Abstract
Often some primitive random variables (e.g.the atomic coordinates) are non-uniformly distributed over the unit cell. Prior information about such distributions is often available but not always used in current direct-methods procedures. Examples are described according to which primitive random variables are restricted to some domains (attended domains) or, in an equivalent way, are prevented from frequenting some domains (forbidden domains). Emphasis has been put on the fact that non-uniform distributions generate phase relationships which are not structure invariants or seminvariants, but it is also anticipated that formulas for estimating phase invariants and seminvariants are deeply affected by such prior information.
Publisher
International Union of Crystallography (IUCr)
Cited by
1 articles.
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