Abstract
The sign correlation procedure, one of the oldest computer-oriented applications of the Σ2 relationship, was developed in the early sixties (Beurskens, 1964). At that time, the procedure was applicable only to centrosymmetric structures. The name “sign correlation procedure” will be used now only when referring explicitly to centrosymmetric structures; otherwise, the more general term “phase correlation procedure” will be used. The sign correlation procedure was programmed for the IBM 1620 computer (Beurskens, 1963) and applied successfully to several centrosymmetric structures (Sax et al., 1965). Thereafter, an automatic program was written in ALGOL-60 (Beurskens, 1965).
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References
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© 1980 Plenum Press, New York
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Beurskens, P.T., van den Hark, T.E.M. (1980). Phase Correlation with Calculated Cosine Invariants for Routine Structure Analysis. In: Ladd, M.F.C., Palmer, R.A. (eds) Theory and Practice of Direct Methods in Crystallography. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2979-4_6
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DOI: https://doi.org/10.1007/978-1-4613-2979-4_6
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