Haifu Fan, Chinese crystallographer (Guangzhou, Guangdong Province 15 August 1933 – Beijing 08 July 2022)

Developed methods for solving various kinds of phase ambiguity and for direct determination of incommensurate modulated structures

Established multi-dimensional direct methods in solving crystal structures

With F.H. Li proposed a new image processing method in high-resolution electron microscopy  

Proposed the direct-methods aided dual-space fragment extension method, which enhances the power of single wavelength anomalous diffusion (SAD) phasing and automatic structure-model building (incorporated to computer program OASIS)

Proposed the combination of the direct method with heavy atom method for solving superstructures