[1
]Institute of Mineralogy; Leibniz University of Hannover; Callinstra ß e 3 Hannover
DE-30167 Germany
[2
]Department of Geology and Paleontology; National Museum of Nature and Science; 4-1-1
Amakubo, Tuskuba 305-0005 Japan
[3
]Institute of Disposal Research; Clausthal University of Technology; Adolph-Roemer-Straβe
2A, Clausthal-Zellerfeld DE-38678 Germany