## Computing methods and the phase problem in X-ray crystal analysis: report of a conference held at the Pennsylvania State College, April 6-8, 1950X-ray Crystal Analysis Laboratory, Dept. of Physics, Pennsylvania State College, 1952 - Science - 390 pages |

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### Contents

INTRODUCTORY REMARKS Mina Rees Director Division | 1 |

THE INTERPRETATION OF THE PATTERSON SYNTHESIS | 18 |

THE APPLICATION OF IMAGE THEORY IN CRYSTAL STRUCTURE | 43 |

Copyright | |

16 other sections not shown

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### Common terms and phrases

Acta Cryst amplifier amplitude analogue applied approximation atomic positions atoms axis binary Buerger calculation cards center of symmetry centro-symmetrical circuits coincident complex computing contour convolution coordinates corresponding cosine crystal structure density function derived diagram diffraction discussed electron density equations Fd(X Fourier coefficients Fourier series Fourier synthesis Fourier transform frequency Harker heavy atom indicated inequalities integral isomorphous kernel MacGillavry machine mathematical matrix method molecule multiplied non-negative number of atoms obtained operation origin parameters Patterson function Patterson map Patterson peak peaks Pepinsky permit phase determination phase problem plane points possible present procedure punched reciprocal lattice reciprocal space relations rotation S-FAC sampling scattering Schomaker screw axis SEAC shown in Fig signals signs sine solution space group structure determination structure factors summation three-dimensional tion translation unit unit cell values vector set weight wheels X-RAC X-ray analysis zero