Space groups (166) R-3m – (160) R3m: 43A6 (Landolt-Börnstein: Numerical Data and Functional Relationships in Science and Technology - New Series) - Tapa dura

In the 1970s Landolt-Börnstein published a series of volumes containing crystallographic data for organic (III/5 Structure Data of Organic Crystals), intermetallic (III/6 Structure Data of Elements and Intermetallic phases) and inorganic compounds (III/7 Crystal Structure Data of Inorganic Compounds). During the 30 years that have passed, the experimental methods leading to a complete structure determination have considerably improved and the large number of crystal structures known today justifies the publication of a new compilation. The present volume will cover both intermetallic and classical inorganic compounds, a clear limit having been drawn by excluding compounds that contain C-H bonds. Whereas the earlier edition listed space group/crystal system and cell parameters for different classes of compounds, we have here chosen a different approach by grouping known crystal structures into structure types. The structure type concept is widely used among inorganic compounds, where the number of isotypic compounds can reach several hundreds. The first subvolumes will contain complete crystallographic data sets, including atom coordinates, that represent distinct structure types, whereas the last subvolumes will list cell parameters of isotypic compounds. The crystallographic data are accompanied by remarks and crystallographic features common to isotypic compounds, such as the atomic environments, a brief description of the main structural features, and drawings of selected structure types.

Volume 43 of Group III deals with crystallographic data of both intermetallic and classical inorganic compounds, thus forming an update of the former Landolt-Bornstein volumes III/6 (Structure Data of Elements and Intermetallic Phases) and III/7 (Crystal Structure Data of Inorganic Compounds). It does not include compounds that contain C-H bonds. Moreover, in contrast to the earlier edition the present volume presents the data in a different, more modern arrangement - known crystal structures are combined in groups according to their type of structure; each structure type is therefore represented by a complete set of crystallographic data holding for all isotypic structures, with the data comprising space group, cell parameters and atom coordinates. Remarks, descriptions and figures are provided where necessary. The present subvolume A 6, which utilizes the databases TYPIX and Pauling File, forms the sixth contribution to volume 43, which is going to be published in a series of subvolumes. Subvolumes A 1 - A 5 are already available.