About the World Directory of Crystallographers

The World Directory of Crystallographers and of Other Scientists Employing Crystallographic Methods (WDC) is periodically published by the IUCr as a resource providing contact details and scientific interests of active crystallographic researchers.

Up to the 8th edition in 1990 only paper copies were produced but subsequently the situation changed considerably due to the rapid growth of computer networks. The 9th edition (WDC9) was the first one also accessible over the Internet. The entries were stored in the form of a database. Since the IUCr had by that time established its own format for crystallographic information, it was decided to use the same format, i.e. to store the data as STAR files (the same format used for Crystallographic Information Files, CIF). From these a qi database was created in 1995 to enable WDC to be interrogated through the Web and Tex files were created for the printing of the paper edition of the directory.

Internet use of the database has been very successful. The number of interrogations grew rapidly and a new relational database implementation was launched at the end of 2001. Since that time no hard-copy edition has been published.

Edition	Year	General Editor	Associate Editor/Regional Editors	Number of entries	Number of countries	Publisher	Comment
1	1957	W. Parrish		2255	52	North American Philips Co. Inc.
2	1960	D. W. Smits		3557	54	N. V. A. Oosthoek's Uitgeversmaatschappij
3	1965	D. W. Smits	G. Boom (Assistant Editor)	5037	51	A. Oosthoek's Uitgeversmaatschappij N. V.
4	1971	G. Boom	N. A. Mulder-Hoekstra (Assistant Editor)	6982	57	A. Oosthoek's Uitgeversmaatschappij N. V.
5	1977	S. C. Abrahams	A. L. Bednowitz	7638	71	Polycrystal Book Service	First use of computerised typesetting system (IBM TERMTEXT/Format)
6	1981	A. L. Bednowitz		8174	68	D. Reidel Publishing Company
7	1986	A. L. Bednowitz	A. P. Segmüller	8968	69	D. Reidel Publishing Company	Typeset with IBM Document Composition Facility (GML-SCRIPT)
8	1990	E. N. Maslen	A. L. Bednowitz	9589	70	Kluwer Academic Publishers
9	1995	Y. Epelboin	G. Filippini,H. Hashizume, I. L. Torriani, W. L. Duax	7907	72	Kluwer Academic Publishers	First online database version: data collected in STAR format and typeset using ciftex
10	1997	Y. Epelboin	G. Filippini, H. Hashizume, I. L. Torriani, Y. Le Page	7959	74	Kluwer Academic Publishers
11	2001	Y. Epelboin; from 2008 I. L. Torriani	G. Filippini, I. L. Torriani, K. Ogawa				First electronic-only edition; all data entry via Web

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About the World Directory of Crystallographers