Gallium substitution in alumosilicate sodalites [Elektronische Ressource] / von Mohammad Mangir Murshed

GALLIUM SUBSTITUTION IN ALUMOSILICATE SODALITES Vom Fachbereich Geowissenschaften und Geographie der Universität Hannover zur Erlangung des Grades Doktor der Naturwissenschaften Dr. rer. nat. genehmigte Dissertation von MOHAMMAD MANGIR MURSHED geboren am 31 Dezember 1975 in Chandpur, Bangladesch Institut für Mineralogie Februar 2005 2 Referent : PD Dr. habil. Thorsten Michael Gesing Koreferenet : Professor Dr. Josef-Christian Buhl Professor Dr. Wulf Depmeier Dr. Andrew John Baer Tag der Promotion: 14 Februar 2005 3 Dedicated to my wife Lipi 4 Acknowledgement I am extremely thankful to PD Dr. habil. Thorsten Michael Gesing who introduced me to the exciting field of zeolite chemistry, X-ray diffractrometry and Rietveld refinement. His continuous supervision at each and every part has made this study as a full fledged thesis. He was exceptionally enthusiastic in providing new ideas in structure refining as well as supportive in implementation of novel suggestions. My sincere gratitude is also due for his tireless effort in designing, editing and discussions which have brought this thesis to its present form. I am proud to have him as my direct supervisor. I am indebt to Professor Dr.