  ╓╫╪┘┌█▄▌▐▀αßΓπΣσµτΦΘΩδ∞φε∩≡±  ≤    ÷≈°∙·  ⁿ²■ ** Help file BNDARY.HLP - Boundary options

[B.3.3] BOUNDARY OPTIONS.

For crystals and polymers, some limitations must be applied to the repetition
of atoms by means of the lattice translations.  Five choices are available:
note that suboptions 1-3 are not applicable to molecules, while suboption 4 is
not applicable to crystals.  When the boundary option involves a crystal face
(suboptions 1-3), atoms lying exactly on the boundary will be included (except
for the lower face of a slice - see [B.3.3.3]).

[B.3.3.1] DEFAULT - UNIT CELL.

This option (not intended for molecules) simply sets up the faces which define
the unit cell: you can choose either the primitive or Bravais cell if the
lattice is non-primitive.  If the Bravais lattice is primitive, or if you
elect not to use the primi