<p>This thesis is focussing on the crystallographic challenges and what knowledge we can gain from studying the different open-framework germanates. Five new open-framework germanates have been synthesized and the structures have been determined by single crystal X-ray diffraction. A thorough description is made of the different problems raised with the different compounds, whether it is choice of crystal system in SU-61, twinning and possible ordering in SU-46, superstructure and variation in elemental content in SU-57, template disorder in JLG-5 or framework disorder in SU-44.</p><p>Open-framework germanates are often built from one type of cluster, such as the Ge<sub>7</sub> [Ge<sub>7</sub>X<sub>19</sub>], Ge<sub>8</sub> [Ge<sub>8</sub>X<sub>20</sub>], Ge<sub>9</sub> [Ge<sub>9</sub>X<sub>n</sub>, n =25-26] and Ge<sub>10</sub> [Ge<sub>10</sub>X<sub>28</sub>], (X =O, OH, F) clusters. The structures built by clusters containing different kinds of polyhedra are discussed, with a focus on the 4-coordinated Ge<sub>7</sub> clusters, the larger cluster aggregate found in SU-8 and SU-44 and the structures built by the Ge<sub>10</sub> clusters.</p>
| Identifer | oai:union.ndltd.org:UPSALLA/oai:DiVA.org:su-7501 |
| Date | January 2008 |
| Creators | Christensen, Kirsten Elvira |
| Publisher | Stockholm University, Department of Physical, Inorganic and Structural Chemistry, Stockholm : Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Doctoral thesis, comprehensive summary, text |
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