\documentclass{iucr}
Additional options will normally be specified with this command. The most common option is preprint, to produce a single-column double-spaced version of the paper suitable for review
purposes. Use this option for the hard-copy version of the paper submitted to the Co-editor:
\documentclass[preprint]{iucr}
Since the journals are not typeset directly from LaTeX (but from another language, SGML, into which the LaTeX file is translated), it is usually appropriate to prepare the manuscript solely in this `preprint' mode.
For camera-ready conference papers the preprint option may be omitted, and the paper should be made up according to the page style of the journal, including the proper placement of figures and tables. See the specific instructions for preparing conference papers in such cases
For papers containing long mathematical equations, it is helpful if the author processes the paper without the preprint mode during initial preparation, so that the equations may be adjusted to fit properly into the narrow columns of the journal.
\documentclass[preprint]{iucr}
\journalcode{A}
When accepted for publication, the final version to be submitted to the
editorial office should be prepared with the invocation
\documentclass{iucr}
\journalcode{A}
for full research papers, or
\documentclass[short]{iucr}
\journalcode{A}
for Short Communications, to ensure that mathematical equations will fit
into the narrow columns used in the journal.
\documentclass[abstract]{iucr}
For a conference abstract, only the following components are required: a title (using the \title macro); the author names and affiliations; keywords (note that for Conference abstracts
the keyword option is not required in the \documentclass line); the body of the abstract within an abstract environment; and a reference list constructed as plain
citations. For Conference abstracts only, references should be indicated by numbers in square brackets, [1], [2], etc., in the text. Numbering is generated automatically within the
reference list. Figures and tables may also be used sparingly in Conference abstracts. They are treated in the same way as other document types, and should be positioned at the appropriate locations
within the body of the abstract. A distinct template for Conference abstracts is available as the file abstemplate.ltx.
LaTeX and BiBTeX may be obtained free of charge from the Comprehensive TeX Archive or from a variety of public ftp archives. Specific implementations for many computer systems are also available from commercial vendors. A convenient source of the programs and supporting files is the TeXLive CD-ROM distribution.
The documentation is available in PDF format online.
LyX is an advanced open source document processor that encourages an approach to writing based on the structure of your documents, not their appearance. LyX lets you concentrate on writing, leaving details of visual layout to the software.A basic template file suitable for use with the iucr.cls macros is available by courtesy of Ethan Merritt, of the University of Washington.LyX runs on many Unix platforms, OS/2, and under Windows/Cygwin (this port requires an X server). It can also run natively on Mac OS X, thanks to the Qt/Mac library.
LyX produces high quality, professional output -- using LaTeX, an industrial strength typesetting engine, in the background; LyX is far more than a front-end to LaTeX, however. No knowledge of LaTeX is necessary to use LyX, although it will give a user more power.
LyX is stable and fully featured. It has been used for documents as large as a thesis, or as small as a business letter. Despite its simple GUI interface (available in many languages), it supports tables, figures, and hyperlinked cross-references, and has a best-of-breed math editor.