The method of joint probability distribution functions applied to MAD techniques. The two-wavelength case for acentric crystals

被引：10

作者：

Giacovazzo, C

Siliqi, D

机构：

[1] Univ Bari, Dipartimento Geomineral, IRMEC, I-70125 Bari, Italy

[2] Fac Nat Sci, Dept Inorgan Chem, Lab Xray Diffract, Tirana, Albania

来源：

ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES | 2001年 / 57卷

关键词：

D O I：

10.1107/S0108767301011837

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

MAD (multiple-wavelength anomalous dispersion) techniques are often considered as a special MIR (multiple isomorphous replacement) case. The rigorous method of the joint probability distribution functions is applied to solve the phase problem for acentric crystals, on the assumption that the anomalous scatterer's substructure is a priori known. The two-wavelength case is considered: errors in measurements and in the model substructure are handled. The probabilistic approach provides a very simple and efficient formula for estimating structure-factor phases.

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收藏

页码：700 / 707

页数：8

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